/dev/rdsk/c5t0d0s5 (/opt) gone after manual VxVM removal

From: NetComrade (netcomrade_at_bookexchange.net)
Date: 05/03/05

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    Date: Tue, 3 May 2005 15:42:08 -0400 (EDT)
To: sunmanagers@sunmanagers.org

    All,

    We had a test server running vxvm3.1, where we tried removing VxVM3.1,
    together with dbed2.1. Can opt be recovered, and why was it lost?
    Here are the steps taken:
    a) /etc/system edited to take out all vxvm3.1
    b) system rebooted, but VxVM license was missing
    c) system rebooted off second disk (which had pre-vm disk config) (system
    refused to boot from cdrom with MMU error)
    d) /etc/vfstab overwritten with /etc/vfstat.prevm on original boot disk
    e) system rebooted again with -s
    f) all veritas pkgs removed
    g) system rebooted

    /dev/rdsk/c5t0d0s5: I/O error
    Can't open /dev/rdsk/c5t0d0s5
    /dev/rdsk/c5t0d0s5: CAN'T CHECK FILE SYSTEM.
    /dev/rdsk/c5t0d0s5: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY.

    fsck fails

    [root@v880]-> format
    Searching for disks...done

    AVAILABLE DISK SELECTIONS:
    Unable to open /dev/tty.

    [root@v880]-> prtvtoc /dev/rdsk/c5t0d0s5
    * /dev/rdsk/c5t0d0s5 partition map
    *
    * Dimensions:
    * 512 bytes/sector
    * 424 sectors/track
    * 24 tracks/cylinder
    * 10176 sectors/cylinder
    * 14089 cylinders
    * 14087 accessible cylinders
    *
    * Flags:
    * 1: unmountable
    * 10: read-only
    *
    * Unallocated space:
    * First Sector Last
    * Sector Count Sector
    * 4019520 4290947776 4294967295
    * 143349312 4155637504 4019519
    * 12414720 79382976 91797695
    * 99999552 43339584 143339135
    *
    * First Sector Last
    * Partition Tag Flags Sector Count Sector Mount Directory
           0 2 00 0 4019520 4019519 /
           1 7 00 4019520 8395200 12414719 /var
           2 5 00 0 143349312 143349311
           4 15 01 143339136 10176 143349311
           6 4 00 91797696 8201856 99999551 /usr
           7 14 01 0 143349312 143349311

    this is the only thing I had saved:
    [root@v880]-> cat rootdg.vxprint
    dg rootdg default default 0 1112383996.1025.v880

    dm rootdisk c5t0d0s2 sliced 10175 143339136 -

    v opt - ENABLED ACTIVE 12292608 fsgen -
    ROUND
    pl opt-01 opt ENABLED ACTIVE 12292608 CONCAT -
    RW
    sd rootdisk-04 opt-01 rootdisk 79505087 12292608 0 c5t0d0
    ENA

    v rootdisk3vol - ENABLED ACTIVE 67090368 swap -
    ROUND
    pl rootdisk3vol-01 rootdisk3vol ENABLED ACTIVE 67090368 CONCAT -
    RW
    sd rootdisk-01 rootdisk3vol-01 rootdisk 12414719 67090368 0 c5t0d0
    ENA

    v rootvol - ENABLED ACTIVE 4019520 root -
    ROUND
    pl rootvol-01 rootvol ENABLED ACTIVE 4019520 CONCAT -
    RW
    sd rootdisk-B0 rootvol-01 rootdisk 143339135 1 0 c5t0d0
    ENA
    sd rootdisk-02 rootvol-01 rootdisk 0 4019519 1 c5t0d0
    ENA

    v usr - ENABLED ACTIVE 8201856 fsgen -
    ROUND
    pl usr-01 usr ENABLED ACTIVE 8201856 CONCAT -
    RW
    sd rootdisk-03 usr-01 rootdisk 91797695 8201856 0 c5t0d0
    ENA

    v var - ENABLED ACTIVE 8395200 fsgen -
    ROUND
    pl var-01 var ENABLED ACTIVE 8395200 CONCAT -
    RW
    sd rootdisk-05 var-01 rootdisk 4019519 8395200 0 c5t0d0
    ENA
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