Re: [PATCH v2] libata: Simulate REPORT LUNS for ATAPI devices

["Darrick J. Wong" <djwong@us.ibm.com>]

James Bottomley wrote:

> Er, if it's really a CD-ROM, doesn't it need a blacklist entry with
> BLIST_ROM then?  Regardless, MMC is the only standard that seems to be
> inconsistent in this regard.  Anything claiming to conform to SBC will
> need to be explicitly blacklisted if it claims SCSI-3 or higher and
> doesn't support REPORT LUNS.

Sorry, I should have clarified this earlier--the Quantum GoVault is a
removable disk drive, not a CD-ROM.  The device is reminiscent of Zip
disks, but the cartridge is a sealed unit and contains a 2.5" SATA disk
inside; hence it's not a CD-ROM.  So the patch below won't work for me,
because sdev->type == TYPE_DISK.

I wonder if the same sort of REPORT LUNS screw-up might apply to other
ATAPI devices too, such as tape drives.  Since we've seen that
manufacturers of CD-ROMs and removable disks don't implement it, it
would not surprise me if the other ATAPI devices don't either.  But,
that's speculation on my part.

--D