SAS vs. SATA HHD in Xserve

Discussion in 'Mac OS X Server, Xserve, and Networking' started by tzidore, Jun 11, 2008.

  1. macrumors newbie

    Jun 10, 2008

    I'm going to set up a Xserve with 15-30 home directories using OpenDirectory. I would like to have a lot of disc space, but the stability and smoothness is a must.

    Is it necessary to buy SAS drives when I only have between 15-30 directories?

    Kind Regards
    Tino Zidore
    Fridthjof Film
  2. macrumors 6502

    Jun 14, 2006
    Suburb of Chicago
    It all depends on which has a higher priority: disk space or performance.

    As long as all the home directories are not being used simultaneously, SATA with RAID 5 or whatever you fancy for redundancy should handle perfectly fine.

    It sounds like SAS would be overkill in this situation. (Pun not initially intended.)
  3. macrumors 65816


    Feb 14, 2004
    I'm in a similar situation - am speccing a server up and have to choose between SAS and SATA. I've only ever used SCSI-flavour disks in servers, but really SATA looks compelling now on a price-performance-capacity matrix. SAS drives are piddly little things and once you've added RAID into the equation is it going to make much real-world difference comparing their 10k or 15K rpm speed to 7.2k SATA if you're not running a datacentre?

    Also the vendor is being naughty and only giving a 1 year warranty on the SATA drives compared to 3 years for SAS. They obviously really want you to cough up and spec the SAS!
  4. macrumors 6502


    Jul 21, 2007
    Austin, TX USA
    For all intents and purposes, treat SAS as regular (i.e. parallel) SCSI when comparing to SATA.

    SAS ~is~ SCSI. Use it where higher IOPs are required, higher reliability, or heavy multithreaded use. SATA is better suited to archive/fileshares if the IOPs requirements are about 1/2 that of your apps that need SAS.

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