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SCSI tape drive "device set to narrow"

Posted on 2014-09-24
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Last Modified: 2014-10-07
Hi Guys,

I've got a 3 different tape drives I'm testing here, an internal LTO-2, external quantum LTO-3 and a sony external AIT-5 drives.

I've got 2 LSI and 1 adapter PCI-e SCSI controllers

It doesn't matter what cable, terminator or controller I use, the drives are always detected as narrow 40MB instead of 80/160/320MB 16bit. I've tried a lot and so far no difference. The scsi controllers ave very little configuration.

Any suggestions?

Alex
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Question by:Alex
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7 Comments
 
LVL 47

Expert Comment

by:dlethe
ID: 40343075
Crappy cables and cables that are too long will do it.   How long is the cable?
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Expert Comment

by:SelfGovern
ID: 40343228
I absolutely agree with dlethe.

I've also seen some cases where a device on the SCSI bus doesn't ack as fast as it's supposed to, and so the controller ends up defaulting to a lower than possible speed for everything.   Is there anything else on the SCSI chain when you're doing your testing?
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LVL 47

Expert Comment

by:dlethe
ID: 40343241
Also ... silly question, but this is an 80-pin cable, right?  Not a 50 or 68-pin?
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Author Comment

by:Alex
ID: 40346049
Hye guys,

it is a 2 or 3 metre long external scsi 68 pin cable from the big to the small connector. The thing is, I tried another drive using the internal scsi connector with a cable that was like 50 cm long and got the same problem. No other scsi devices in this chain and properly terminated.

Odd :/
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LVL 47

Expert Comment

by:dlethe
ID: 40346140
The 68 pin cable is the problem
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Accepted Solution

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Alex earned 0 total points
ID: 40356599
IS was not the cable, it was also not the drive or the controller. It was the computer I was using for it.

I moved everything to a different server, cabled just exactly the same and all dives are now detected as wide and 320MB
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Author Closing Comment

by:Alex
ID: 40365558
it works
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