Re: Defective DAT drive or D-bus problem?

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From	John-Paul Stewart <jpstewart@sympatico.ca>
Newsgroups	comp.os.linux.hardware
Subject	Re: Defective DAT drive or D-bus problem?
Date	Sat, 4 Jun 2016 21:52:46 -0400
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On 04/06/16 09:40 AM, Haines Brown wrote:
> I installed an old and long unused WangDAT 3100 drive in a Debian Etch
> box by means of an Adaptec 2906 SCSI-PCI adapter card.
[snip]
> $ mt -f /dev/st0 stat
> drive type = 114
> drive status = 318767616
> sense key error = 0
> residue count = 0
> residue count = 0
> file number = -1
> block number = -1

Is there actually a tape in the drive?  File and block numbers of -1 
usually correspond to there being no tape.  If there's one in it, they 
should be 0 to indicate "beginning of tape" or positive numbers to 
indicate any other position.

If there is a tape in there, then it's possible that the drive is not 
correctly sensing the tape's presence or (maybe) that the tape itself is 
bad.

When was the last time you ran a cleaning tape through the DAT drive?  I 
doubt that would affect tape detection, but you never know.

If you can, open up the drive and physically inspect its insides. 
Various types of old tape drives have problems with their internal 
rubber rollers turning to sticky goo with age.  That, in turn, can 
damage tapes when the sticky goo transfers from the roller to the tape 
medium itself.  If that's the case, do NOT run any more tapes through 
the drive (not even a cleaning tape!) until the rollers are replaced.

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Defective DAT drive or D-bus problem? Haines Brown <haines@engels.histomat.net> - 2016-06-04 09:40 -0400
  Re: Defective DAT drive or D-bus problem? John-Paul Stewart <jpstewart@sympatico.ca> - 2016-06-04 21:52 -0400

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