On Fri, 8 Apr 2005, Slartibartfast wrote:
This morning I swapped out the tapes and tried again. Here is the resulting error message. Question is; is this a tape media, or drive error?
At the risk of stating the obvious:
Check ALL your scsi cables and terminators.
The single most common cause for errors on scsi devices is cabling - bad terminators, over-long cables or excessively long device-internal tails.
In some cases, that means bad terminators on the scsi controller card too, so beware(*)
If possible, try putting the tape drive and robot on separate busses - even if you have to put an old cruddy scsi card into the computer to talk to the robot - if you have scsi drives these should be separated out too for this test.
Bear in mind that the robot and tape drive are completely separate devices which happen to live in the same box and the robot is simply taking a few low bandwidth commands to shuttle tapes around the library.
(*) The case which immediately springs to mind is the adaptec 1542 (original, A and B versions, C was fixed) ISA controller, which was notorious for its sensitivity to slightly-out-of-spec scsi cabling. I've run into a few bad PCI controllers too, especially cheap ones which can't handle more than 1 device on the cable...
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