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checkarray notes
================
checkarray will run parity checks across all your redundant arrays. By
default, it is configured to run on the first Sunday of each month, at 01:06
in the morning. This is realised by asking cron to wake up every Sunday with
/etc/cron.d/mdadm, but then only running the script when the day of the month
is less than or equal to 7. See #380425.
'check' is a read-only operation, even though the kernel logs may suggest
otherwise.
If while reading, a read error occurs, the check will trigger the normal
response to read errors which is to generate the 'correct' data and try to
write that out - so it is possible that a 'check' will trigger a write.
However in the absence of read errors it is read-only.
-- martin f. krafft <madduck@debian.org> Tue, 01 Aug 2006 12:08:05 +0100
Revision: $Id$
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