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Old 10-31-2008, 05:09 PM
Michael Kahle
 
Default No tar for my tape drive!?!? SAS tape library help...

Any help here would be wonderful. tar will not work on my tape drive! Weirdness... Here is some background.

I recently purchased a new IBM TS2900 Autoloader:
http://www-03.ibm.com/systems/storage/tape/ts2900/index.html

I have hooked up this via an Adaptec SAS 58300:
http://www.adaptec.com/en-US/support/sas/sas/SAS-58300/

After some rough patches getting the Adaptec card to even work. I built a custom kernel (2.6.27.4) with support for this card. I also upgraded my backup system to lenny because I needed some new functionality out of initramfs to load the firmware for this card.

> cat /proc/scsi/scsi
Attached devices:
Host: scsi2 Channel: 00 Id: 00 Lun: 00
Vendor: IBM Model: ULT3580-HH4 Rev: 85V8
Type: Sequential-Access ANSI SCSI revision: 03
Host: scsi2 Channel: 00 Id: 00 Lun: 01
Vendor: IBM Model: 3572-TL Rev: 0003
Type: Medium Changer ANSI SCSI revision: 03

> lsscsi
[2:0:0:0] tape IBM ULT3580-HH4 85V8 /dev/st0
[2:0:0:1] mediumx IBM 3572-TL 0003 /dev/sch0

So far so good.

> mtx -f /dev/sg3 status shows:
Storage Changer /dev/sg3:1 Drives, 9 Slots ( 0 Import/Export )
Data Transfer Element 0:Empty
Storage Element 1:Full :VolumeTag=389ADOL4
Storage Element 2:Full :VolumeTag=385ADOL4
Storage Element 3:Full :VolumeTag=386ADOL4
Storage Element 4:Empty
Storage Element 5:Full :VolumeTag=387ADOL4
Storage Element 6:Empty
Storage Element 7:Full :VolumeTag=388ADOL4
Storage Element 8:Empty
Storage Element 9:Full :VolumeTag=CLNU94L1

Very nice. Let's move a tape into the drive.

> mtx -f /dev/sg3 load 2
Loading media from Storage Element 2 into drive 0...done

Ok. Now lets rewind the tape.

> mt -f /dev/nst0 rewind

No errors. Good. Do we have a tape in the drive? Let's make sure.

> mt -f /dev/nst0 status
SCSI 2 tape drive:
File number=0, block number=0, partition=0.
Tape block size 0 bytes. Density code 0x46 (LTO-4).
Soft error count since last status=0
General status bits on (41010000):
BOT ONLINE IM_REP_EN

Looks good. Time for a sample backup.

> cd /backup/scripts
> ls -l
total 44
-rwxr--r-- 1 root root 623 2006-11-14 03:14 backup2tape.sh
-rwxr--r-- 1 root root 1862 2007-02-06 15:43 backupMichael.sh
-rwxr-xr-x 1 root root 6763 2007-10-18 23:58 backupNetwork.sh
-rwx------ 1 root root 3824 2008-08-26 20:36 backupNetworkTemp.sh
-rwxr-xr-x 1 root root 1035 2008-01-01 20:03 backupVantageYE.sh
-rwxr-xr-x 1 root root 752 2006-10-24 19:18 exclude
lrwxrwxrwx 1 root root 15 2005-12-14 18:57 logs -> /var/log/backup
-rwx------ 1 root root 7137 2008-10-04 19:41 newNetworkBackup.sh
-rwxrwxrwx 1 root root 2413 2007-01-04 00:04 testBackupCapitol.sh
-rwxr-xr-x 1 root root 874 2005-12-09 21:10 z_backupall
> tar cvf /dev/nst0 .
./
./exclude
./logs
./z_backupall
./backup2tape.sh
./backupNetwork.sh
tar: /dev/nst0: Cannot write: Invalid argument
tar: Error is not recoverable: exiting now

HUH? What happened?

> dmesg | tail
st0: Sense Key : Aborted Command [current]
st0: Add. Sense: Initiator response timeout
st0: Can't set default compression.

> tail /var/log/syslog
Oct 31 13:01:51 backup kernel: st0: Sense Key : Aborted Command [current]
Oct 31 13:01:51 backup kernel: st0: Add. Sense: Initiator response timeout
Oct 31 13:01:51 backup kernel: st0: Can't set default compression.

Any thoughts on this? Is there some kind of SAS module I need to have installed? I should be able to use this SAS device just as I use any other SCSI device, correct?

Thanks for your time.

Michael






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