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author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2011-08-08 14:56:19 +0900 |
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committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2011-08-08 14:56:19 +0900 |
commit | 18d4ed4342c14ebeebe60d267b171053efcdfa87 (patch) | |
tree | f315e77f66cbb70869e2f80cde5c18380a80901e /Documentation/md.txt | |
parent | 722d0daf2b607a32dad1357bf797e3803484af0a (diff) | |
parent | 22de4534ae12d61257fc0e53d2571686b03305bc (diff) | |
download | talos-op-linux-18d4ed4342c14ebeebe60d267b171053efcdfa87.tar.gz talos-op-linux-18d4ed4342c14ebeebe60d267b171053efcdfa87.zip |
Merge branch 'for-3.1' into for-3.2
Conflict due to the fix for the register map failure - taken the for-3.1
version.
Conflicts:
sound/soc/codecs/sgtl5000.c
Diffstat (limited to 'Documentation/md.txt')
-rw-r--r-- | Documentation/md.txt | 31 |
1 files changed, 24 insertions, 7 deletions
diff --git a/Documentation/md.txt b/Documentation/md.txt index 2366b1c8cf19..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. @@ -419,7 +423,6 @@ Each directory contains: written, it will be rejected. recovery_start - When the device is not 'in_sync', this records the number of sectors from the start of the device which are known to be correct. This is normally zero, but during a recovery @@ -435,6 +438,20 @@ Each directory contains: Setting this to 'none' is equivalent to setting 'in_sync'. Setting to any other value also clears the 'in_sync' flag. + bad_blocks + This gives the list of all known bad blocks in the form of + start address and length (in sectors respectively). If output + is too big to fit in a page, it will be truncated. Writing + "sector length" to this file adds new acknowledged (i.e. + recorded to disk safely) bad blocks. + + unacknowledged_bad_blocks + This gives the list of known-but-not-yet-saved-to-disk bad + blocks in the same form of 'bad_blocks'. If output is too big + to fit in a page, it will be truncated. Writing to this file + adds bad blocks without acknowledging them. This is largely + for testing. + An active md device will also contain and entry for each active device @@ -555,7 +572,7 @@ also have sync_min sync_max The two values, given as numbers of sectors, indicate a range - withing the array where 'check'/'repair' will operate. Must be + within the array where 'check'/'repair' will operate. Must be a multiple of chunk_size. When it reaches "sync_max" it will pause, rather than complete. You can use 'select' or 'poll' on "sync_completed" to wait for |