When we've marked the drive as failed, it may be possible to talk to it
in some limited sense via the administrative case. When the NAND fails,
or the FTL gets confused, I/O commands to the media will fail. But some
vendors have administative commands that can reset the FTL, so avoid
filtering those out. Worst case is the administrative commands will be
rejected by the drive or timeout. Best case is that we can get through
the commands that let us fix the drive and bring it back into service.
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