> Yes I can see that number in SPC-3. Has anyone every seen
> an actual REQUEST SENSE response (sense buffer) anywhere near
> that size? The new "descriptor" sense data format should
> further reduce the size requirement.
Some specialized RAID units do this, IIRC. Very rare.
Every now and then I get a Fibre Channel disk that actually sends back via the
QLogic HBA several continuation responses- that means the sense data is > 64
bytes.
I wouldn't expect this to be anything but rare. Even if you have such data,
it's probably very application specific that you'd *do* anything with it. I
would think 64 is fine. Perhaps one should architect an exception condition
that is similar to AUTOSENSE FAILED, i.e. AUTOSENSE OVERFLOW- it's up to the
HBA to store the 252 bytes of data somewhere until a REQUEST SENSE comes down
to pick it up. And the REQUEST SENSE can have more than enough data space
allocated.
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