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Thread: Western Digital

  1. #1
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    Lightbulb WD740GD Raptor Reviews

    WD 10K Raptor 74GB
    To give its 10K-RPM Serial ATA drives more widespread appeal, Western Digital upped the Raptor's capacity to 74GB for the WD740GD model, but didn't stop there. The new Raptor's internals have also been tweaked to give the drive faster seek times and transfer rates, lower noise levels, and support for command queuing. The Raptor packs a five-year warranty.

    If you're looking for the fastest performance for single-user applications, it doesn't get much better than the WD740GD. The original Raptor was already an impressive performer, and its successor's improved performance and larger capacity take the goodness to the next level.

    Unfortunately, as great as the WD740GD is in single-user applications, the drive doesn't scale nearly as well as 10K RPM SCSI disks under multi-user loads. The WD740GD's tagged command queuing support should help boost multi-user performance, but this capability won't be tapped until controller cards arrive with TCQ support.

    Ironically, it appears the Raptor may have met its greatest success not in the server market but rather with the enthusiast/gaming community itself. The Raptor's firmware, designed by a company that had already proved itself as the best at optimizing for the desktop, allowed it to match and even exceed the single-user performance delivered by the latest-generation 10k RPM SCSI units.


    Storage Review Raptor review
    StorageReview has the first benchmarks of Western Digital's new Raptor WD740GB, and the 10K RPM Serial ATA drive's performance looks impressive indeed. Can't wait to see the full review.

    . . . . . . .
    Raptor 74gb made in December 2004, and it has 4 jumpers on the back labelled: SSC_DIS, PM2, OPT1, OPT2.
    SSC_DIS came with a jumper on it, the rest are left open.
    SSC is Spread Spectrum Clocking. Some drives have to be jumpered to enable this option, and some have to be jumpered to disable it (!) I guess yours is "jumper to disable".
    PM2 is power management - start without spin-up.
    OP1 & OPT2 are "factory use only".
    http://www.wdc.com/en/library/eide/2579-001037.pdf
    WD jumper info

    SATA Raptor firmware; jumpers to enable/disable SCC SR Forums.

    Raptor Software Utilities
    Last edited by TZ; 12-09-2005 at 11:27 AM.

  2. #2
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    Lightbulb 160GB Storage

    Not only is it an excellent review, but a look at how to test, benchmark, and what to look for yourself in testing or choosing a drive.

    Mega Roundup 3: Twenty One Hard Disk Drive with 160GB Storage Capacity
    Category: Storage
    by Alexey Volkov , Nikita Nikolaichev
    07/19/2004Ę|Ę04:07 PM

    Today we are going to take a closer look at the performance and features of 21 hard disk drives from such well-known storage device manufacturers as Western Digital, Samsung, Seagate, Maxtor and Hitachi. We will test the solutions with 160GB storage capacity to find out which one is the todayŐs best, fastest and most attractive choice.
    ...............
    Conclusion

    The drives from Hitachi looked well in IOMeter (File Server and Web Server patterns) – the drive of the older generation, the IC35L180AVV207-1, was especially good due to its small access time.

    The Seagate ST3160023AS with firmware 3.05 did well in that test, too, but these high results were because of the unfortunate incident with the Promise controller (it didn’t recognize the full capacity of the drive). That’s why we exclude that drive with that firmware version from further discussion.

    Thus, the drives from Hitachi will be the best choice for a server; the SATA drives from Seagate are the second best. On the contrary, the PATA drives from Seagate are most inefficient at server applications, and the Seagate ST3160023A with firmware 3.71 is the worst of them all.

    Devices equipped with an 8MB cache buffer take the lead in WinBench 99. We’d like to especially mark the performance of the Maxtor drives that won High-End Disk Winmark and the WD team that showed a nice speed in Business Disk Winmark.

    The Hitachi drives were only efficient on small files in the FC Test. The interface didn’t practically affect the performance there. The drives from Samsung are most stable under any load, irrespective of the file size. The Maxtors are somewhat unsure working with very small files and in the FAT32 file system.

    So, among the reviewed devices, we recommend

    Maxtor drives for work with streaming video/audio content
    Hitachi and Western Digital for work with common Windows applications.
    Samsung’s be characterized as “universal”
    – they don’t seem to have any obvious weaknesses.
    Western Digital's new 160GB per-platter technology currently being rolled out in their Caviar, SE, and SE16 drive families.

    The introduction by Western Digital of their 160GB per-platter technology across the mainstream desktop product lines is occurring later than we had hoped, but we are finally seeing a wide selection of these drives in the retail market. What we look forward to is testing the new Western Digital SE16 WD5000AAKS series with the new three platter design to see how well the 160GB per-platter technology compares to the current high performance desktop 500GB offerings from Seagate, Samsung, and Hitachi.

    We expect this new drive will offer the improved thermals and acoustics of the 160GB drive while hopefully providing performance equal to or better than the venerable WD5000YS or Hitachi T7K500 drives.

