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Tape Path Off-line

AndyRH

ADSM.ORG Senior Member
#1
I have a tape path that goes off-line nearly every day. If I turn it on-line, the drive works fine. Any suggestions as what this might be?

The Details: AIX v5 TSM v5.1 IBM 3494 library, 3590E drive, IBM stickered Brocade switches. The tape in question is one of six being shared with an AS/400, the others do not have this problem. This is a new installation, about 3 months old.
 

heada

ADSM.ORG Moderator
#2
When the drive goes offline, it says why TSM put it offline in the activity log.



Q Path (shows the path offline and when it went offline)



Q Actlog Begintime=(10 minutes before path went offline)



Actlog should tell you basicly why. I have the feeling it is when the AS/400 is accessing the drive and TSM attempts to aquire it. If you know the AS/400 uses a drive at a certian time, put it offline within TSM during that time. Admin schedules would work for this.



-Aaron
 

AndyRH

ADSM.ORG Senior Member
#3
The activity log shows the tape path being polled and then taken off-line after about 25 minutes. We take the drives off-line before the AS/400 uses the drives and bring them back on-line when it completes. That part seems to work fine. I just can not figure out why TSM loses its connection to the drive when the drive is off-line to TSM. This could be a hardware problem, I just tought I would ask and see if anyone else has seen this problem.
 

heada

ADSM.ORG Moderator
#4
Andy,



IF the TSM actlog doesn't show why the path goes into polling mode, then you might want to check at the library level. There is a library monitoring program that comes with ATLDD. What I do, since I have Tivoli TEC, is tell the monitoring program to write to a file and have TEC monitor that file for error conditions. You might want to try this:



mtevent -l /dev/lmcp0 > /usr/local/tsm/3494_monitor.out



(or use whatever file you want as output) It tells you about tape mounts, catagory changes, operator inverventions and the like.



-Aaron
 

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The Spectrum Protect TLA (Three-Letter Acronym): ISP or something else?

  • Every product needs a TLA, Let's call it ISP (IBM Spectrum Protect).

    Votes: 18 18.8%
  • Keep using TSM for Spectrum Protect.

    Votes: 58 60.4%
  • Let's be formal and just say Spectrum Protect

    Votes: 12 12.5%
  • Other (please comement)

    Votes: 8 8.3%

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