Need Raid help

Discussion in 'Mac Basics and Help' started by pamcam, Sep 5, 2008.

  1. pamcam macrumors newbie

    Sep 5, 2008
    I have two external Oxford hard drives in a single firewire case that were set up as raid slices a couple of years ago. Now when I hook them into my computer (Mac OS 10.5.4), they do not appear in the finder. If I go to disk utility, they are there, but I can't do anything with them. It gives me the option to convert from raid set version 1.0 to 2.0, but when I push the convert button it comes back and says that it could not convert. It says that it was an invalid request. I suspect that something needs to be updated since the hard drives are probably outdated, but I don't know what to do. Please help.
  2. sickmacdoc macrumors 68020


    Jun 14, 2008
    New Hampshire
    I was having a similar problem last night and did some research and found one thing that will probably not sound too good to you, but have to share it anyways. :( It indicated that an existing RAID set would not be recognized as a valid RAID set if it were hooked up to any other model of RAID controller (i.e. Oxford 912, 922 etc.) than it was when it was originally created.

    If your drives are in cases (or internally mounted) with a different controller than the original RAID was created with, it seems that that might well be your problem. In my situation I had a similar dual-drive case with RAID 1 (mirrored) set up and one drive died, so in order to determine which one the dead one was I had remounted them in two single drive cases, but while they showed up as RAID slices in Disk Utility, neither could be accessed (and in short time they caused a Kernal Panic) and a new RAID set could not be created with them.

    SO- back into the original case and bingo- showed the RAID with a degraded slice. Pulled one drive (naturally the wrong one), then the other and replaced the dead drive and it went about its business rebuilding the new drive with the contents of the other (which of course would not be possible with a RAID 0).
  3. pamcam thread starter macrumors newbie

    Sep 5, 2008
    Thanks for your reply; however, the drives are still in the original case and I don't think the controller has been changed.Last time I hooked the case up to my computer it worked fine. However, that was a long time ago and since then I have upgraded the operating system, etc. In fact, I might have still been on OS 9 back then. Could the problem be my operating system or maybe a driver incompatibly issue?

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