Re: [PATCH] scsi_lib.c: continue after MEDIUM_ERROR

[Ric Wheeler]

Alan wrote:
> > When libata reports a MEDIUM_ERROR to us, we *know* it's non-recoverable,
> > as the drive itself has already done internal retries (libata uses the
> > "with retry" ATA opcodes for this).
>
> This depends on the firmware. Some of the "raid firmware" drives don't
> appear to do retries in firmware.

I think that even for these devices, the actual drives behind the controller 
will do retries. In any case, it would be reasonable to be able to set this 
retry/no-retry via /sys to handle exceptional cases...

> > But meanwhile, we still have the original issue too, where a single stray
> > bad sector can blow a system out of the water, because the mid-layer
> > currently aborts everything after it from a large merged request.
> >
> > Thus the original patch from this thread.  :)
>
> Agreed


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/