Error "No extents were found for the plex." when trying to add softwaremirror in Server 2008

Discussion in 'Windows Server' started by Michael Herchel, Jul 9, 2009.

  1. When I attempt to add a mirror through the Disk Management Utility in
    Server 08, I get the following error:

    "No extents were found for the plex."

    I have tried making sure the disk was basic, I have tried the clean
    command within the DISKPART utility.



    More Background Info:
    --------------------
    The system is an HP Proliant DL320 G4 Server. It has two 80GB SATA HDDs.

    It was previously running as a DC running 2003 Server. At that point it
    did have a software mirror (which worked wonderfully).

    To upgrade it, I broke the mirror, demoted the DC, removed it from the
    domain and then did a fresh install of Server 2008. During that install,
    I selected the option to format the drive. Then I installed Server 2008,
    configured it, etc. My only problem is when I attempt to recreate that
    mirror.



    More Troubleshooting Info:
    -------------------------
    When I go into Diskpart and "list disk", I get the following output:




    ================================================================================================
    DISKPART> list disk

    Disk ### Status Size Free Dyn Gpt
    -------- ---------- ------- ------- --- ---
    Disk 0 Online 75 GB 6144 KB *
    Disk 1 Online 75 GB 75 GB *
    Disk M0 Missing 0 B 0 B *
    Disk M1 Missing 0 B 0 B *

    DISKPART>
    ================================================================================================




    From here, you can see both disk 0 and 1. But, it also shows mirrors
    that are missing.

    However, when I attempt to use DISKPART's 'break' command, I get the
    message stating, "The volume selected is not a mirror. Please select a
    mirror and try again."





    ================================================================================================
    DISKPART> list disk

    Disk ### Status Size Free Dyn Gpt
    -------- ---------- ------- ------- --- ---
    Disk 0 Online 75 GB 6144 KB *
    Disk 1 Online 75 GB 75 GB *
    Disk M0 Missing 0 B 0 B *
    Disk M1 Missing 0 B 0 B *

    DISKPART> break

    There is no volume selected to break.
    Please select a dynamic mirror to break.

    DISKPART> select disk m0

    Disk M0 is now the selected disk.

    DISKPART> break

    There is no volume selected to break.
    Please select a dynamic mirror to break.

    DISKPART> list volume

    Volume ### Ltr Label Fs Type Size Status Info
    ---------- --- ----------- ----- ---------- ------- ---------
    --------
    Volume 0 C NTFS Simple 75 GB Healthy
    System
    Volume 1 D CD-ROM 0 B No Media

    DISKPART> select volume 0

    Volume 0 is the selected volume.

    DISKPART> break

    The volume selected is not a mirror.
    Please select a mirror and try again.

    DISKPART> select disk 1

    Disk 1 is now the selected disk.

    DISKPART> select volume 0

    Volume 0 is the selected volume.

    DISKPART> break

    The volume selected is not a mirror.
    Please select a mirror and try again.

    DISKPART>
    ================================================================================================



    So, as far as I can tell, there must be something within the partition
    that's telling the disk subsystem that there should be a mirror, and
    that's why it won't let me add another one.

    Unfortunately, I don't see any way to fix this.

    Does anyone have any suggestions or things that I can try?

    Thanks,
    -Mike
     
    Michael Herchel, Jul 9, 2009
    #1
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  2. [snipped]

    I haven't seen this error yet. However, searching around, I found the following link. According to the following link, it recommends a SmartStart update:
    http://forums11.itrc.hp.com/service...47626+1247149275143+28353475&threadId=1343944

    Also, IIRC, for Windows software mirroring, all disks need to be Dynamic.

    More links on it:
    KBAlertz:
    Software mirrored boot volumes in Windows Server 2008 cannot be broken from Disk Management
    http://kbalertz.com/969749/Software-mirrored-volumes-Windows-Server-cannot-broken-Management.aspx

    http://social.technet.microsoft.com...s/thread/6f486437-bc12-41f5-8967-ca90e584e586


    --
    Ace

    This posting is provided "AS-IS" with no warranties or guarantees and confers no rights.

    Please reply back to the newsgroup/forum to benefit from collaboration among responding engineers, as well as to help others benefit from your resolution.

    Ace Fekay, MCT, MCSE 2003 & 2000, MCSA 2003 & 2000, MCSA Messaging
    Microsoft Certified Trainer

    http://twitter.com/acefekay

    For urgent issues, you may want to contact Microsoft PSS directly. Please check http://support.microsoft.com for regional support phone numbers.
     
    Ace Fekay [Microsoft Certified Trainer], Jul 9, 2009
    #2
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  3. Thanks for the link Ace. The SmartStart is the disk that HP gives you to
    install before you install the OS.

    I do have the latest firmware installed. Still having the same issue,
    though.

    Any other suggestions?

     
    Michael Herchel, Jul 9, 2009
    #3
  4. Other than bot disks need to be Dynamic, I'm fresh out. Sorry. Maybe someone else can provide a better suggestion.

    Ace
     
    Ace Fekay [Microsoft Certified Trainer], Jul 9, 2009
    #4
  5. Yep. I tried setting it to both basic, and dynamic.

    When it's basic before I try, it will automatically be converted to
    dynamic before it tries to add the mirror. But at that point, I get that
    error.

    Thanks for your help.

    If anyone else is out there and has any suggestions please let me know!
     
    Michael Herchel, Jul 9, 2009
    #5
  6. You are welcome. Hopefully someone else has come across this and can better assist.

    Ace
     
    Ace Fekay [Microsoft Certified Trainer], Jul 9, 2009
    #6
  7. Did you try in diskpart
    delete disk m0
    delete disk m1
    ?
     
    Dusko Savatovic, Jul 10, 2009
    #7
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