SAS vs. SATA HHD in Xserve

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

  1. macrumors newbie

    Joined:
    Jun 10, 2008
    Location:
    Copenhagen
    #1
    Hello

    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
    FTP/IT-Technician
    Fridthjof Film
     
  2. macrumors 6502

    Joined:
    Jun 14, 2006
    Location:
    Suburb of Chicago
    #2
    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

    drlunanerd

    Joined:
    Feb 14, 2004
    Location:
    UK
    #3
    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

    Joined:
    Jul 21, 2007
    Location:
    Austin, TX USA
    #4
    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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