RE: OT] Joerg Schilling flames Linux on his Blog

["Lincoln Dale \(ltd\)" <ltd@cisco.com>]

> "Lincoln Dale \(ltd\)" <ltd@cisco.com> wrote:
> 
> > > But what you claim is simply impossible.
> >
> > wrong. again.
> >
> > look up the man page for udev(8), pay particular attention 
> to the part 
> > that can tie devname into device serial number.
> > take note of the example shown under 'serial'.
> 
> Let me give up here :-(
> 
> If you don't understand that the availability of the device 
> serial number is not a basic SCSI feature, it makes no sense 
> to continue this discussion.

bzzt.

oh but it IS a standard SCSI feature.  unit serial number is part of the
VPD page 80h.
Multipathing software for FC HBAs have made use of this for quite a
while now.

(ok, we're quibbling here - its OPTIONAL for a device to support this -
but i can go back ~7 years of SCSI/FC devices i have here and all
devices i've found do return this...).



cheers,

lincoln.
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