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marf Bipolar (III) Inmate From: Canada Insane since: Oct 2001	posted 12-27-2002 18:44 Hello, I just got new HD for christmas. WD400JB (WEstern Digital 40GB) and I put my old one as secondary (Maxtor 15 GB). Now I put my OS on the 40 GB because its 7200 RPM, and I installed Photoshop on it. Now it says thet the screatch disks are better to be on a seperate hard drive. So in PS I went to Edit>Preferences>Plugins & Scratch Disks. Then under scratch Disks there is 5 Options. The first was set to Startup. I changed it to d:\ (being my secondary HD), and I put the second scratch disk to d:\ also. My question is that How much Virtual memory does a scratch Disk Take Up? Should I put all 5 to d:\ or is One or 2 scratch Disks sufficient?? Thanks Marf
OlssonE Maniac (V) Inmate From: Eagleshieldsbay, Sweden Insane since: Nov 2001	posted 12-27-2002 20:38 This might make somethings clearer: quote: When your system does not have enough RAM to perform an operation, Photoshop and ImageReady use a proprietary virtual memory technology, also called scratch disks. A scratch disk is any drive or a partition of a drive with free memory. By default, Photoshop and ImageReady use the hard drive that the operating system is installed on as its primary scratch disk. You can change the primary scratch disk and, in Photoshop, designate a second, third, or fourth scratch disk to be used when the primary disk is full. Your primary scratch disk should be your fastest hard disk, and should have plenty of defragmented space available. The following guidelines can help you assign scratch disks: * For best performance, scratch disks should be on a different drive than any large files you are editing. * Scratch disks should be on a different drive than the one used for virtual memory. * Scratch disks should be on a local drive. That is, they should not be accessed over a network. * Scratch disks should be conventional (non-removable) media. * Raid disks/disk arrays are good choices for dedicated scratch disk volumes. * Drives with scratch disks should be defragmented regularly. /OlssonE [This message has been edited by OlssonE (edited 12-28-2002).]
marf Bipolar (III) Inmate From: Canada Insane since: Oct 2001	posted 12-30-2002 22:10 thanks, very helpful info
Dracusis Maniac (V) Inmate From: Brisbane, Australia Insane since: Apr 2001	posted 12-31-2002 05:49 Yup, I have my old HDD as a PS scratch disk. It's an old 1.6 Gig 7200... Although I don't store any data on that drive it does fill pretty quickly. Even working with smallish files (800x600) It'll usually fill up and start using one of my other drives after about a half hours worth of stuffing around. I definatly need a bigger one as I find myself doing more work for print and well, 1.6 gig of scratch space gets eaten up in around 5 minuites when I'm doing something as small an A5 flyer @ 300 dpi.

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marf
Bipolar (III) Inmate

From: Canada
Insane since: Oct 2001

posted 12-27-2002 18:44

Hello,
I just got new HD for christmas. WD400JB (WEstern Digital 40GB)
and I put my old one as secondary (Maxtor 15 GB). Now I put my OS on the 40 GB because its 7200 RPM, and I installed Photoshop on it. Now it says thet the screatch disks are better to be on a seperate hard drive. So in PS I went to Edit>Preferences>Plugins & Scratch Disks. Then under scratch Disks there is 5 Options. The first was set to Startup. I changed it to d:\ (being my secondary HD), and I put the second scratch disk to d:\ also.
My question is that How much Virtual memory does a scratch Disk Take Up? Should I put all 5 to d:\ or is One or 2 scratch Disks sufficient??

Thanks

Marf

OlssonE
Maniac (V) Inmate

From: Eagleshieldsbay, Sweden
Insane since: Nov 2001

posted 12-27-2002 20:38

This might make somethings clearer:

quote:
When your system does not have enough RAM to perform an operation, Photoshop and ImageReady use a proprietary virtual memory technology, also called scratch disks. A scratch disk is any drive or a partition of a drive with free memory. By default, Photoshop and ImageReady use the hard drive that the operating system is installed on as its primary scratch disk.

You can change the primary scratch disk and, in Photoshop, designate a second, third, or fourth scratch disk to be used when the primary disk is full. Your primary scratch disk should be your fastest hard disk, and should have plenty of defragmented space available.

The following guidelines can help you assign scratch disks:

* For best performance, scratch disks should be on a different drive than any large files you are editing.
* Scratch disks should be on a different drive than the one used for virtual memory.
* Scratch disks should be on a local drive. That is, they should not be accessed over a network.
* Scratch disks should be conventional (non-removable) media.
* Raid disks/disk arrays are good choices for dedicated scratch disk volumes.
* Drives with scratch disks should be defragmented regularly.

/OlssonE

[This message has been edited by OlssonE (edited 12-28-2002).]

marf
Bipolar (III) Inmate

From: Canada
Insane since: Oct 2001

posted 12-30-2002 22:10

thanks, very helpful info

Dracusis
Maniac (V) Inmate

From: Brisbane, Australia
Insane since: Apr 2001

posted 12-31-2002 05:49

Yup, I have my old HDD as a PS scratch disk. It's an old 1.6 Gig 7200... Although I don't store any data on that drive it does fill pretty quickly. Even working with smallish files (800x600) It'll usually fill up and start using one of my other drives after about a half hours worth of stuffing around.

I definatly need a bigger one as I find myself doing more work for print and well, 1.6 gig of scratch space gets eaten up in around 5 minuites when I'm doing something as small an A5 flyer @ 300 dpi.