Hi, Sascha.  I don't know how to reduce the timeout, but IPLing the
drives should allow the process to cancel.  I used to just walk back
into the datacenter and flip the power switch, it got me up from my
desk, but you can IPL the drive from the 3584 Web Specialist also.


On 7/2/2012 7:26 AM, Sascha Askani wrote:

Hi everybody,

due to faulty tape drives, we have "lost" some of our LTO4 tape volumes,
i.e. these volumes are no longer readable by any of our other tape
drives. AUDIT VOLUME sometimes stalls at the first file to check and
throws errors and gets reduced to a crawl.

The only way out for us is currently "DELETE VOLUME DISCARDD=YES", but
for obvious reasons, I do a "MOVE DATA" beforehand to rescue the data
that any of the drives is able to read. (No copy pools were yet configured)

Since we have "a couple of" volumes to check, I'd like to get some
insight if it is possible to reduce the SCSI timeout value for the tape
drives, since we have to wait ~15 minutes for a single "CANCEL PROCESS"

I tried:

echo "180" > /sys/class/lin_tape/IBMtapeX/device/timeout

But that didn't work out. Any hints?

* TSM for Linux/x86_64 - Version 6, Release 2, Level 3.100
* RedHat 5
* lin_taped 1.68.0-1

Thanks in advance!


BR,

Sascha