Re: sd takes drive offline but md does not know

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David Lethe wrote:

What firmware, drivers & BIOS is the LSI controller running, and what is
exact model number?

The card is the SAS3442E-R using the B3 version of the 1068 controller and has the latest public versions of BIOS and IT version of the firmware.

Several things to consider
 - if you enabled SMART rather than telling the controller to enable
SMART for the individual drives, then this will cause a problem
depending on specifics of what you have .. especially if the controller
is running the RAID firmware.
 - There are firmware issues with some LSI chipsets and
driver/bios/MPT-library revision logic which can cause bus resets.   In
this case, the bus reset made the controller think the disk timed out to
whatever I/O operations the LSI controller told it to perform ... so the
controller took disk to offline state.


At this stage I am no longer concerned about using smartmontools - the card has performed flawlessly in all other respects, so I will avoid it in future.

I am concerned that when the drive was offlined, md was not made aware of it. Perhaps this is to be expected?

Unfortunately this machine is in production now, so I cannot really participate in any more testing/debugging.

Regards,

Richard
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