Vol Manager Submirror doesn't boot

From: Athanasios Douitsis (aduitsis_at_noc.ntua.gr)
Date: 06/06/03

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    Date: Fri, 6 Jun 2003 19:27:42 +0300
To: sunmanagers@sunmanagers.org

    Hello everyone,

    I have an Ultra5 with 2 identical IDE disks which
    act as submirrors in a RAID-1 configuration. As I
    was running some emergency drills, I noticed that
    if I physicaly remove the second submirror the first
    submirror boots ok (into single user mode though, but
    that's expected) . But if I remove the first submirror,
    the second submirror refuses to boot and gives a kernel
    panic! I tried to google around and I found a couple of
    questions in sunmanagers, but I could not find any summary.
    So if anyone knows what gives, I will be happy to summarize.

    (You can see that it can find the / partition and the kernel,
    but something goes wrong afterwards. )
    I tried to boot -a and change /pseudo/md@0:0,0,blk into something
    like /pci@1f,0/pci@1,1/ide@3/disk@2,0 but to no avail.
    I suppose I could boot a cd into sigle user mode and mess around
    with the vfstab, but that would be besides the point as the
    right solution is to have a mirror disk that is ready to boot
    *anytime*

    thanks in advance,
    Thanassis

    ok boot disk2
    Boot device: /pci@1f,0/pci@1,1/ide@3/disk@2,0 File and args:
    SunOS Release 5.9 Version Generic_112233-06 64-bit
    Copyright 1983-2002 Sun Microsystems, Inc. All rights reserved.
    Use is subject to license terms.
    WARNING: ata_controller - Set features failed
    WARNING: pcipsy0-xintr: ino 20 is invalid
    WARNING: pcipsy0-xintr: ino 20 is invalid
    Cannot mount root on /pseudo/md@0:0,0,blk fstype ufs

    panic[cpu0]/thread=140a000: vfs_mountroot: cannot mount root

    0000000001409970 genunix:vfs_mountroot+70 (0, 0, 0, 200, 1456c10, 0)
      %l0-3: 000000000144a800 000000000144a800 0000000000002000 000000000148b808
      %l4-7: 0000000001489000 0000000001411bd8 000000000144b000 000000000144e000
    0000000001409a20 genunix:main+98 (1409ba0, f00671f4, 1409ec0, 3449e9, 2000, 500)
      %l0-3: 0000000000000001 0000000000000000 0000000001412c70 0000000078002000
      %l4-7: 000000000140a000 0000000000346000 0000000001490ec8 0000000001062ae0

    skipping system dump - no dump device configured
    rebooting...
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