Errors on tape drives
Hi,
We are getting a lot of errors on tape drives attached to our Suse linux host
OS is running
SUSE Linux Enterprise Server 11 (x86_64)
VERSION = 11
PATCHLEVEL = 1
and we have Netbackup software running for backups
But we see a lot of errors in the OS logs and Netbackup application team wants us to investigate these .Please see below
Jul 31 05:50:39 PNIOYNBMDS01 kernel: [994667.393761] st3: Sense Key : Medium Error [current]
Jul 31 05:50:39 PNIOYNBMDS01 kernel: [994667.393770] Info fld=0x10000
Jul 31 05:50:39 PNIOYNBMDS01 kernel: [994667.393772] st3: Add. Sense: Unrecovered read error
Jul 31 06:17:21 PNIOYNBMDS01 kernel: [996268.793836] st3: Error d0000 (driver bt 0x0, host bt 0xd).
Jul 31 06:17:21 PNIOYNBMDS01 kernel: [996268.793840] st3: Error on write filemark.
Jul 31 08:24:34 PNIOYNBMDS01 kernel: [1003901.710823] st5: Error d0000 (driver bt 0x0, host bt 0xd).
Jul 31 08:24:34 PNIOYNBMDS01 kernel: [1003901.710826] st5: Error on write filemark.
mt command returns I/O erros which should not be the case in a ideal scenario.
nibackup@PNIOYNBMDS01:~> sudo mt -f /dev/nst5 status
mt: /dev/nst5: rmtopen failed: Device or resource busy
nibackup@PNIOYNBMDS01:~> sudo mt -f /dev/nst6 status
mt: /dev/nst6: rmtopen failed: Input/output error
nibackup@PNIOYNBMDS01:~> sudo mt -f /dev/nst3 status
mt: /dev/nst3: rmtopen failed: Input/output error
nibackup@PNIOYNBMDS01:~> sudo mt -f /dev/nst0 status
mt: /dev/nst0: rmtopen failed: Device or resource busy
tar -rvf /dev/nst9 /usr/openv/netbackup/logs/bptm/log.072412
tar: /dev/nst9: Cannot read: Input/output error
tar: At beginning of tape, quitting now
tar: Error is not recoverable: exiting now
sudo dmesg |grep -i st0
[315578.970760] st0: Sense Key : Medium Error [current]
[315578.970769] st0: Add. Sense: Unrecovered read error
[316485.505277] st0: Error d0000 (driver bt 0x0, host bt 0xd).
[317469.757748] st0: Error d0000 (driver bt 0x0, host bt 0xd).
[318370.811881] st0: Error d0000 (driver bt 0x0, host bt 0xd).
[318370.811885] st0: Error on write filemark.
[422201.848816] st 3:0:1:0: Attached scsi tape st0
[422201.848819] st 3:0:1:0: st0: try direct i/o: yes (alignment 4 B)
[423211.144150] st0: Block limits 1 - 16777215 bytes.
Please if you can suggest on them .backup team has changeda lot of tapes and they also regularly clean their tape drives but the error does not stop and the error is coming on all tape drives configured and we have around 12 tape drives attached to the server
Please if somebody can help on this as we are not able to find much info on this .
Thanks,
Abhishek
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