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authorNamhyung Kim <namhyung@gmail.com>2011-07-28 05:31:48 +0400
committerNeilBrown <neilb@suse.de>2011-07-28 05:31:48 +0400
commit0b7d83865cb7a60b1768212c1e60b8fd7c280506 (patch)
tree6a2bd09b219504e4ae8649d77eff487191667d24 /Documentation/md.txt
parentde393cdea66cbd63c90725663f400c76faf1b255 (diff)
downloadlinux-0b7d83865cb7a60b1768212c1e60b8fd7c280506.tar.xz
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>
Diffstat (limited to 'Documentation/md.txt')
-rw-r--r--Documentation/md.txt14
1 files changed, 9 insertions, 5 deletions
diff --git a/Documentation/md.txt b/Documentation/md.txt
index 923a6bddce7c..fc94770f44ab 100644
--- a/Documentation/md.txt
+++ b/Documentation/md.txt
@@ -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.