Hi All,

over here we have a few TSM servers on Linux (RHEL 7.4) TSM 8.1.1.021 (to be 
upgraded to .100 soon) and we see something new that we never saw on AIX. If 
for some reason a tape gets left in a drive (IBM 3592) the only way to get the 
drive working again in to reboot the drive. Until then TSM is unable to open 
the drive (error 16). Unfortunately we seem to be able to reliably cause severe 
issues in TSM by rebooting a tapedrive:

kernel: NMI watchdog: BUG: soft lockup - CPU#6 stuck for 22s! [dsmserv:6021]

The only way out is to reboot the entire server.

We never had such issues with TSM on AIX… is this something Linux-specific that 
we can hang TSM in non-interuptable routines (kernel space) by simply rebooting 
a tape drive?

-- 

 Met vriendelijke groeten/Kind Regards,

Remco Post
r.post AT plcs DOT nl
+31 6 248 21 622