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[PATCH] md: Allow the write_mostly flag to be set via sysfs

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It appears in /sys/mdX/md/dev-YYY/state
and can be set or cleared by writing 'writemostly' or '-writemostly'
respectively.

Signed-off-by: Neil Brown <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
NeilBrown 2006-06-26 00:28:01 -07:00 • committed by Linus Torvalds
commit f655675b3f
2 changed files with 17 additions and 0 deletions
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5
Documentation/md.txt
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@ -309,6 +309,9 @@ Each directory contains:
faulty - device has been kicked from active use due to
a detected fault
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.
spare - device is working, but not a full member.
This includes spares that are in the process
of being recoverred to
@ -316,6 +319,8 @@ Each directory contains:
This can be written to.
Writing "faulty" simulates a failure on the device.
Writing "remove" removes the device from the array.
Writing "writemostly" sets the writemostly flag.
Writing "-writemostly" clears the writemostly flag.
errors
An approximate count of read errors that have been detected on