    What is our recommendation? If you are looking for a very quiet drive with excellent thermals then the Western Digital Caviar SE WD1600AAJS should be on your short list, as long as capacity is not an issue.

    Our Western Digital and Maxtor 160GB samples are overall the quietest drives we have tested to date. Looking strictly at the acoustic and thermal benchmarks we definitely would recommend the Western Digital drive for a SFF or HTPC system.

    The drive also offered good game play performance and was able to make a competitive showing in the general business application benchmarks.

    The WD 1600AAJS is currently selling for around $60 in the OEM version which offers a three year warranty instead of the retail drive's one year warranty and increased cost of $85. We find this drive to be a better bargain than the Maxtor DiamondMax 17 160GB drive selling for the same price, but we will reserve our final recommendations until we have tested competing drives from Samsung and Hitachi.

    However, with 320GB drives selling around a $90 price point and newer 500GB drives available for $150 now, we see the market for these 160GB being limited to those on a strict budget.

    http://www.anandtech.com/printarticle.aspx?i=2920

    WD starting production of 160GB/Platter disks?
    http://forums.storagereview.net/inde...howtopic=23162
    Last edited by TZ; 04-05-2007 at 12:30 PM.

  3. #3
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    Lightbulb WD RAID Edition Enterprise Drive

    WD Caviar, RAID Edition 03 August 2004
    Today. Western Digital announces the Caviar -SB (PATA) and -SD (SATA)

    1) Manufacture to tighter tolerances for a higher net MTBF (WD claims 1 million hours)

    2) The introduction of "TLER," Time Limited Error Recovery, a paradigm that permits swifter recovery on detection of an error through acknowledgement and logging of the error as opposed to dropping the drive from the array (which necessitates a rebuild).

    It's important to note that with the Caviar RE, WD aims to capture enterprise backup, data management, and large-capacity, moderate-performance server markets where redundancy and effective error recovery are critical.

    WD's product spec sheet (pdf) - "this product is intended for server applications and is not recommended for use in desktop systems." More information may be found in WD's Press Release.

    WD 500GB SATA desktop drives
    Western Digital today announced it is shipping its new high-capacity 500GB Serial ATA (SATA-II) WD Caviar SE16 desktop-class hard drives. WD Caviar SE16 500 GB WD5000KS hard drives may be ordered for $350.

    The WD Caviar SE16 500GB drives. The new drive combines 4 125-gigabyte platters, 7,200 RPM performance with 300MB/s transfer rate, 16MB cache and Native Command Queuing (NCQ).

    The company said its WD hard drives are designed to have the lowest power consumption of any high-capacity desktop-class hard drive and that it has reduced WD Caviar drive noise levels to be "virtually imperceptible to the human ear" in home and business environments with its WhisperDrive and SoftSeek technologies (the latter streamlines read/write seeking algorithms).

    New up, a review from iXBT.com:
    WD Caviar RE2 WD4000YR and Caviar SE16 WD4000KD

    The benchmarks for WD5000YS and MaXLine Pro 500 are added to the SR Performance database here!

    500GB Roundup:
    http://www.storagereview.com/php/benchmark...9=319&devCnt=10

    Western Digital manufactures desktop edition hard drives and RAID Edition hard drives. Each type of hard drive is designed to work specifically in either a desktop computer environment or on RAID controller.

    If you install and use a desktop edition hard drive connected to a RAID controller, the drive may not work correctly. This is caused by the normal error recovery procedure that a desktop edition hard drive uses. If you install a RAID edition hard drive in a desktop computer, the computer system may report more errors than a normal desktop hard drive (due to the TLER feature which is enabled for reads only). Western Digital does not recommend installing RAID edition hard drives into a desktop computer environment. TLER cannot be disabled.

    However, there are no known problems using one in Mac Pro. On the other hand, there are problems using SE-series drives in RAIDs but none using RE/RE2 or Raptor in either setup.


    To updated the firmware on wd5000YS. I checked the TLER status after the firmware update with WDTLER and TLER is still disabled (both read and write) which is unchanged. New firmware version 09.02E09

    they list the following models only:
    * WD1600YS
    * WD2500YS
    * WD4000YS
    * WD5000YS

    having this problem and so need to re-flash the firmware.
    I'm not running RAID but if you are and running Windows, you definitely need to apply this firmware update. More details:

    http://www.theinquirer.org/default.aspx?article=37188
    WD Support firmware

    Western Digital Raptor & "YS" Series Drives - TLER

    "Although TLER is disabled by default, a utility is available from Western Digital to enable TLER." Wow, that was sure news to me! What "utility" was he talking about?

    TLER stands for Time Limited Error Recovery, which is a vital feature in RAID arrays. If you need to learn more about that feature, here's the link to Gary's review article: http://www.anandtech.com/storage/showdoc.aspx?i=2922.

