vinum drive referenced / disklabel inconsistency

From: Clark C. Evans (cce_at_clarkevans.com)
Date: 06/29/03

  • Next message: Samuel Tardieu: "IPFilter & IPv6" 
    Date: Sun, 29 Jun 2003 20:12:06 +0000
To: freebsd-stable@freebsd.org

    I am trying to setup vinum on a box using 4.8 RELENG_4 (as of about a
    week ago snapshot). This box was running 4.6 /w vinum on same hard
    drives for the last 4 months wonderfully... but since it is my
    current 'scratch/backup' box, I just reinstalled with -STABLE.

    # uname -a
      FreeBSD polya.axista.com 4.8-STABLE FreeBSD 4.8-STABLE #22: Tue Jun 24
      17:01:07 EDT 2003 cce@cantor.local:/usr/obj/usr/src/sys/GENERIC i386

    Anyway, my problems seem to be coming from a disklabel issue. Following
    the instructions in the handbook (for disk addition), I go through the
    following steps:

       # dd if=/dev/zero of=/dev/ad2 bs=1k count=1
       # fdisk -BI ad2
       # disklabel -B -w -r ad2s1 auto

    And at this point, I use the following to extract the current
    label, and then I edit it with vi, and then update it:
      
       # disklabel ad2s1 > label
       # vim label
       # disklabel -R -r ad2s1 label

    Following is the tail end of the label (I don't edit anything else)
    where I add 'swap' and 'vinum' partitions:

      a: 4193280 0 swap
      c: 156301425 0 unused 0 0
      e: 152107200 4193280 vinum

    The results, when "restoring" the label, however, are inconsistent, with

      # disklabel ad2s1
      # disklabel ad2
      # disklabel -r ad2s1
      # disklabel -r ad2
      # disklabel /dev/ad2s1
      # disklabel -r /dev/ad2s1

    the results are expected (and identical):

      <snip/>

      8 partitions:
      # size offset fstype [fsize bsize bps/cpg]
        a: 4193280 0 swap # (Cyl. 0 - 4159)
        c: 156301425 0 unused 0 0 # (Cyl. 0 - 155060*)
        e: 152107200 4193280 vinum # (Cyl. 4160 - 155059)

    However, for the other two permutations... the results are different:

      # disklabel /dev/ad2

      <snip/>

      8 partitions:
      # size offset fstype [fsize bsize bps/cpg]
     c: 156301488 0 unused 0 0 # (Cyl. 0 - 155060)
      
      # disklabel -r /dev/ad2
      disklabel: bad pack magic number (label is damaged, or pack is unlabeled)

    At this point, I use the following vinum configuration file to
    setup vinum "vinum create -f vinum.conf"

        drive d2 device /dev/ad2s1e
        volume tmp setupstate
         plex name tmp.2 org concat
          sd length 2000m drive d2

    And this produces...

      1 drives:
      D d2 State: referenced Device Avail: 0/0 MB
      
      1 volumes:
      V tmp State: down Plexes: 1 Size: 2000 MB
      
      1 plexes:
      P tmp.2 C State: faulty Subdisks: 1 Size: 2000 MB
      
      1 subdisks:
      S tmp.2.s0 State: crashed PO: 0 B Size: 2000 MB

    And of course, this is where I get stuck... With 4.6 I didn't have any
    of these problems (from the bad pack magic number to the missing device
    in the vinum state). Anyway, following is the full output from the
    disklabel.

    # disklabel -r /dev/ad2s1
      # /dev/ad2s1:
      type: unknown
      disk: amnesiac
      label:
      flags:
      bytes/sector: 512
      sectors/track: 63
      tracks/cylinder: 16
      sectors/cylinder: 1008
      cylinders: 155060
      sectors/unit: 156301425
      rpm: 3600
      interleave: 1
      trackskew: 0
      cylinderskew: 0
      headswitch: 0 # milliseconds
      track-to-track seek: 0 # milliseconds
      drivedata: 0
      
      8 partitions:
      # size offset fstype [fsize bsize bps/cpg]
        a: 4193280 0 swap # (Cyl. 0 - 4159)
        c: 156301425 0 unused 0 0 # (Cyl. 0 - 155060*)
        e: 152107200 4193280 vinum # (Cyl. 4160 - 155059)

    Thank you for any suggestions you may have,

    Clark
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