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authorNeilBrown <neilb@suse.de>2006-01-06 00:20:52 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-06 08:34:09 -0800
commit4dbcdc751cb25ffca3a8374cbc5ab6de961cc545 (patch)
tree61d1eb6e35c0eec66e5a8610c1f57b1e6eec135c /Documentation/md.txt
parentd9d166c2a9d5d01af34396793950aa695883eed4 (diff)
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[PATCH] md: count corrected read errors per drive
Store this total in superblock (As appropriate), and make it available to userspace via sysfs. Signed-off-by: Neil Brown <neilb@suse.de> Acked-by: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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diff --git a/Documentation/md.txt b/Documentation/md.txt
index fd43fd2cad2f..a3eadf8e1701 100644
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@@ -222,6 +222,17 @@ Each directory contains:
of being recoverred to
This list make grow in future.
+ errors
+ An approximate count of read errors that have been detected on
+ this device but have not caused the device to be evicted from
+ the array (either because they were corrected or because they
+ happened while the array was read-only). When using version-1
+ metadata, this value persists across restarts of the array.
+
+ This value can be written while assembling an array thus
+ providing an ongoing count for arrays with metadata managed by
+ userspace.
+
An active md device will also contain and entry for each active device
in the array. These are named