    There is a separate setting for the "read" feature of TLER and the "write" feature of TLER. However, both setting are DISABLED from the factory on all Raptor drives, and can only be activated by using a utility.

    NOWHERE on the WD web site or in any of the WD literature is there any mention that TLER is disabled from the factory; so, obviously, a consumer would never have any way to know that it needed to be activated.

    Furthermore, this utility also works on the "YS" series of drives that are advertised by WD to be specifically for RAID usage. However, only the "read" TLER function is activated from the factory, and that the "write" function is disabled.

    Hitachi E7K500 or Western Digital WD5000AAKS?
    http://forums.storagereview.net/inde...howtopic=24472
    Last edited by TZ; 04-05-2007 at 01:24 PM.

  4. #4
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    Lightbulb WD4000YR / WD4000KD and WD Raptor

    Three drives, similar electronics. So, whatâs the difference between the WD4000YR and WD4000KD? [quote]

    1. First, the WD4000YR (that is, the ăRaid Edition 2ä) enjoys a 24-hour factory burn-in period versus the WD4000KD (the ăSpecial Edition 16ä)âs 8-hour test. The longer validation cycle increases the chances that a drive destined to suffer an ăinfant mortalityä of sorts is caught at the factory before it enters distribution.

    2. Next, the YR features a longer 5-year warranty more typical of enterprise-oriented drives such as WDâs own Raptor or Seagateâs Cheetah series rather than the shorter 3-year coverage that backs the KD.

    3. Finally, the RE2, living up to its moniker, ships with the firmâs ăTime Limited Error Recoveryä (TLER) feature enabled while the SE16 does not.

    The RE2 (and thus the SE16) shares a significant amount of electronics and parts in common with the 10K RPM Raptor family. Thus, the 400 GB SE16 comes equipped with a more conservative signaling scheme that limits its interface to 150 MB/sec rather than the 300 MB/sec found on the 250 GB SE16 (the Caviar WD2500KS). Remember, of course, that these are maximum rates- sustained rates from the drives themselves donât come close and really arenât limited by either of these figures.

    This leveraged technology between the RE2/SE16 and the Raptor leads WD to boldly proclaim that the WD4000YR can sustain use in a 24 hour a day, 7 day a week environment with its actuator seeking 100% of the time· the only such claim for any 7200 RPM drive on the market.

    Competing drives such the Seagate NL35 and Maxtor MaXLine Pro, while offering 24x7 power up, are more cautious in duty cycle (that is, seek) claims- ănearline duty loadsä for the Seagate and ă40%-50%ä for the Maxtor.

    WD claims a 1.2 million hour MTBF for the RE2 and a 600,000 hour MTBF for the SE16. Why the difference? Can weeding out drives that may prematurely fail with a burn-in period that runs 24 hours rather than 8 really account for such a difference? Probably not- much of this gap may be attributed to marketing. An SE16 is an RE2 that received less burn in time.

    Does this mean that the 400 GB Caviar SE16 should be able to handle the same strenuous duty cycle that WD claims for the RE2?
    SR WD4000YR

    Western Digital Caviar SE
    All drives (40GB up to 350GB) come with Data Lifeguard embedded error detection and repair features, which should automatically detect, isolate and repair problem areas that may develop over the extended use of the hard disk. BIOS Magazine
    Note: onboard G5 SATA problems with WD 400GB Drive - I've updated the previous page on WD4000GB/16MB cache Onboard G5 SATA Problems (and tests with SIIG SATA PCI card) to include another G5 owner's report on problems with that Western Digital drive. (He also reported using a PCI SATA controller helped.) - xlr8yourmac

    From www.xlr8yourmac.com:
    WD comments on G5 onboard SATA drive issues with WD4000KD

    Western Digital's support replied the following:
    "The drive on this controller cannot seem to handle more than 20 gig transfers at a time. The solution usually in such circumstances is to have updated drivers installed for the SATA controller. if the Serial ATA Hard Drive controller is using an older driver it could potentially be costing a little in the way of performance. Updating to the latest driver can potentially increase performance as well as work out compatibility problems between devices. To find the right driver to download, you first need to know what controller the HDD is connected to.
    No surprises there, they "blame" Apple. I do too, given the drive runs perfectly fine on another controller (Firmtek Seritek 1v4 in my case).

    WD FAQ: Desktop vs RAID version of drives
    Western Digital RAID edition hard drives have a feature called TLER (Time Limited Error Recovery) which stops the hard drive from entering into a deep recovery cycle. The hard drive will only spend 7 seconds to attempt to recover while attempting to read - not during writes. This means that the hard drive will not be dropped from a RAID array.

    If you install a RAID edition hard drive in a desktop computer, the computer system may report more errors than a normal desktop hard drive (due to the TLER feature). Western Digital does not recommend installing RAID edition hard drives into a (Windows) desktop computer environment.

