[90:180] Cannot rewind medium. (Details unknown.)

[Marino Meloni_1]

Can you tell me the barcode of the tape cartridge involved and the drive it was loaded?
Thanks

[Candan BOLUKBAS]

One of my format session log is shown below. Slot list and other failed sessions logs are attached to this reply. Other failed session ended with the same error message.

[Normal] From: MSM@cbsrvydk1.domain.ext "HP:Ultrium 4-SCSI_2_cbsrvydk1" Time: 06.10.2010 17:48:51
Media session 2010/10/06-26 started.

[Normal] From: MMA@cbsrvydk1.domain.ext "HP:Ultrium 4-SCSI_2_cbsrvydk1" Time: 06.10.2010 17:48:51
STARTING Media Agent "HP:Ultrium 4-SCSI_2_cbsrvydk1"

[Normal] From: MMA@cbsrvydk1.domain.ext "HP:Ultrium 4-SCSI_2_cbsrvydk1" Time: 06.10.2010 17:48:53
By: UMA@cbsrvydk1.domain.ext@Changer1:0:0:1
Loading medium from slot 34 to device Tape4:0:1:0C

[Normal] From: MSM@cbsrvydk1.domain.ext "HP:Ultrium 4-SCSI_2_cbsrvydk1" Time: 06.10.2010 17:49:38
Data Protector medium "[FQU533L4] FQU533L4" found.
Initialization allowed.

[Normal] From: MMA@cbsrvydk1.domain.ext "HP:Ultrium 4-SCSI_2_cbsrvydk1" Time: 06.10.2010 17:49:38
Tape4:0:1:0C
Initializing new medium: "[FQU533L4] FQU533L4"

[Normal] From: MSM@cbsrvydk1.domain.ext "HP:Ultrium 4-SCSI_2_cbsrvydk1" Time: 06.10.2010 17:49:42
New medium added to pool: Default LTO-Ultrium
MediumID: 8801000a:4cac8c82:1734:0001
Label: [FQU533L4] FQU533L4
Location:

[Normal] From: MMA@cbsrvydk1.domain.ext "HP:Ultrium 4-SCSI_2_cbsrvydk1" Time: 06.10.2010 17:50:12
By: UMA@cbsrvydk1.domain.ext@Changer1:0:0:1
Unloading medium to slot 34 from device Tape4:0:1:0C

[Normal] From: MMA@cbsrvydk1.domain.ext "HP:Ultrium 4-SCSI_2_cbsrvydk1" Time: 06.10.2010 17:50:35
By: UMA@cbsrvydk1.domain.ext@Changer1:0:0:1
Loading medium from slot 39 to device Tape4:0:1:0C

[Normal] From: MSM@cbsrvydk1.domain.ext "HP:Ultrium 4-SCSI_2_cbsrvydk1" Time: 06.10.2010 17:52:07
Data Protector medium "[FQU538L4] FQU538L4" found.
Initialization allowed.

[Normal] From: MMA@cbsrvydk1.domain.ext "HP:Ultrium 4-SCSI_2_cbsrvydk1" Time: 06.10.2010 17:52:07
Tape4:0:1:0C
Initializing new medium: "[FQU538L4] FQU538L4"

[Major] From: MMA@cbsrvydk1.domain.ext "HP:Ultrium 4-SCSI_2_cbsrvydk1" Time: 06.10.2010 17:52:12
[90:180] Cannot rewind medium. (Details unknown.)

[Major] From: MMA@cbsrvydk1.domain.ext "HP:Ultrium 4-SCSI_2_cbsrvydk1" Time: 06.10.2010 17:52:45
Initialization of medium failed.

[Major] From: MMA@cbsrvydk1.domain.ext "HP:Ultrium 4-SCSI_2_cbsrvydk1" Time: 06.10.2010 17:52:50
[90:180] Cannot rewind medium. (Details unknown.)

[Critical] From: MMA@cbsrvydk1.domain.ext "HP:Ultrium 4-SCSI_2_cbsrvydk1" Time: 06.10.2010 17:52:52
[90:56] Tape4:0:1:0C
Cannot close device (Details unknown.)

[Major] From: MMA@cbsrvydk1.domain.ext "HP:Ultrium 4-SCSI_2_cbsrvydk1" Time: 06.10.2010 17:52:52
[90:64] By: UMA@cbsrvydk1.domain.ext@Changer1:0:0:1
Cannot unload exchanger medium (Details unknown.)

[Normal] From: MMA@cbsrvydk1.domain.ext "HP:Ultrium 4-SCSI_2_cbsrvydk1" Time: 06.10.2010 17:52:52
ABORTED Media Agent "HP:Ultrium 4-SCSI_2_cbsrvydk1"


============================================================================
1 media out of 2 successfully initialized.
============================================================================

Thanks you so much.

[Marino Meloni_1 · Accepted solution]

Hi,

not sure what is occuring here
from the log I still see various hosts accessing at the same time the same device.
Would be good for a troubleshooting point of view to reduce the hosts to the minimum, zoning them out, and creating a dedicated map, and see if reducing the interferences you solve that situation.

Also there are some hosts that are Polling the drives, these hosts should be cheked and all the recommendation in the EBSDesignGuide should be applied

attached is the extract of the log from the LTO showing the time of the error, do not see hw issue here.

[Candan BOLUKBAS]

Thanks, the problem is solved. You are right! Disabling Fiber Channel and adding the register values described in the links above solved polling problem.

Thanks a lot!

[Jan Lisbjerg]

Hi

Just wanted to add, that this post also helped me.

I had problems with a taperobot that made the same error, when trying to change the medium.
This started after I moved the robot to another location.
After the move I had the option to connect both fiber fabrics to each drive, so I did...

The solution was to remove one of the fibers from the tapedrives, so there was only 1 path to each drive again.
The errors then stopped :-)

Regards

Jan Lisbjerg