On Mon, May 14, 2007 at 06:39:07PM +0200, Bertrik Sikken wrote: > Radha Mohan wrote: > > How to differentiate between a pen drive and a USB HDD using any of > > the descriptors? Both the devices use same driver. I want to know > > whether a device connected is a pen-drive or a USB HDD. > > Perhaps you can do this by looking at the SCSI inquiry data. > I can imagine that a pen drive usually has the 'removeable' bit > (bit 7 of byte 1 in the response the INQUIRY command). > set while a USB HDD does not.
The INQUIRY data is almost completely unreliable. Anything other than the
PDT should be considered suspect. Heck, the PDT should probably be
considered suspectd, too.
Matt
--
Matthew Dharm Home: [EMAIL PROTECTED]
Maintainer, Linux USB Mass Storage Driver
NYET! The evil stops here!
-- Pitr
User Friendly, 6/22/1998
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