This patch adds support for "One Button Disaster Recovery" devices to the
cciss driver.  (OBDR devices are tape drives which can pretend to be cd-rom
devices temporarily.  Once booted the device can be reverted to a tape drive
and data recovery operations can be automatically begun.)

This is an enhancement request by a vendor/partner working on One Button
Disaster Recovery.
Signed-off-by: Stephen M. Cameron <steve.cameron@hp.com>
Signed-off-by: Mike Miller <mike.miller@hp.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>