If you need 56 bytes for SCSI-4, then why not get 36 bytes, see if the device is SCSI 4, then ask for the 56 bytes if it is.
Look, this issue is going to continue to haunt us as more and more
"emulated SCSI" devices and busses appear. And, no version of windows will
make an initial INQUIRY request for more than 36 bytes. Ever. Which means
that more and more devices will behave that way.
Doesn't the SCSI-II spec call for doing things this way, anyway? Ask for
36, determine how much is available, and then ask for it all? I know they
call out that procedure explicitly for mode pages...
Gerard (I hope that's an acceptable way to spell your name, given that I
don't know how to type the character after the 'G'), I just don't quite
understand your objection here... my concern was that I've been told that
some low-level drivers snoop the data (for some unknown reason), but that's
really my only concern.
Matt
On Wed, Feb 06, 2002 at 11:07:48PM +0100, Gérard Roudier wrote:
>
>
> On Thu, 7 Feb 2002, Alan Cox wrote:
>
> > > A SCSI device that is broken for INQUIRY is definitely broken for SCSI.
> > > FYI, we need at least 56 bytes of INQUIRY data to be possible for SPC2
> > > (SCSI 4).
> >
> > 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.
>
> For now, all SCSI access methods I have ever seen perform a single
> INQUIRY for this scan.
>
> Gérard.
>
> PS:
> Btw, if what you want to say does not fit in your usual 2 lines of text,
> then you should take time to elaborate or just not to post or post later
> when you will have time enough.
--
Matthew Dharm Home: [EMAIL PROTECTED]
Maintainer, Linux USB Mass Storage Driver
My mother not mind to die for stoppink Windows NT! She is rememberink
Stalin!
-- Pitr
User Friendly, 9/6/1998
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