Procedure for replacing a bad disk which is part of a mirror

Discussion in 'Server Setup' started by Mark, Aug 4, 2006.

  1. Mark

    Mark Guest

    I have a Win2003 server with 2 disks which are mirrored. Disk 0 crashed on
    me. The server boots just fine from the mirror on Disk 1, however I suspect
    that Disk 1 may be on it's way out also. I just want to get some feedback on
    the proper procedure for replacing BOTH drives. Tell me if my thinking is
    correct, or not.
    First, replace Disk 0 and rebuild the mirror. Then break the mirror,
    replace Disk 1, and rebuild the mirror. Does this sound correct?

    Thanks.
     
    Mark, Aug 4, 2006
    #1
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  2. Mark

    Admiral Q Guest

    "Mark" <> wrote in message
    news:%23c7$...
    > I have a Win2003 server with 2 disks which are mirrored. Disk 0 crashed on
    > me. The server boots just fine from the mirror on Disk 1, however I
    > suspect that Disk 1 may be on it's way out also. I just want to get some
    > feedback on the proper procedure for replacing BOTH drives. Tell me if my
    > thinking is correct, or not.
    > First, replace Disk 0 and rebuild the mirror. Then break the mirror,
    > replace Disk 1, and rebuild the mirror. Does this sound correct?
    >
    > Thanks.
    >
    >


    You could try that or backup the good drive, replace both drives and mirror,
    then restore the backup. Either way should work, but me, I'd try your idea
    first, it keeps one from having to backup/restore, but I would backup to
    start with, you know, just in case.

    --
    Star Fleet Admiral Q @ your service!

    Google is your Friend!
    http://www.google.com
     
    Admiral Q, Aug 4, 2006
    #2
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  3. Mark

    anthonyv Guest

    Mark.

    that sounds like the best plan.

    Can you tell me how you got the mirror drive to boot? Are you running
    software mirroring?I have the same situation in 2003 SBS where my Drive 0 is
    predicting imminent failure and suggests replacing. The problem is I can't
    get it to boot off the mirror to run the rebuild to Drive 0. Seems like my
    mirror drive is not set as active to boot the OS. I don't want to have to
    rebuild from scratch. Any help is greatly appreciated

    "Mark" wrote:

    > I have a Win2003 server with 2 disks which are mirrored. Disk 0 crashed on
    > me. The server boots just fine from the mirror on Disk 1, however I suspect
    > that Disk 1 may be on it's way out also. I just want to get some feedback on
    > the proper procedure for replacing BOTH drives. Tell me if my thinking is
    > correct, or not.
    > First, replace Disk 0 and rebuild the mirror. Then break the mirror,
    > replace Disk 1, and rebuild the mirror. Does this sound correct?
    >
    > Thanks.
    >
    >
    >
     
    anthonyv, Aug 4, 2006
    #3
  4. Mark

    Mark Guest

    I an using software mirroring. When I start the computer I get a boot menu
    which gives me the option of booting from Windows Server 2003, or the
    mirrored drive. It will NOT boot if I choose Windows Server 2003, but it
    boots just fine if I choose the mirror.

    "anthonyv" <> wrote in message
    news:...
    > Mark.
    >
    > that sounds like the best plan.
    >
    > Can you tell me how you got the mirror drive to boot? Are you running
    > software mirroring?I have the same situation in 2003 SBS where my Drive 0
    > is
    > predicting imminent failure and suggests replacing. The problem is I
    > can't
    > get it to boot off the mirror to run the rebuild to Drive 0. Seems like
    > my
    > mirror drive is not set as active to boot the OS. I don't want to have to
    > rebuild from scratch. Any help is greatly appreciated
    >
    > "Mark" wrote:
    >
    >> I have a Win2003 server with 2 disks which are mirrored. Disk 0 crashed
    >> on
    >> me. The server boots just fine from the mirror on Disk 1, however I
    >> suspect
    >> that Disk 1 may be on it's way out also. I just want to get some feedback
    >> on
    >> the proper procedure for replacing BOTH drives. Tell me if my thinking is
    >> correct, or not.
    >> First, replace Disk 0 and rebuild the mirror. Then break the mirror,
    >> replace Disk 1, and rebuild the mirror. Does this sound correct?
    >>
    >> Thanks.
    >>
    >>
    >>
     
