locked
Using WHS to change RAID configuration RRS feed

  • Question

  • I have been running WHS for about a year and one of the desktops it backs up has 2 drives in a RAID 1 configuration.   Now that I am very comfortable with WHS I want to convert the RAID1 to RAID 0 to get more space and improved performance.  Can I restore to a RAID 0 config when the backups have been created from a RAID1 config.  The new configuration will be larger, so no problem there, but I am afraid the storage driver that will be loaded on the USB key won't support the change in RAID configuration.  If that is true is there any way to get the correct driver loaded so the restore will work?

    Ken
    Sunday, January 11, 2009 5:40 AM

Answers

  • KWOB said:

    Ken & Chris,

    Thanks for your replies.  I don't see an option in my Nvidia Raid controller to convert from RAID 1 to RAID 0.  I was thinking if I tried this and it failed that I would be in trouble but Chris reminded me that I could always go back to the RAID 1 config and do the restore which gives me a good fallback plan.  I probably won't be tackling this immediately but when I do I will provide feedback.

    Thanks again,
    Ken


    nVidia's RAID controller does support migrating from RAID 1 to RAID 0.  In some cases nVidia calls it 'morphing'.  I've personally never done any migrations with nVidia's RAID controller, so I can't say how well it works.
    • Marked as answer by KWOB Monday, January 12, 2009 4:28 AM
    Monday, January 12, 2009 12:28 AM

All replies


  • You may want to look at the documentation for your RAID controller to see if it supports the migration you want to do without having to use WHS.  For instance with the Intel ICH#R chipsets the onboard controller supports a # of different types of migrations.  With the Intel chipset you'd break the RAID1 array, then migrate the RAID ready system to RAID 0.  I have no idea what controller you have, but it would be safer to use the controllers built in features (providing they work of course) than to attempt restore to a modified RAID volume.

    If you do attempt to restore to a different RAID configuration, I suggest removing any RAID software prior to making the backup to be restored.  In practice, I don't think I've ever had a 100% trouble free restore (usually the drivers for restore seem to have incorrect network drivers).  Then again, I haven't performed a restore in the last year.

    Good luck
    Chris

    Sunday, January 11, 2009 5:59 AM
  • The RAID drivers will probably be the same, so there is a decent chance that you will be able to simply break your array and recreate it as RAID 0, then restore. You will probably have to reconfigure backups afterward; the RAID 0 "drive" is unlikely to be recognized as being the original drive.

    There is a fairly large number of potential problem scenarios, though (too many to list, really; use your imagination and you'll probably come up with several very quickly). For the most part you will wind up being on your own in the solution of them as nobody here will have your exact configuration, and many of the issues will be very configuration specific. I do wish you luck if you decide to proceed, and post back here if you hit problems; often even a partial answer will guide you in the correct direction.
    I'm not on the WHS team, I just post a lot. :)
    Sunday, January 11, 2009 4:40 PM
    Moderator

  • Ken is correct in saying there are numerous items that can go wrong.  Usually an issue of user error and poor documentation, in some cases bugs in hardware/software.  The good news is that you do have the client backuped on WHS so you can always restore to the original hardware configuration.
    Sunday, January 11, 2009 7:34 PM
  • Ken & Chris,

    Thanks for your replies.  I don't see an option in my Nvidia Raid controller to convert from RAID 1 to RAID 0.  I was thinking if I tried this and it failed that I would be in trouble but Chris reminded me that I could always go back to the RAID 1 config and do the restore which gives me a good fallback plan.  I probably won't be tackling this immediately but when I do I will provide feedback.

    Thanks again,
    Ken
    Sunday, January 11, 2009 11:41 PM
  • KWOB said:

    Ken & Chris,

    Thanks for your replies.  I don't see an option in my Nvidia Raid controller to convert from RAID 1 to RAID 0.  I was thinking if I tried this and it failed that I would be in trouble but Chris reminded me that I could always go back to the RAID 1 config and do the restore which gives me a good fallback plan.  I probably won't be tackling this immediately but when I do I will provide feedback.

    Thanks again,
    Ken


    nVidia's RAID controller does support migrating from RAID 1 to RAID 0.  In some cases nVidia calls it 'morphing'.  I've personally never done any migrations with nVidia's RAID controller, so I can't say how well it works.
    • Marked as answer by KWOB Monday, January 12, 2009 4:28 AM
    Monday, January 12, 2009 12:28 AM