Hi,
About 3 weeks ago we had a malfunction in our IBM TS3200 tape library (a small plastic piece broke inside and the robot was stuck). In order to fix this the technician opened the entire library case and removed the obstacle.
Soon after that I noticed that Drive 1 (out of four installed) is not compressing as always - it dropped from 3:1 on the daily backups to 1.6:1 (same data).
I also noticed a sequence of 4 events in the eventlog that occure twice a day at the same time:
[2872] 12/02/14 18:14:29 Adamm Mover Error: DeviceIo: 01:00:02:00 - Device error 1117 on "\\.\Tape1", SCSI cmd 0a, 1 total errors
[2872] 12/02/14 18:19:29 Adamm Mover Error: DeviceIo: 00:00:02:00 - Retry Logic: Retry logic was engaged on device: IBM ULT3580-HH5
[2872] 12/02/14 18:19:29 Adamm Mover Error: DeviceIo: 01:00:02:00 - Refresh handle on "\\.\Tape1", SCSI cmd 00, new handle 1098, error 0
[2872] 12/02/14 18:19:39 Adamm Mover Error: DeviceIo: 00:00:02:00 - Retry Logic: Original settings restored on device: IBM ULT3580-HH5
The send time it happens is around 23:30
I checked again and again and there are no backups that start or end at these times (there are backups in action during that time).
We're using the Symantec drivers version 5.1.37.0 from 12.02.2008 for the tapes.
All jobs are defined with hardware compression.
I've tried replacing the fabric cable, restart the library and restart the BE server but same results.
Tonight I'll try to use software compression for this tape and see if there's any change.
I don't know if the two problems are related but it all started after the library was taken apart.
Any ideas?