    WD4000KD Jumper settings to disable SATA II mode -


    Owners of this drive have reported problems with it on the onboard SATA bus of the G5 (for instance with large file copies) - some solved the problem by using a PCI SATA controller. This weekend another G5 owner (new Quad) with this drive posted a report in the drive compat. database and mentioned using a jumper setting to disable SATA II mode when helped with a problem seen after initially adding the drive:

    "On both my quad G5s with the standard 250GB internal HD in the upper bay, I added a 400GB WD4000KD with 16MB cache. When I did that, the 250GB drive would not mount nor be seen. In Single User mode, I got an error message of sorts which said that the 250 GB drive was not "ready." After talking to WD, I added a jumper to the second from left position. This disabled SATA II (drive became SATA I) and also disabled CLQ. Of importance to me, the 250GB drive in the upper bay on both quads now mounted fine.

    One thing to keep in mind, I think, SATA-II with higher bandwidth saturation on PCs could be bad for older systems, and require more bandwidth (one of the problems with G4s that were affected by a 220MB/sec bus bandwidth).

    for writing — in the majority of cases, NCQ catastrophically conflicts with fine-tuned optimal algorithms of the classic lazy write in these drives with a large buffer; and the final write rate drops much with the appearance of a command queue.

    You can do only one thing to avoid it — disable NCQ support on the host controller, to which your WD drive is connected.

    But we should be fair - the WD4000YR and the WD4000KD with enabled NCQ act differently (that's still a mystery to me, considering their identical exteriors and firmware versions):

    professional WD4000YR acts according to its high status and loses write performance (still loses it ) from NCQ support much more rarely (and to a lesser degree) than its desktop counterpart (the latter sometimes "dies" in case of NCQ support and a command queue for writing).

    WD Caviar RE2 WD4000YR and Caviar SE16 WD4000KD

    This article is a good tutorial on the inner workings of today's SATA drive and how NCQ is implemented and affects performance, especially in writing.

    There was no perceptible change in copy speed with the jumper in pace, averaged 40MB/sec.
    ... Does the WD Caviar SE16 drives have SSC disabled by default? Perhaps, hopefully, 10.4.4 could help address these and similar issues?
    Last edited by TZ; 04-05-2007 at 01:07 PM.

  5. #5
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    Lightbulb WD Raptor

    WD 150GB Raptor. This new model, named WD1500AD, will have a storage capacity of 150GB, 16MB of cache and will be compatible with SATA II format.

    Raptor-X WD1500AH (WD1500AHFD) = Gamer version
    # Native Command Queuing (NCQ) increases data transfer in high-performance multi-processor, multi-threaded environments.

    # Rotary Acceleration Feed Forward (RAFF ) optimizes operation and performance when drives are used in vibration-prone multi-drive systems. Patent pending.
    Raptor X AHFD $329 (desktop, not intended, according to WD, for RAID?)

    WD1500AD (WD1500ADFD) = Server version
    # Reliable designed and manufactured to enterprise-class standards to provide enterprise reliability in high duty cycle environments. With 1.2 million hours MTBF, these drives have the highest available reliability rating on a high-capacity drive.

    # Fast with a next-generation SATA interface, 1.5 Gb/s data transfer rate, native command queuing (NCQ), and 16 MB cache, these drives deliver optimum performance.

    # RAID-specific, time-limited error recovery (TLER) a feature unique to WD, prevents drive fallout caused by the extended hard drive error-recovery processes common to desktop drives.

    # Rotary Acceleration Feed Forward (RAFF™) optimizes operation and performance when the drives are used in vibration-prone, multidrive systems such as rack-mounted servers or network storage.

    # FlexPower connector technology that accepts power from either industry-standard or new SATA power supplies.

    # Applications - Servers, network attached storage, scientific computing, video surveillance, enterprise backup, document and image management, digital video.
    Raptor ADFD (RAID model)

    Techreport compares latest Raptor to other SATA drives

    G5 Support - "The Apple G5 tower does not support certain standard Serial ATA interface protocols used by the WD4000YR, WD4000KD, WD1500AHFD, and WD1500ADFD hard drives resulting in an interface lock-up. This causes the computer system to hang. The only work-around we have identified at this time is installing a SATA Host Bus Adapter (controller card), effectively circumventing the on-board interface." WD FAQ: Apple G5

    WD Press Release
    StorageReview WD Raptor 10K 150

    The 4th iteration of 74GB Raptor compared to current top drives Storage Review Raptor
    TechReport Review RaptorX
    Update: Comparing DM10 300GB vs 10K Raptor 150GB
    Article concerning the test of the Raptor 150 :
    http://www.hardmac.com/articles/55/

    150GB version on native SATA ports of G5 dual/quad-core systems.
    Onboard G5 SATA Problem report - AYM

