Linux/Lin_Tape/Sandiscovery

[janecb]

Hi,

I have compiled the latest Lin_tape and installed lin_taped on my Linux RHEL5 server.. I am using a Netapp Nearstor VTL emulating IBM LTO4 drives. Sandiscovery will not work, and at best will crash the system every few hours or so unless it is turned off - / or set to PASSIVE. When I scan the system, the drives are dicovered and connected to the lin_tape driver:
lin_tape: detected device at host 1, channel 0, id 0, lun 1
IBM ULTRIUM-TD4 022C
lin_tape: successfully attached IBMtape0
lin_tape: detected device at host 1, channel 0, id 0, lun 2
IBM ULTRIUM-TD4 022C
lin_tape: successfully attached IBMtape1
lin_tape: detected device at host 1, channel 0, id 0, lun 3

but as soon as tapes start loading we get various errors:
lin_tape: IBMtape20----51868 tape_logsense_page() unable to do log sense
lin_tape: IBMtape20----51868 tape_logsense_page() unable to do log sense
lin_tape: IBMChgr1-----80401 changer_check_result() sensekey: 6 asc: 28 ascq: 0
lin_tape: IBMtape19----b4fb0 tape_set_all_parms() unable to change recovery timeouts

The crashing has become very annoying - IBM recommends a QLogic hba driver that is not supported by QLogic or RHEL5 (8.01.06) We have 8.02.23 - but that might not be related.

IBM has been studying the information for a while now.. but this is getting very frustrated. The lin_tape compiled without error for my kernel.

Sandiscovery will not adjust the devices as it does on AIX perfectly..

Any suggestions or help would be greatly appreciated.

Jane

 

[Eldoraan]

Were you able to make any progress with IBM or QLogic?

We run into this issue everytime QLogic comes out with new driver version. Last 2 versions I know to work are 8.01.07.15_2 for older kernels and 8.02.14_01 for current kernels. We have a new system go in with SLES10 x86 and SA installed the 8.02.23 and SAN Discovery is broken again. I have PMR open with IBM, waiting for update from them now.

 

[marcinek]

What do You mean "adjust" ? Device names are changing and no automatic "update path"?
Check out persistent names via udev. It is well described in Install and Users guide for lin_tape, or just search this forum, ie here: http://adsm.org/forum/showthread.php?27472-lin_tape-restdrives-yes-and-dev-IBMtape-permissions (first reply)
You can also try to enable "resetdrives" for your library. I know it's mainly used for lanfree and library sharing, but in my case it helped even I do not run such configuration.

If your system is crashing, can you post last /var/log/messages entries? If there is nothong interesting, enable kdump and check "log" in vmcore.