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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 A file recording the current state of the device in the array
which can be a comma separated list of which can be a comma separated list of
faulty - device has been kicked from active use due to 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 in_sync - device is a fully in-sync member of the array
writemostly - device will only be subject to read writemostly - device will only be subject to read
requests if there are no other options. requests if there are no other options.
This applies only to raid1 arrays. This applies only to raid1 arrays.
blocked - device has failed, metadata is "external", blocked - device has failed, and the failure hasn't been
and the failure hasn't been acknowledged yet. acknowledged yet by the metadata handler.
Writes that would write to this device if Writes that would write to this device if
it were not faulty are blocked. it were not faulty are blocked.
spare - device is working, but not a full member. spare - device is working, but not a full member.
This includes spares that are in the process This includes spares that are in the process
of being recovered to of being recovered to
write_error - device has ever seen a write error.
This list may grow in future. This list may grow in future.
This can be written to. This can be written to.
Writing "faulty" simulates a failure on the device. Writing "faulty" simulates a failure on the device.
@ -379,9 +381,11 @@ Each directory contains:
Writing "writemostly" sets the writemostly flag. Writing "writemostly" sets the writemostly flag.
Writing "-writemostly" clears the writemostly flag. Writing "-writemostly" clears the writemostly flag.
Writing "blocked" sets the "blocked" flag. Writing "blocked" sets the "blocked" flag.
Writing "-blocked" clears the "blocked" flag and allows writes Writing "-blocked" clears the "blocked" flags and allows writes
to complete. to complete and possibly simulates an error.
Writing "in_sync" sets the in_sync flag. 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' This file responds to select/poll. Any change to 'faulty'
or 'blocked' causes an event. or 'blocked' causes an event.