    Silent PC review: WD Raptor 150GB noise levels

    Raptor WD740GD versus WD740ADFD: farewell of Marvell bridge

    WD Knowledge Base FAQ
    Is my Apple G5 Tower compatible with the WD4000YR, WD4000KD, WD1500AHFD, and WD1500ADFD hard drives?
    _______________
    MacGurus: WD 150GB Raptor:
    http://www.macgurus.com/forums/showthread.php?t=21541
    Raptor safe to use?
    http://www.macgurus.com/forums/showthread.php?t=21991
    Quad and 150GB:
    http://www.macgurus.com/forums/showp...4&postcount=20
    MacGurus WD 10K Raptor 150GB
    Poll: 150GB Raptor - G5 Compatibility
    ______________
    Apple Discussions:
    WD 150 Raptor - Safe to use?
    WD Raptor 10K 150GB - Will this work?
    WD Raptor 150GB in Mac Pro?

    Raptor 36 And 74 Updated
    http://www.hardmac.com/news/2006-05-30/#5550

    Western Digital has decided to update its entry level models to align them with its recently released Raptor 150.

    - Larger cache 16 MB.
    - NCQ (Native Command Queuing) is now supported.
    - disk speed: from 72 to 84MB/s
    - HS access timing reduced by 0.1ms
    - noise level reduced from 32 to 29 dB.

    Hardmac tests the Raptor 150
    http://www.hardmac.com/articles/55/
    First test of the Raptor150 in a PMG5 Quad (no problems noted)

    PCI/PCI-X G5s will have problems with the new Raptor, while PCI-Express Dual and Quad Core G5 will be able to use native SATA bus.

    Anandtech: WD 10K Raptor:
    http://www.anandtech.com/storage/showdoc.aspx?i=2922

    the Caviar WD740GD still lacks accompanying controllers that would presumably elevate it to competitive status in server applications through the enabling of tagged command queuing. Thus, those seeking a drive for a server that routinely exceeds light to medium loads should remain focused on more mature, proven SCSI solutions.

    Ironically, despite the inclusion of command queuing and the associated promise of better multi-user performance, the WD740GD follows in the footsteps of its predecessor. The WD360GD won over many fans in the enthusiast/gaming community thanks to its outstanding single-user performance.

    Raptor Review

    Unfortunately, as great as the WD740GD is in single-user applications, the drive doesn't scale nearly as well as 10K RPM SCSI disks under multi-user loads. The WD740GD's tagged command queuing support should help boost multi-user performance, but this capability won't be tapped until controller cards arrive with TCQ support.
    http://techreport.com/onearticle.x/6390
    Last edited by TZ; 04-05-2007 at 12:59 PM.

  6. #6
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    Lightbulb Western Digital's Caviar SE16-AAKS

    Western Digital's latest Caviar SE16 features IntelliSeek, a just-in-time approach to actuator movement that is supposed to not only lower power consumption but also reduce noise levels by minimizing seek-induced vibration. WD claims these gains are accomplished without slowing seek times, which bodes well for the Caviar's appeal among enthusiasts who demand that power savings not come at the expense of performance.

    Western Digital has also given the drive a much-needed capacity boost up to 750GB courtesy of four perpendicular-packed platters, and they've fiddled with the internals to improve reliability.

    Hard drive manufacturers can't seem to agree on a collection of consistent specifications to publish, so we're left comparing the 750GB Caviar SE16—model number WD7500AAKS—to its 500GB predecessor, the WD5000KS.

    Conclusions
    7,200-RPM hard drives are usually split between camps that excel at sequential transfers and those that prefer more randomized access patterns. The Caviar SE16 750GB is different, though, because it doesn't seem to care what you throw at it.

    In HD Tach and FC-Test, which stretch drives with sustained, sequential transfers, the Caviar easily dominated its competition. And although it didn't top the podium with the randomized access patterns of our iPEAK and IOMeter tests, the SE16 spent most of its time at the front of the 7,200-RPM field in those tests. Don't forget the drive's pack-leading WorldBench performance or its quick boot and load times, either.

    If Western Digital's latest Caviar does have a preference, it seems particularly adept at performing sequential read operations, as our HD Tach and FC-Test results can attest.

    Interestingly, this blistering sequential read performance appears to come somewhat at the expense of random read performance in IOMeter's read-dominated web server test pattern or a couple of our iPEAK workloads that are heavy on read ops.
    Last edited by TZ; 06-15-2007 at 05:07 AM.

  7. #7
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    Lightbulb Raptor

    WD 150GB Raptor. This new model, named WD1500AD, will have a storage capacity of 150GB, 16MB of cache and will be compatible with SATA II format.

    Raptor-X WD1500AH (WD1500AHFD) = Gamer version
    # Native Command Queuing (NCQ) increases data transfer in high-performance multi-processor, multi-threaded environments.

    # Rotary Acceleration Feed Forward (RAFF ) optimizes operation and performance when drives are used in vibration-prone multi-drive systems. Patent pending.
    Raptor X AHFD $329 (desktop, not intended, according to WD, for RAID?)

