This is an updated and unmangled version of the patch sent in by Martin
Peschke.  Apparently some drives report Hardware Error sense for
problems which do improve after retrying, so the patch retries these
supposedly "unrecoverable" errors for such devices.

In addition to the IBM ESS drive it adds a blacklist entry for the drive
inside the MPIO HS200 Gigabox.
Signed-off-by: Martin Peschke <mpeschke@de.ibm.com>
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>