Re: [PATCH 2.6.13 5/14] sas-class: sas_discover.c Discover process (end devices)

Luben Tuikov
2005-09-13T13:11:32Z

On 09/13/05 05:05, Douglas Gilbert wrote:
> The technique of supporting REPORT_LUNS on lun 0 of
> a target in the case where there is no such device
> (logical unit) is a pretty ugly. It also indicates what
> is really happening: the target device intercepts
> REPORT_LUNS, builds the response and replies on behalf
> of lun 0.
>
> Turns out there are other reasons an application may want
> to "talk" to a target device rather than one of its logical
> units (e.g. access controls and log pages specific to
> the target's transport). Well known lus can be seen with the
> REPORT_LUNS (select_report=1) but there is no mechanism (that
> I am aware of) that allows anyone to access them
> from the user space with linux.
>
>
> References at www.t10.org:
> spc4r01a.pdf [section 8]
> bcc-r00.pdf [bridge controller commands]

Well, I'm certainly glad that Doug is getting involved
and on a SCSI professional level (quoting specs etc.).

We need more SAM (SCSI-3) expertise in linux-scsi and
linux-kernel.

Luben