vs80 LTO hardware error with Backup Express

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I'm having difficulty diagnosing exactly what the problem is. A few months ago this 1/8 AutoLoader worked fine, then our trial Backup Software license expired and the unit sat dormant for a couple of months while we sorted out the real license.

Now Backup Express can see the device correctly and everything appears normal but I get errors like this when I try and do simple things like move cartridges from a slot to the drive:

Wed Jun 16 10:52:19 2004 SNBJBC1210D Jukebox vs80: tape in storage slot 5 is being moved to drive 0
Wed Jun 16 10:53:48 2004 SNBDRV1224E sa_move_medium failed: 0XFFFFFFFF
Wed Jun 16 10:53:48 2004 SNBJBC5950E Sense key: Hardware error


I have been trying to use HP_LTT to diagnose the problem but it's not obvious to me what I should be looking for. It passes all the 'Device Analysis' tests. Have also tried replacing all 8 cartridges with brand new ones and ran a head clean on the drive. No difference.

Any suggestions as to what I should look at? I will contact Syncsort as well but I suspect they will say it's a HP issue.

Thanks.

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Sorry just realised there are some other numbers in the Backup Express ssjuker.log file that might be important:

Wed Jun 16 10:52:19 2004 SNBJBC1210D Jukebox vs80: tape in storage slot 5 is being moved to drive 0
Wed Jun 16 10:53:48 2004 SNBDRV1224E sa_move_medium failed: 0XFFFFFFFF
Wed Jun 16 10:53:48 2004 SNBJBC5950E Sense key: Hardware error
Wed Jun 16 10:53:48 2004 SNBJBC5961E Unclassify error: Asc(80) Ascq(93), internal error (0x40809349)
Wed Jun 16 10:53:48 2004 SNBJBC1006E Message JUKER MOUNT processing failed, rc=7473


I don't know if these are Backup Express specific or vs80-related. According to Backup Express support this log file is where the sense codes are written when errors occur.