On Mon, Oct 21, 2002 at 09:19:12PM +0530, MShetty wrote:
> Hi,
>
> Thanks a lot for all the replies
>
> A piece of code I am reading, sends the Inquiry cmd to lun 0 first and then to
> the actual lun to be probed. As only SCSI devices have the concept of luns... I
> think the 1st probe to lun 0 is to check if it is a SCSI device but... on 2nd
> thought the same can be inferred by probing for lun n.
No. SCSI devices, if present on a given target, must have something on
LUN 0. That item on LUN 0 doesn't have to be online, but it has to exist
and respond to the INQUIRY command. LUNs > 0 need not exist.
> I have read something which says that some devices may mess up if probed for
> luns > 0. Is this true ??
Yes. Absolutely. Lots of CD-ROM drives will hard lock when you try and
probe for LUNs > 0.
--
Doug Ledford <dledford@redhat.com> 919-754-3700 x44233
Red Hat, Inc.
1801 Varsity Dr.
Raleigh, NC 27606
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