How best to set up a scratch disk for photoshop?

Discussion in 'Mac Apps and Mac App Store' started by Fiercehairdo, May 24, 2009.

  1. macrumors member

    Dec 19, 2007

    I have a new mac pro with 4 int hard drives (the original boot drive and 3 x 1TB int hard drives).

    How should I configure the the drives for photoshop scratch disk?

    I intend to have the three int hard drives as a single striped RAID for all my data storage. Can I use the data storage RAID as the scratch disk or is it bad practice to have thesame disks that I'm storing files on as the scratch disk?

    Should I have a dedicated internal disk as a scratch disk?

    Or, will an external HD connected via a eSATA port be adequate for a scratch disk?

  2. macrumors 603

    Oct 22, 2007
    An Island in the Salish Sea
    Congratulations on your new MP! I found this site(Mac Performance Guide) to be invaluable. Its not actually loading for me at the time, ... I hope its a temporary glitch at their end. Full of advice on how to optimize your Mac Pro, scratch disks, optimize Photoshop, etc. I've started with its suggestions, and have seen some speed gains. More memory arrives next Monday or Tuesday, and I should see more yet.

  3. macrumors 65816

    Aug 1, 2007
    Yes it's bad practice to have the same drive for scratch and for data.

    It's also bad practice to have all data stored on a 3 drive stripe unless you have a very good backup system in place.

    Is there a reason you need the striped array?

    The link above is a good one.

    external drives are not the best choice for scratch, unless eSATA.
  4. thread starter macrumors member

    Dec 19, 2007
    I would like the striped array for speed and efficiency purposes. As I understand it, saving, opening and general disk activity will be much faster on a striped array - is that correct?

    I intend to have hourly or at least daily back ups of all the work on the RAID array to external hard drives.

    I have a Sonnet Tempo E4P SATA card installed so I thought I could have the Ps scratch disk on an external disk or external disk array thereby freeing up all my internal disks (3 1TB disks not including the Boot drive which I will only use for apps) for the data storage array.

    Any comments on this plan are most welcome...
  5. macrumors G4

    Jan 5, 2006
    Redondo Beach, California

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