    WD1500AD (WD1500ADFD) = Server version
    # Reliable designed and manufactured to enterprise-class standards to provide enterprise reliability in high duty cycle environments. With 1.2 million hours MTBF, these drives have the highest available reliability rating on a high-capacity drive.

    # Fast with a next-generation SATA interface, 1.5 Gb/s data transfer rate, native command queuing (NCQ), and 16 MB cache, these drives deliver optimum performance.

    # RAID-specific, time-limited error recovery (TLER) a feature unique to WD, prevents drive fallout caused by the extended hard drive error-recovery processes common to desktop drives.

    # Rotary Acceleration Feed Forward (RAFF™) optimizes operation and performance when the drives are used in vibration-prone, multidrive systems such as rack-mounted servers or network storage.

    # FlexPower connector technology that accepts power from either industry-standard or new SATA power supplies.

    # Applications - Servers, network attached storage, scientific computing, video surveillance, enterprise backup, document and image management, digital video.
    Raptor ADFD (RAID model)

    Techreport compares latest Raptor to other SATA drives

    G5 Support - "The Apple G5 tower does not support certain standard Serial ATA interface protocols used by the WD4000YR, WD4000KD, WD1500AHFD, and WD1500ADFD hard drives resulting in an interface lock-up. This causes the computer system to hang. The only work-around we have identified at this time is installing a SATA Host Bus Adapter (controller card), effectively circumventing the on-board interface." WD FAQ: Apple G5

    WD Press Release
    StorageReview WD Raptor 10K 150

    The 4th iteration of 74GB Raptor compared to current top drives Storage Review Raptor
    TechReport Review RaptorX
    Update: Comparing DM10 300GB vs 10K Raptor 150GB
    Article concerning the test of the Raptor 150 :
    http://www.hardmac.com/articles/55/

    150GB version on native SATA ports of G5 dual/quad-core systems.
    Onboard G5 SATA Problem report - AYM

    Silent PC review: WD Raptor 150GB noise levels

    Raptor WD740GD versus WD740ADFD: farewell of Marvell bridge

    WD Knowledge Base FAQ
    Is my Apple G5 Tower compatible with the WD4000YR, WD4000KD, WD1500AHFD, and WD1500ADFD hard drives?
    _______________
    MacGurus: WD 150GB Raptor:
    http://www.macgurus.com/forums/showthread.php?t=21541
    Raptor safe to use?
    http://www.macgurus.com/forums/showthread.php?t=21991
    Quad and 150GB:
    http://www.macgurus.com/forums/showp...4&postcount=20
    MacGurus WD 10K Raptor 150GB
    Poll: 150GB Raptor - G5 Compatibility
    ______________
    Apple Discussions:
    WD 150 Raptor - Safe to use?
    WD Raptor 10K 150GB - Will this work?
    WD Raptor 150GB in Mac Pro?

    Raptor 36 And 74 Updated
    http://www.hardmac.com/news/2006-05-30/#5550

    Western Digital has decided to update its entry level models to align them with its recently released Raptor 150.

    - Larger cache 16 MB.
    - NCQ (Native Command Queuing) is now supported.
    - disk speed: from 72 to 84MB/s
    - HS access timing reduced by 0.1ms
    - noise level reduced from 32 to 29 dB.

    Hardmac tests the Raptor 150
    http://www.hardmac.com/articles/55/
    First test of the Raptor150 in a PMG5 Quad (no problems noted)

    PCI/PCI-X G5s will have problems with the new Raptor, while PCI-Express Dual and Quad Core G5 will be able to use native SATA bus.

    Anandtech: WD 10K Raptor:
    http://www.anandtech.com/storage/showdoc.aspx?i=2922

    the Caviar WD740GD still lacks accompanying controllers that would presumably elevate it to competitive status in server applications through the enabling of tagged command queuing. Thus, those seeking a drive for a server that routinely exceeds light to medium loads should remain focused on more mature, proven SCSI solutions.

    Ironically, despite the inclusion of command queuing and the associated promise of better multi-user performance, the WD740GD follows in the footsteps of its predecessor. The WD360GD won over many fans in the enthusiast/gaming community thanks to its outstanding single-user performance.

    Raptor Review

    Unfortunately, as great as the WD740GD is in single-user applications, the drive doesn't scale nearly as well as 10K RPM SCSI disks under multi-user loads. The WD740GD's tagged command queuing support should help boost multi-user performance, but this capability won't be tapped until controller cards arrive with TCQ support.
    http://techreport.com/onearticle.x/6390

    The OLDER WD740GD-00FLC0 Raptor model works on all G5s.
    It came out in Nov 2003 and was discontinued a year ago.

    WD's Product List
    WD740GD PDF
    Legacy Raptor

    The only difference I know of between the 74 and 150GB ADFD are:
    the number of platters and the older Raptor had legacy power connector, the ADHD does not.

