04/26/96, 4FAX# 4690
 
  Mapping SSA hdisks and pdisks
 
 
 
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       Information in this document is correct to the best of our
       knowledge at the time of this writing.  Please send feedback
       by fax to "AIXServ Information" at (512) 823-4009.
 
       Please use this information with care.  IBM will not be
       responsible for damages of any kind resulting from its use.
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       the customer and depends on the customer's ability to eval-
       uate and integrate this information into the customer's
       operational environment.
 
  ABOUT THIS DOCUMENT
 
       This document explains how to map SSA hdisks to pdisks and
       applies to AIX 3.2.5.1 and AIX 4.1.
 
  USING THE SSA SERVICE AIDS
 
       You can use the diagnostic service aids if you are logged in
       as root.  Use the following procedure:
 
       1.  Run "diag"
 
       2.  Choose "Service Aids"
 
       3.  Choose "SSA Service Aids"
 
       4.  Choose "Configuration Verification"
 
       5.  Choose the pdisk or hdisk you want the corresponding
           hdisk or pdisk for.  This will show the mapping.
 
  USING THE INFORMATION IN THE ODM
 
       Part of the information stored in the ODM database for the
       hdisks and pdisks is the unique serial number for every SSA
       disk.  You can display the serial number for a pdisk or
       hdisk with the following command:
 
              lsattr -El <hdisk# or pdisk#> -a connwhere_shad
 
       Then by finding the pdisk and hdisk with the same serial
       number, you can determine the mapping.  Alternatively, you
       can use the following shell script
 
 
 
 
 
 
 
 
 
 
 
                                        Mapping SSA hdisks and pdisks  1
 
 
                                                    04/26/96, 4FAX# 4690
 
          #!/bin/ksh
          #
          # 1. Create this script using your favorite editor.  Name it
          #     "lsssa".
          # 2. Change it's permission to allow execution with
          #    "chmod +x lsssa".
          #
          # This script lists all SSA hdisks, it's associated pdisk,
          # serial number, physical volume ID (PVID) and volume group
          # membership.
          #
          # First get a list of the SSA hdisks
          hdisks=`lsdev -Cc disk | grep SSA | cut -f1 -d" "`
             hdisks=`lsdev -Cc disk -s ssar -F name`
          pdisks=`lsdev -Cc pdisk | cut -f1 -d" "`
             pdisks=`lsdev -Cc pdisk -F name`
          touch /tmp/hdisk.$$           # Temporary file - hdisk & SN
          touch /tmp/pdisk.$$           # Temporary file - pdisk & SN
 
          for i in $hdisks
          do
          print -n "$i "  >> /tmp/hdisk.$$
          lsattr -El $i -a connwhere_shad | cut -c20-27 >> /tmp/hdisk.$$
          done
 
          for i in $pdisks
          do
          print -n "$i "  >> /tmp/pdisk.$$
          lsattr -El $i -a connwhere_shad | cut -c20-27 >> /tmp/pdisk.$$
          done
 
          # Print header
          print "hdisk\tpdisk\tSerial Number\tPVID\t\t\tVG"
 
          # Get PVID and VG for each hdisk and print it out
          for i in $hdisks
          do
          sn=`grep $i /tmp/hdisk.$$ | cut -f2 -d" "`
              sn=`grep "$i " /tmp/hdisk.$$ | awk '{ print $2 }'`
          pdisk=`grep $sn /tmp/pdisk.$$ | cut -f1 -d" "`
              pdisk=`grep $sn /tmp/pdisk.$$ | awk '{ print $1 }'`
          pvid=`lspv | grep $i | sed -e 's/ \{2,\}/ /g' | cut -f2 -d" "`
              pvid=`lspv | grep "$i " | awk '{ print $2 }'`
          vg=`lspv | grep $i | sed -e 's/ \{2,\}/ /g' | cut -f3 -d" "`
              vg=`lspv | grep "$i " | awk '{ print $3 }'`
          print "$i\t$pdisk\t$sn\t$pvid\t$vg"
          done
 
          rm /tmp/pdisk.$$ /tmp/hdisk.$$
 
 
 
 
 
 
 
 
 
 
 
 
                                        Mapping SSA hdisks and pdisks  2
 
 
                                                    04/26/96, 4FAX# 4690
 
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  END OF DOCUMENT (ssa.mapping.krn, 4FAX# )
 
 
 
                                        Mapping SSA hdisks and pdisks  3