IC35897: TSM SERVER'S NOT CLEANING THE DRIVE IF THE MOUNT FAILS DUE TO DRIVE CLEANING REQUEST (DEVCLASS=DLT, ASC/ASCQ=80/01)

APAR status

• Closed as suggestion for future release.

Error description

• TSM SUN Server 5.1.6.x
  TSM Device Driver used; devtype=DLT; DLT7000 drives.
  .
  The mount of a DLT cartridge is failing because reading the
  label fails with I/O error and ASC/ASCQ=80/01 indicating
  drive cleaning is required.
  The TSM server issues the ANR8914I indicating that drive
  cleaning is required.
  Problem is that the cleaning operation will only be done at
  time the volume is dismounted (see "system action" for ANR8914I)
  but the dismount is never done as the mount itself is failing.
  As a result the drive is never cleaned automatically.
  Because the TSM server mount routine does not check if the
  drive's needsCleaning flag is set to TRUE it mounts a cartridge
  into the drive again resulting into I/O errors again.
  .
  Extract actlog:
  02/11/03   04:59:35      ANR8944E Hardware or media error on
   drive D5 (/dev/rmt/10mt)
   (OP=READ, Error Number=110, CC=422,
   KEY=03, ASC=80, ASCQ=01,
   SENSE=F0.00.03.00.00.00.50.16.0-
   0.00.00.00.80.01.00.00.00.00.87.06.00.00.00.00.00.00.00.-
   00.00., Description=An undetermined error has
   occurred).
   Refer to Appendix D in the 'Messages' manual for
   recommended action.
  02/11/03   04:59:35      ANR8914I Drive D5 (/dev/rmt/10mt) in
   library LIB needs to be cleaned.
  02/11/03   04:59:35      ANR8355E I/O error reading label for
   volume 000775 in drive D5 (/dev/rmt/10mt).
  ...
  02/11/03   05:00:07      ANR8381E DLT volume 000775 could not
   be mounted in drive D5 (/dev/rmt/10mt).
  ...
  02/11/03   10:59:06      ANR8337I DLT volume DOY281 mounted
   in drive D5 (/dev/rmt/10mt).
  ...
  02/11/03   11:52:00      ANR2017I Administrator ADMIN issued
   command: QUERY MOUNT
  02/11/03   11:52:00      ANR8330I DLT volume DOY281 is mounted
   R/O in drive D5 (/dev/rmt/10mt), status: IN USE.
  ...
  02/11/03   12:06:23      ANR8468I DLT volume DOY281 dismounted
   from drive D5 (/dev/rmt/10mt) in library LIB.
  02/11/03   12:06:23      ANR8906I Cleaning drive D5
   (/dev/rmt/10mt) in library LIB.
  .
  .
  In this example no I/O errors occured as the cartridge was
  mounted R/O.
  .
  The TSM server should not be allowed to mount volumes into a
  drive where the needsCleaning flag is still set to TRUE.
  .
  This can be tested very easily by changing the drive
  needsCleaning flag to TRUE using undocumented SHOW cmd.
  The next mount request to the drive will be satisfied although
  cleaning is still outstanding.
  

Local fix

• use CLEAN DRIVE command
  

Problem summary

Problem conclusion

Temporary fix

Comments

• The suggested fix for this problem is not possible.  DLT is the
  only type of drive that cleaning fails commands. Because
  cleaning does not normally fail commands the drives are not
  cleaned until the drive is dismounted.  So in order for the
  drive to be cleaned it needs to be mounted first. The only way
  to handle the way DLT reports drive cleaning would be to clean
  the drive when the mount fails.
  
  To work around this issue turn off TSM drive cleaning and use
  the cleaning provided by the tape library.  The drive can also
  be cleaned by using the clean drive command.
  

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Fix information

Applicable component levels