    Quad and Dual-Core G5 can use the 150GB ADFD.
    the Raptor is not 300MB/sec (no need and WD wanted to stick with 'tried and true.'
    SATA II includes NCQ and other features as well.
    The original Raptors used TCQ (which hardly anyone supported).

    It is "ADFD" which is not supported on G5, {and have 16MB cache) will not work when installed into a Power Macintosh G5 system without using a separate SATA controller card.
    See this Western Digital technote for more information.
    Does not distinguish between DC/Quad core G5s and older "single core" PCI/PCI-X models.

    Drive Upgrade DB
    http://www.xlr8yourmac.com
    and find folks using the ADFD model, fine.
    Mike posted WD's note, and even though "tons" of G5 Quad owners use the ADHD 150GB without problem, and in a survey, refused to qualify or "question" WD's blanket statement of no G5 support.

    For reference: StorageReview Drive Performance DB: Raptor

    http://www.anandtech.com/storage/showdoc.aspx?i=2101

  8. #8
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    Lightbulb Western Digital MyBook

    MyBook

    The fix is to never install the software that WD includes with the MyBook drives, including the kext that enables the "pie chart" function of the front LEDs. In addition to being buggy, the kext makes the LEDs about twice as bright and I found them to be very distracting as the drives sit next to my display.

    In general as long as the OS supports a device without any special drivers, I don't install them. The MyBook drives don't need them.

    The Maxtor 1-touch III drives DO require a driver which is why I returned them and got the WD instead. Without the driver the Maxtors spin down and will never start up without pulling the Firewire and plugging it back in again. Maxtor support was worthless.

    The WD Backup utility also pretty much blows. I use SuperDuper.
    Despite the crappy software, the Pro version of the drives are really solid.
    ______________
    MyBook drives can interfere with the SuperDrive detecting disk insertion.
    After some Google searching, I discovered that it was a problem for a lot of people:
    http://forums.macosxhints.com/showthread.php?p=385008

    I also went to the Apple link referenced on that page:
    http://discussions.apple.com/thread....sageID=4343400

    Those pages didn't help me. I don't have the WD daemon claimed to be the culprit, or at least nothing in my Macintosh HD/Library/LaunchDaemons folder.
    I wrote WD tech support about it and have yet to hear back from them.
    _________________

    I have a brace of these added to a 101% stock system and have none of the issues referred to.

    All I did was follow the formatting instructions and I later added the Button Manager because I started to see inconsistencies in mounting behaviour generally. Since then I've been good-to-go.

  9. #9
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    Lightbulb Time-Limited Error Recovery

    Q: What is time-limited error recovery and why do I need it?

    A: Desktop drives are designed to protect and recover data, at times pausing for as much as a few minutes to make sure that data is recovered. Inside a RAID system, where the RAID controller handles error recovery, the drive needn't pause for extended periods to recover data. In fact, heroic error recovery attempts can cause a RAID system to drop a drive out of the array. WD RE2 is engineered to prevent hard drive error recovery fallout by limiting the drive's error recovery time. With error recovery factory set to seven seconds, the drive has time to attempt a recovery, allow the RAID controller to log the error, and still stay online.

  10. #10
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  11. #11
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    Lightbulb Caviar SE16 WD7500AAKS

    WD's newest Caviar SE16 WD7500AAKS

    It joins products already shipping from Seagate (the 750 GB Barracuda 7200.10) Both drives weigh in at 698.6 binary GB; and Hitachi (the terabyte Deskstar 7K1000).

    Western Digital Caviar SE16 WD7500AAKS Review

  12. #12
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    Lightbulb Wd 750 Gb

    Western Digital SE16 750GB: "Quiet" a Performer
    The WD7500AAKS scored some of the highest marks we've ever seen on some of the synthetic tests in the general desktop product sector. While the synthetic portion of the benchmarks are of arguably less value than the real world tests, the fact that this drive scores as well as it does gives it additional bragging rights in a market becoming increasingly crowded with similarly-performing hardware.

    Real-world performance of the drive was excellent as well. We expected the Raptor to trounce the WD7500AAKS in all benchmarks, but we didn't expect the large differential between this drive and the Seagate drive. Considering these two drives are targeted at the same market space, Western Digital has a clearly superior product this time around. The iPEAK gaming performance in particular was an area where the WD7500AAKS excelled, often approaching (and occasionally beating) the WD Raptor due to excellent sustained transfer rates.

    The drive's thermal performance, while nothing to boast about, is certainly above average, particularly given the capacity. The idle temperature of the drive sat squarely in the middle of our tests, but the drive truly shines with its fully-loaded heat increase of only 12%. This made it the coolest 750GB drive we've tested by a wide margin, and even gave the Samsung T166 (our current thermal champion) a run for its money. Noise, too, was a pleasant area of surprise for this drive, making this a suitable offering for even a HTPC setup.
    WD Extends the RE2

    Augmenting its consumer-oriented 750-gig offering, WD today takes the wrap off of the RE2 WD7500AYYS. Like the Caviar SE16, the RE2 offers 750 gigabytes of capacity spec'ed with an 8.9 ms seek time, 16 MB buffer, 3.0 Gb/sec interface, and NCQ.

