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Where Did My Tape Drive Go?

 
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Pete Randall
Outstanding Contributor

Where Did My Tape Drive Go?

I have a C3000 workstation (HP-UX 11.11) with a standalone DLT8000 tape drive (C6378-69201 40/80GB Fast Wide Differential SCSI DLT 8000 desktop tape drive) attached via a SCSI card in slot 5. I've used it in the past to take backups of the workstation but the drive stopped working quite some time ago (months, maybe even a year).

Anyway, I finally got around to replacing the drive, but ioscan no longer detects it. I replicated the SCSI ID used on the old drive, replaced it using the same cable, and connected it to the same slot, but it is now invisible. I rebooted the workstation and searched for boot devices and it showed up there, but once it finishes rebooting, it's vanished again. Any suggestions?


Pete

Pete
6 REPLIES
Pete Randall
Outstanding Contributor

Re: Where Did My Tape Drive Go?

I forgot to mention that the drivers (tape2, stape) are in the kernel. Things really haven't changed since it used to work.


Pete

Pete
TwoProc
Honored Contributor

Re: Where Did My Tape Drive Go?

I've seen this twice:
a) bad scsi terminator
b) bad power supply in the scsi tape drive, it's enough *at times* to let you see the device, and at other times, when other stuff is spinning the power supply can't hold up it's end of bargain on the scsi chain.
Detectable with a meter, and of course, the specs for what voltages you should be seeing on the connector. Or... get the voltages from a working unit, and compare them to the bad unit. When you have a power supply as a participant in a scsi chain that's marginal, it leads you into all sorts of crazy directions, with red herrings in every possible fishing hole.
We are the people our parents warned us about --Jimmy Buffett
Torsten.
Acclaimed Contributor
Solution

Re: Where Did My Tape Drive Go?

Hi Pete,

I'm not sure if you remember one of the tape related threads last week, but I told there exactly the same behavior because of a single bent pin.

Visible at BCH, invisible from OS.

Hope this helps!
Regards
Torsten.

__________________________________________________
There are only 10 types of people in the world -
those who understand binary, and those who don't.

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Pete Randall
Outstanding Contributor

Re: Where Did My Tape Drive Go?

John,

Thank goodness I didn't have to get that deeply into it - that could have taken a significant amount of time to troubleshoot.


Torsten,

No, I did not see that thread, but you were absolutely right on. Two pairs of pins were sort of pinched in towards each other, like they may have gotten jammed into the same hole. I spread them apart so they lined up and that did it! Thank you, sir.


Pete

Pete
Torsten.
Acclaimed Contributor

Re: Where Did My Tape Drive Go?

You are welcome.

This was the thread:

http://forums.itrc.hp.com/service/forums/questionanswer.do?threadId=1429020

Hope this helps!
Regards
Torsten.

__________________________________________________
There are only 10 types of people in the world -
those who understand binary, and those who don't.

__________________________________________________
No support by private messages. Please ask the forum!

If you feel this was helpful please click the KUDOS! thumb below!   
TwoProc
Honored Contributor

Re: Where Did My Tape Drive Go?

Good catch Torsten!
We are the people our parents warned us about --Jimmy Buffett