Tell me more ×  Is there a way to periodically verify that a
linux software raid is valid and has no errors? Like a daemon
that would scan all blocks and verify them.  share|improve this
question could somebody with tag edit privs add 'software raid'
as a tag, if they feel so inclined? –  genehack Aug 5 '09 at
3:36 add comment  2 Answers  On Debian (and therefore Ubuntu)
machines, cron runs:   the first Sunday of the month. This does
exactly what you want.  It basically boils down to:  # echo
check > /sys/block/$array/md/sync_action  but with a lot of
sanity around it. Steal it from your nearest Debian install, or
from the mdadm source package.  share|improve this answer On
RHEL and Centos, there is /etc/sysconfig/raid-check which gets
used to check of fix the arrays weekly. Found via – 
becomingwisest Jan 18 '12 at 1:47 add comment  From the the
Linux Software Raid How To:  ...basic example. Running:   should
release a mdadm daemon to monitor /dev/md2. The delay parameter
means that polling will be done in i