Re: [LSF/MM TOPIC] linux servers as a storage server - what's missing?

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> Why would you crash is you have device mapper multipath configured to handle
> path fail over? We have tons of enterprise customers that use that...

cf http://www.spinics.net/lists/linux-scsi/msg56254.html

Basically hot unplug of an sdX can oops on any recent kernel, no
matter what dm stuff you have on top.

> On the broader topic of error handling and so on, I do agree that is always
> an area of concern (how many times to retry, how long time outs need to be,
> when to panic/reboot or propagate up an error code)

Yes, especially the scsi eh stuff escalating to a host reset when
a single drive has gone bad -- even if the HBA is happily doing IO
to other drives, we'll kill access to the whole SAS fabric.

- R.
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