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August 12th, 2020 15:00
TL2000 and Redhat 6.5: can see tape drives but not seeing changer
TL2000 is fibre zoned to one of my servers. I can see the tape drives, also visible when I do cat /proc/scsi/scsi.
TL2000 is set for Random. I also restarted the TL2000 but that didn't change anything.
How do I get the medium changer to show up as a scsi device?
Is this lack of functionality a Linux problem or a TL2000 problem?
Thanks in advance for any insights you can provide.
bweddell
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August 14th, 2020 07:00
Hi. Thanks for your reply.
I was able to resolve this yesterday by simply reseating both fibre connections to the back of the TL2000. I read somewhere that one of the drives also has the changer "role". If that isn't right, and I saw both tape devices before (from a lsscsi -g or cat /proc/scsi/scsi), what are your thoughts on why the changer would show up after reseating the cables?
DellEMCSupport
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August 13th, 2020 13:00
Hello,
I've been looking through some KBs trying to find an answer on this. Based on this KB, it looks like mtx commands should show the changer. The sample lsscsi output I had to look at didn't show the changer, either. Do you know if it shows up as a /dev/sg* device? This article is also showing me that tape movement would be controlled through mtx commands, as well. I'd have to recommend first confirming that the changer shows up in /dev/ and then issuing the following command to test:
mtx -f /dev/(your device name) inquiry
Hopefully, this is of some use to you. Let me know if there is anything else I can try to help with.
DellEMCSupport
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August 14th, 2020 08:00
I don't have enough information to say why it would behave as such, but the reseat would have essentially cause the device to be redetected. It may have been something as simple as a timeout from the changer, but I'm just speculating. If it shows itself to be a returning problem, it may be worth digging into in greater detail.