Fragmentation. Short stroking the drives and RAIDing.
sngraphics: you *can* use the same volume for both scratch and work, but I would advise against it: it will create unnecessary file fragmentation on the volume, slowing everything down. Don't create a fast RAID only to use it in a manner that will slow it down...
Thanks for your responses.
About "create unnecessary file fragmentation".
Will using the volume for working files create the fragmentation or using it as a scratch create the fragmentation?
Or using the one volume for both?
And would the fragmentation affect the performance of Photoshop using it as the scratch?
About short stroking the drives and RAIDing.
Would I create the smaller partitions on each drive first and RAID them together to create
the Scratch volume and then RAID the larger partitions together to create the working volume?
OR
Would I create one large 6TB RAID (3x2TB) and then partition that volume into one small for scratch and one large for working files?
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Short answer: Just get more RAM.
Long answer: What is your setup now for RAM, Size of files your working with, CS version, Are you getting pages out when you monitor it from Activity Monitor?
I believe I have enough RAM.
I have 32GB (4x8GB) of OWC RAM.
I am using CS5 and have assigned 70% of the RAM to Photoshop in PS preferences.
My Photoshop files are about 500MB to a few GB.
If I have only one or two files open I do not get page outs.
But when I have many open (over 10) plus have other apps running then page outs begin and sometimes are pretty heavy.
One quick question, Could having a lot of Safari tabs open at once cause more page outs? (over 100 tabs)