    Mark, Aug 4, 2006
    #4
  5. Mark

    anthonyv Guest

    i get the same message to boot from the mirror but only if Drive 0 is still
    connected. For example, if I disconnect drive 0 the system hangs and will
    not give boot options. The only way it give boot options is if Drive 0 is
    connected the way it always has been. Incidentally, the server will boot off
    a floppy with ntldr, ntdetect and boot.ini files.

    that said, I think i found a work around using Disk Mgmt. I broke the
    mirror to drive 1 and removed all partitions from Drive 1. I then created a
    small FAT partition at the beginning of Drive 0 and copied ntldr,ntdetect and
    boot.ini to that partition. I then mirrored back the C: system partition and
    D: Data partition so they are in sync. I can now boot from either disk on
    its own without the other connected. I connect the new Drive 0, and boot
    using DRIVE 1. Disk administrator shows the original drive 0 as a missing
    mirror pair. I broke the mirror to the original drive 0 and remove the drive
    from disk mgmt. I create the same size FAT partition on the new Drive 0,
    copy the same boot files (ntldr, ntdetect, boot.ini) to the partition and set
    Drive 1 to mirror back C: System and D: partition. This will ensure both
    drives are in sync and are able to boot independant of the other.

    The only caviat is that you must manage updates and changes to the boot.ini
    file manually going forward.

    Hope these steps help others because no one was replying to my other post.

    "Mark" wrote:

    > I an using software mirroring. When I start the computer I get a boot menu
    > which gives me the option of booting from Windows Server 2003, or the
    > mirrored drive. It will NOT boot if I choose Windows Server 2003, but it
    > boots just fine if I choose the mirror.
    >
    > "anthonyv" <> wrote in message
    > news:...
    > > Mark.
    > >
    > > that sounds like the best plan.
    > >
    > > Can you tell me how you got the mirror drive to boot? Are you running
    > > software mirroring?I have the same situation in 2003 SBS where my Drive 0
    > > is
    > > predicting imminent failure and suggests replacing. The problem is I
    > > can't
    > > get it to boot off the mirror to run the rebuild to Drive 0. Seems like
    > > my
    > > mirror drive is not set as active to boot the OS. I don't want to have to
    > > rebuild from scratch. Any help is greatly appreciated
    > >
    > > "Mark" wrote:
    > >
    > >> I have a Win2003 server with 2 disks which are mirrored. Disk 0 crashed
    > >> on
    > >> me. The server boots just fine from the mirror on Disk 1, however I
    > >> suspect
    > >> that Disk 1 may be on it's way out also. I just want to get some feedback
    > >> on
    > >> the proper procedure for replacing BOTH drives. Tell me if my thinking is
    > >> correct, or not.
    > >> First, replace Disk 0 and rebuild the mirror. Then break the mirror,
    > >> replace Disk 1, and rebuild the mirror. Does this sound correct?
    > >>
    > >> Thanks.
    > >>
    > >>
    > >>

    >
    >
    >
     
    anthonyv, Aug 4, 2006
    #5
  6. You cannot boot the server with the second of the two mirror disks,
    unless you use a Windows boot floppy disk. See also
    http://support.microsoft.com/default.aspx?scid=kb;en-us;113977
    http://support.microsoft.com/kb/167045/EN-US/
    After booting into Windows you can rebuild your mirror
    from the intact mirror disk.


    "Mark" <> wrote in message
    news:%23c7$...
    > I have a Win2003 server with 2 disks which are mirrored. Disk 0 crashed on
    > me. The server boots just fine from the mirror on Disk 1, however I

    suspect
    > that Disk 1 may be on it's way out also. I just want to get some feedback

    on
    > the proper procedure for replacing BOTH drives. Tell me if my thinking is
    > correct, or not.
    > First, replace Disk 0 and rebuild the mirror. Then break the mirror,
    > replace Disk 1, and rebuild the mirror. Does this sound correct?
    >
    > Thanks.
    >
    >
     
    Pegasus \(MVP\), Aug 10, 2006
    #6
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