    Western Digital intros 750GB Caviar RE2 hard drive.
    Roughly a month and a half have passed since Western Digital introduced a 750GB version of its popular Caviar SE16 desktop hard drive. We had a chance to review the new model back in mid-June, and now Western Digital has unveiled a new version of the same drive meant to cater to the enterprise market.

    The new 750GB Caviar RE2 has the same 7200RPM spindle speed, 16MB of cache, and support for 300MB/s Serial ATA transfer speeds with Native Command Queuing as the 750GB Caviar SE16.

    However, the RE2 is tuned for operation in RAID arrays, it's covered by a five-year warranty, and it's rated for a mean time between failures of 1.2 million hours. For reference, the SE16 is only covered by a three-year warranty. Western Digital says the suggested retail price for the 750GB Caviar RE2 is $265, which is about $65 more than the 750GB Caviar SE16.

    WD ANNOUNCES 750 GB ENTERPRISE-CLASS SATA HARD DRIVES
    WD RE2 750 GB Hard Drives Deliver Cool, Fast, Reliable High-Capacity Performance

    LAKE FOREST, Calif. - July 17, 2007 - Addressing the needs for the growing enterprise market for high-capacity, highly-reliable storage, Western Digital Corp. (NYSE: WDC) today announced it will be shipping its WD RE2 (RAID Edition) 750 GB hard drive this month. With 3.0 Gb/s data transfer rate, WD RE2 hard drives feature Native Command Queuing (NCQ) and 16 MB cache for high system performance.

    http://www.wdc.com/en/products/Products.asp?DriveID=335
    Last edited by TZ; 08-09-2007 at 08:35 AM.

  13. #13
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    Lightbulb WD's first terabyte drive

    WD's Green Terabyte

    Posted July 23rd, 2007 by eugene

    WD's first terabyte drive - The firm today introduces its "GP" (GreenPower) series of drives. Pointing out that CPU manufacturers have shied away from brandishing specs such as gigahertz, WD likewise is quite coy about the traditional specs associated with hard drives when it comes to the GP.

    The one spec the manufacturer is willing to trumpet is power consumption. The firm claims its GP drives will save a full 4-5 watts over standard 7200 RPM drives both when idle and when seeking... delivering not only reduced power consumption itself, but also of course reductions in associated heat and noise.

    WD also states that such savings should come with a relatively minimal hit to application-level performance.

    Given the solid performance exhibited by the firm's 5400 RPM Scorpio when contrasted with some 7200 RPM competition, the claim might not be that far-fetched.

    WD’S NEW GREENPOWER™ HARD DRIVES REDUCE ENERGY CONSUMPTION, HELPING PROTECT THE ENVIRONMENT

    Company’s First One Terabyte Drive Enables Up To 40% Hard Drive Power Savings for Desktop, Enterprise, CE and WD Branded Customers

  14. #14
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    Lightbulb New level random and sustained I/O

    Thanks to Barefeats for the heads up:

    the new 750GB Western Digital Caviar SE16 drive is the surprising new Speed King among 7200rm SATA drives for both random and sustained transfers (based on QB4)

    Furthermore, if you don't need the full 1000GB, the Western Digital 750GB Caviar is selling for about half as much as the Hitachi 7K1000

  15. #15
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    Lightbulb WD Caviar SE16

    QuickBench(TM) 4.0 Test Results
    2000-2007 Intech Software Corp.

    2 x 500GB WD Caviar SE16
    Test Volume Name: Mac Pro System
    Test Volume Type: MacOS Extended
    Test Volume Size: 200 Gigabytes
    Test Volume Free Space: 122.562 Gigabytes
    Allow Disk Cache Effects: Enabled
    Read Cache Delay: 5 milliseconds
    Write Cache Delay: 5 milliseconds
    All reads and writes performed asychronously

    Extended Test Results
    Code:
    (Cycles: 5)
           	 Read 	Write
     20 MB	158.602	151.337
     30 MB	153.664	157.504
     40 MB	153.822	152.852
     50 MB	152.366	152.352
     60 MB	158.084	157.788
     70 MB	159.724	159.056
     80 MB	153.374	153.101
     90 MB	143.715	142.348
    100 MB	154.042	150.976
    
    Ext Ave	154.155	153.035

  16. #16
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    Lightbulb WD Caviar RE2 750GB

    And the WD Caviar RE2 750GB is reviewed here -
    http://techreport.com/articles.x/13253

    Terabyte model is here:
    http://www.westerndigital.com/en/pro...sp?DriveID=336

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