[6127] in linux-scsi channel archive
Re: Guru required: BUSY status
daemon@ATHENA.MIT.EDU (Marc SCHAEFER)
Fri Mar 19 02:00:01 1999
To: linux-scsi@vger.rutgers.edu
From: Marc SCHAEFER <schaefer@alphanet.ch>
Date: 19 Mar 1999 07:53:29 +0100
grant@torque.net wrote:
> According to the SCSI-II spec, a Scanner may not be able to respond
> immediately to a request for data. It is permitted to respond by
> disconnecting and reconnecting at a later time, or by returning
> BUSY status in the status phase.
If it's the only device on the bus, you can always revert to the
catastrophically non-disconnecting mode, by issuing an identify
message of 0x80 instead of 0xC0 (assuming LUN 0).
Of course, if the scanner is really borken (!) it will ignore
your feable attempts to prevent him from disconnecting.
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