One disk has failed in the /dev/md0 on Iglulik.  The RAID is currently running in degraded mode, one disk has no mirror at present.  As long as that drive holds up this is not service affecting.  A new drive has been ordered and should be here Wednesday.

     If the mirrored drive should fail before a replacement arrives, unlikely but not impossible, it contains three partitions, /owncloud which has been decomissioned, /opt/iso which simply holds operating system install images and is not needed unless a new virtual machine is created, and /var/lib/libvirt/images which holds important virtual domain images, these are all backed up elsewhere, so if we lost the entire partition they can be readily restored.

     The drive in question has not completely failed but did develop two bad sectors that for some reason did not automatically map out.  I am attempting to run badblocks now to identify any bad blocks and then will attempt to manually lock them out.  If that succeeds I will restore the drive to the RAID until the new drive arrives.  If not we will operate in degraded mode until that time.  Degraded mode is somewhat slower because in RAID10 arrays Linux reads different strips from both drives along with their stripped drives to effectively get 4x disk speed, in degraded mode it is only 2x.