View Full Version : Photoshop Scratch Disk query

06-24-2006, 12:49 PM
Hi all,

I'm a retoucher migrating from a Mac G4 MDD (Dual1 Ghx, 1.7 GB RAM, 2 x 80 GB Drives) to a G5 2.3 GB Dual Core (6.5 GB RAM, 1 x 250GB Drive). I work primarily in packaging sometimes generating layered Photoshop files from 600 - 800 MB. I use CS2 in OS 10.4.6. I'm thinking I'd still need a fast scratch disk (don't want to mess with RAIDs) as I bought this Mac as a stop gap measure until the new Intel Desktop Macs are released and mature with a Universal binary CS3.

I've read many people like the WD Raptors, but I understand the new versions of these sport a SATA2 interfeace and some say they won't work reliably on Apples SATA1 bus. Could any of you comment about an older 8mb cache version of the 74GB Raptor? I have read others however which say they've used the new 16 MB cache drives OK.

Thanks for your input,


06-24-2006, 01:20 PM
Visit the SATA Forum and look at the WD Raptor threads (http://www.macgurus.com/forums/showthread.php?t=21541) and also here (http://www.macgurus.com/forums/showthread.php?t=21991) and G5 Forum (http://www.macgurus.com/forums/showthread.php?t=22204) poll. I don't know anyone that has a DC/Quad that has found the Raptor 150 FAQ (http://www.macgurus.com/forums/showpost.php?p=96239&postcount=60) would not work.

There hasn't been any problems using the new Raptor on Dual Core G5s, they seem to have an update SATA specification. PCI-X G5s are another story. WD's other drives (and Seagate's) need to have SATA II turned off as they don't auto-negotiate down to 1.0 as they should.

I can point to problems with almost any make and model drive though currently or in the past year. SATA Drive FAQ (http://www.macgurus.com/forums/showthread.php?t=12233)

Why not RAID? I think that is one area where you can take it with you. Any investment in SATA drives would still help. And if not RAID, then you might want to see if you need more than 6.5GB RAM. One member seemed to fell that his work with files up to 1GB demanded 10-12GB RAM and the fastest SCSI RAID possible. We have one moderator's G5 2.7DP (http://www.macgurus.com/forums/showthread.php?t=20455) that built a 12 drive array of mixed SATA Raptors and 15K Atlas (SCSI) drives to achieve nearly 800MB/sec.

Storage Review thinks very highly of the Hitachi 7K500/500GB drive's performance.

You might want to use the photoshop test utility to help gauge your setup.
Photoshop Acceleration Basics (http://homepage.mac.com/boots911/.Public/PhotoshopAccelerationBasics2.3.pdf)

If you haven't already bought the G5 and are still in the "planning stage" I would reconsider the Quad and look on the Apple Store Specials page.

Refurbished Power Mac G5 Quad 2.5GHz
Two dual-core 2.5GHz PowerPC G5 processors
512MB of 533MHz DDR2 SDRAM (PC2-4200)
250GB Serial ATA hard drive
16x SuperDrive (double-layer)
NVIDIA GeForce 6600 with 256MB GDDR SDRAM
• Save 16% off the original price
Original price: $3,299.00
Your price: $2,799.00

Apple Specials (http://store.apple.com/1-800-MY-APPLE/WebObjects/AppleStore?family=Certified&siteID=JWU6hEpoB3Q-RP0K8FGGwJGu3XduQi4WTw)