> Can someone tell me, how md multipathing works, when a drive fails
> completly ?
Well, if the drive (not the path to it) fails _completely_, it won't be
detected by the md autostart (as it can't find the md superblock).
If it fails completely during runtime, all paths but the last one to it will
be disabled, as a drive failure can't be distinguished from a path failure in
the wonderful 2.4 error handling ;-)
But then, all requests send down the last path will fail, because the target
is broken, not the path.
In short, multipathing doesn't help a bit here; how could it?
> Does this only work with raid-autodetection ?
> When no autodetection is done and a drive is missing, would a raidstart
> kill the raid, since the drives are now available with other devices (sda
> instead of former sdb...) ?
I don't understand your question, sorry.
Sincerely,
Lars Marowsky-Brée <lmb@suse.de>
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