Solaris: tape drive error "LUN communication failure"

Is the dump hanging? From the data above, it looks like the dump was manually aborted with the kill command.

it wasnt manually aborted. The dump stops each time after a few secondes

In the output above, the first line is "exit". Are you putting the dump into the background and then exiting? That might cause the process group to get sent a TERM signal. Try putting the command "nohup" as the first item on the command line you use. That is, if the command were

dump xyx  &

try this instead

nohup dump xyz &

actually,

the unix engineer told me that he is not able to do backups (with backup scripts).  So I have tried to do a backup test


ufsdump 0ucf /dev/rmt/0 /export/home

  DUMP: Date of this level 0 dump: November  3, 2011  3:16:35 PM GMT
  DUMP: Date of last level 0 dump: the epoch
  DUMP: Dumping /dev/md/rdsk/d30 (ACHQSDP01a:/) to /dev/rmt/0.
  DUMP: Mapping (Pass I) [regular files]
  DUMP: Mapping (Pass II) [directories]
  DUMP: Writing 63 Kilobyte records
  DUMP: Estimated 7652 blocks (3.74MB).
  DUMP: Dumping (Pass III) [directories]
Nov  3 15:16:50 ACHQa scsi: WARNING: /pci@0/pci@0/pci@8/pci@0/pci@8/pci@0/scsi@8 (mpt1):
Nov  3 15:16:50 ACHQa      Target 0 reverting to async. mode
Nov  3 15:16:50 ACGQa scsi: WARNING: /pci@0/pci@0/pci@8/pci@0/pci@8/pci@0/scsi@8/st@0,0 (st0):
Nov  3 15:16:50 ACHQa      Error for Command: write                   Error Level: Fatal
Nov  3 15:16:50 ACHQa scsi:        Requested Block: 0                         Error Block: 0
  DUMP: Write error 0 feet into tape 1
Nov  3 15:16:50 ACHQa scsi:        Vendor: HP                                 Serial Number:    9   $DR-1
  DUMP: NEEDS ATTENTION: Do you want to restart?: ("yes" or "no") Nov  3 15:16:50 ACHQSDP01a scsi:      Sense Key: Aborted Command
Nov  3 15:16:50 ACHQa scsi:        ASC: 0x47 (data phase crc error detected), ASCQ: 0x1, FRU: 0x0





bash-3.00# exit
  DUMP: SIGTERM()  try rewriting
  DUMP: The ENTIRE dump is aborted.
  DUMP: SIGTERM()  try rewriting
  DUMP: Rewriting attempted as response to unknown signal.
  DUMP: Rewriting attempted as response to unknown signal.
Nov  3 15:17:41 ACHQa scsi: WARNING: /pci@0/pci@0/pci@8/pci@0/pci@8/pci@0/scsi@8/st@0,0 (st0):
Nov  3 15:17:41 ACHQa      Error for Command: release                 Error Level: Fatal
you have mail
# Nov  3 15:17:41 ACHQa scsi:      Requested Block: 0                         Error Block: 0
Nov  3 15:17:41 ACHQa scsi:        Vendor: HP                                 Serial Number:    9   $DR-1
Nov  3 15:17:41 ACHQa scsi:        Sense Key: Aborted Command
Nov  3 15:17:41 ACHQa scsi:        ASC: 0x8 (LUN communication failure), ASCQ: 0x0, FRU: 0x0

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Please verify that you did not change the tape drive recently? it could be that you have wrong scsi id

Also, are you using the right tape media / density?

can you show the command you used?

i didn't change the tape drive recently. I am using the right media.

The command used is

ufsdump 0ucf /dev/rmt/0 /export/home

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, its a command to do a backup test

why do you want to use the c option?

can you use the mt command to test if you can move forward / backward the media in the tape drive?

<i have tried it, I am able to rewind and move forward

what about the c option?

Do you have other media to test with?

if the tape media already have previous backups then can you try listing them?

y es i can list the previous backups

is it by any chance that the tape is full?

tape was empty before I did this test

tar cvf /dev/rmt/0 /export/home

a /export/home/ 0 tape blocks
a /export/home/user/ 0 tape blocks
a /export/home/user/.profile 1 tape blocks
a /export/home/user/local.cshrc 1 tape blocks
a /export/home/user/local.login 1 tape blocks
a /export/home/user/local.profile 1 tape blocks
a /export/home/user/.hushlogin 0 tape blocks
a /export/home/user/.ssh/ 0 tape blocks
a /export/home/user/.ssh/authorized_keys 4 tape blocks
a /export/home/user/.ssh/id_dsa 2 tape blocks
tar: write error: I/O error

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This is possible, try to clean it

i have cleaned it many times

We had to replace the tape drive