On Thu, 7 Feb 2002, Alan Cox wrote:
> > > Possible, but not required for the initial INQUIRY
> >
> > The Linux SCSI layer performs a single INQUIRY for the device discovery
> > process. It was proposed to shorten this INQUIRY to 36 bytes.
>
> Which is fine. We do a 36 byte inquiry just like windows. If the device
> turns out to be scsi-4 we can do a 56 byte inquiry too. sg can do any size
> of inquiry the app needs
I didn't disagree with this proposal, but just suggested to try it on the
development branch first.
FYI, in SCSI-1, the INQUIRY data was only 5 bytes long followed by vendor
unique. Even with that, the allocation length wasn't so limited.
(Specifications were available in 1985 - 17 years ago).
These 5 bytes are _still_ perfectly compatible with SCSI4/SPC2, providing
that software checks the SCSI version.
This let me think without any risk to be wrong that SCSI devices still in
existence that require to limit INQUIRY to 36 bytes have their firmware
area filled with utter shit.
Gérard.
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