Mismatch between physical geometry and disk label contents

From: Johan Hartzenberg (jhartzen@csc.com)
Date: 04/17/03

  • Next message: Harbi, Fatima: "RE: tar: blocksize = 0" 
    To: sunmanagers@sunmanagers.org
From: "Johan Hartzenberg" <jhartzen@csc.com>
Date: Thu, 17 Apr 2003 15:23:04 +0200

    Hi gurus,

    I was happily scripting a couple of weeks ago and came across something
    that produced a message similar to this (off the top of my head)

    Warning: The label contents does not match the geometry reported by the
    physical device.

    Now I can not remember the command I ran, but I want to use it in another
    script. I was busy writing a script to report on raw disk sizes as seen by
    Solaris (not Veritas), and I was playing with commands like

    format, prtvtoc, fmthard

    I've been searching the web and sunsolve, but I can't find out what it is I
    did. Makes me want to "script" to record everything I do... !

    The situation I have is that sometimes when the storage administrators
    allocate a whole bunch of LUNs I do not check each individually, and
    sometimes I don't realise I am not seeing the full LUN (eg if the first
    sector of an expanded LUN was previously the first sector of a smaller
    LUN). I am trying to write a script which will tell me where I may be
    using LUNs without getting access to the whole full size of the LUN.

    moreover, I have tried to write something to compare the output of fdisk -g
    with that of fdisk -G, but I always get the following message:

    # fdisk -g /dev/rdsk/c3t11d4s2
    * Label geometry for device /dev/rdsk/c3t11d4s2
    * PCYL NCYL ACYL BCYL NHEAD NSECT SECSIZ
      39516 39516 2 0 15 96 512
    # fdisk -G /dev/rdsk/c3t11d4s2
    /dev/rdsk/c3t11d4s2: Cannot get physical disk geometry.

    devinfo appears totally useless, and on Solaris 2.6 I get for -g and -G
    both:

          Disk does not support fixed disk partition table

    Any ideas/suggestions ?

    Thanx,
     _Johan
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