Do not sent 120 TEST UNIT READY requests on generic NOT READY statuses.
Do not sent 120 TEST UNIT READY requests on generic NOT READY statuses.

Some failing disks tend to return vendor-specific ASC/ASCQ codes with
NOT READY sense key.  It caused extremely long recovery attempts, repeating
these 120 TURs (it takes at least 1 minute) for every I/O request.
Instead of that use default error handling, doing just few retries.

Reviewed by:	ken, gibbs
MFC after:	1 month

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