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#!/bin/bash
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#
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# Configuration file for /etc/cron.weekly/raid-check
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#
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# options:
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# ENABLED - must be yes in order for the raid check to proceed
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# CHECK - can be either check or repair depending on the type of
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# operation the user desires. A check operation will scan
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# the drives looking for bad sectors and automatically
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# repairing only bad sectors. If it finds good sectors that
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# contain bad data (meaning that the data in a sector does
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# not agree with what the data from another disk indicates
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# the data should be, for example the parity block + the other
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# data blocks would cause us to think that this data block
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# is incorrect), then it does nothing but increments the
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# counter in the file /sys/block/$dev/md/mismatch_count.
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# This allows the sysadmin to inspect the data in the sector
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# and the data that would be produced by rebuilding the
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# sector from redundant information and pick the correct
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# data to keep. The repair option does the same thing, but
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# when it encounters a mismatch in the data, it automatically
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# updates the data to be consistent. However, since we really
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# don't know whether it's the parity or the data block that's
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# correct (or which data block in the case of raid1), it's
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# luck of the draw whether or not the user gets the right
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# data instead of the bad data. This option is the default
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# option for devices not listed in either CHECK_DEVS or
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# REPAIR_DEVS.
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# CHECK_DEVS - a space delimited list of devs that the user specifically
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# wants to run a check operation on.
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# REPAIR_DEVS - a space delimited list of devs that the user
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# specifically wants to run a repair on.
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# SKIP_DEVS - a space delimited list of devs that should be skipped
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# NICE - Change the raid check CPU and IO priority in order to make
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# the system more responsive during lengthy checks. Valid
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# values are high, normal, low, idle.
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# MAXCONCURENT - Limit the number of devices to be checked at a time.
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# By default all devices will be checked at the same time.
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#
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# Note: the raid-check script intentionaly runs last in the cron.weekly
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# sequence. This is so we can wait for all the resync operations to complete
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# and then check the mismatch_count on each array without unduly delaying
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# other weekly cron jobs. If any arrays have a non-0 mismatch_count after
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# the check completes, we echo a warning to stdout which will then me emailed
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# to the admin as long as mails from cron jobs have not been redirected to
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# /dev/null. We do not wait for repair operations to complete as the
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# md stack will correct any mismatch_cnts automatically.
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#
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# Note2: you can not use symbolic names for the raid devices, such as you
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# /dev/md/root. The names used in this file must match the names seen in
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# /proc/mdstat and in /sys/block.
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ENABLED=yes
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CHECK=check
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NICE=low
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# To check devs /dev/md0 and /dev/md3, use "md0 md3"
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CHECK_DEVS=""
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REPAIR_DEVS=""
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SKIP_DEVS=""
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MAXCONCURRENT=
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