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md: update documentation for md/rdev/state sysfs interface 

Previous patches in the bad block series extended behavior of
rdev's 'state' interface but lacked documentation update.
Fix it.

Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
Namhyung Kim 2011-07-28 11:31:48 +10:00 committed by NeilBrown
parent de393cdea6
commit 0b7d83865c
1 changed files with 9 additions and 5 deletions
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14
Documentation/md.txt
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@ -360,18 +360,20 @@ Each directory contains:
A file recording the current state of the device in the array
which can be a comma separated list of
faulty - device has been kicked from active use due to
a detected fault
a detected fault or it has unacknowledged bad
blocks
in_sync - device is a fully in-sync member of the array
writemostly - device will only be subject to read
requests if there are no other options.
This applies only to raid1 arrays.
blocked - device has failed, metadata is "external",
and the failure hasn't been acknowledged yet.
blocked - device has failed, and the failure hasn't been
acknowledged yet by the metadata handler.
Writes that would write to this device if
it were not faulty are blocked.
spare - device is working, but not a full member.
This includes spares that are in the process
of being recovered to
write_error - device has ever seen a write error.
This list may grow in future.
This can be written to.
Writing "faulty" simulates a failure on the device.
@ -379,9 +381,11 @@ Each directory contains:
Writing "writemostly" sets the writemostly flag.
Writing "-writemostly" clears the writemostly flag.
Writing "blocked" sets the "blocked" flag.
Writing "-blocked" clears the "blocked" flag and allows writes
to complete.
Writing "-blocked" clears the "blocked" flags and allows writes
to complete and possibly simulates an error.
Writing "in_sync" sets the in_sync flag.
Writing "write_error" sets writeerrorseen flag.
Writing "-write_error" clears writeerrorseen flag.
This file responds to select/poll. Any change to 'faulty'
or 'blocked' causes an event.