if you get an error like this it means the disk is bad,
Check the smart info. I got the same error.
I ran
smartctl -s on /dev/
smartctl --all /dev/
Which told me that the drive had problems
Also the records in and records out should match.
Run :
badblocks /dev/sdc1 < do this for each partition on the drive, Both my raid partitions had bad blocks this is why my drive failed when the upgrade kicked in.
I followed the upgrade guide for 3TB (Guide 2 (3TB MBL))
New WD 3TB drive WD30EFRX my mbl is back on line upgraded. < I had to get a new external encloser usb3 to sata. so that my computer could see the full 3TB.
copying image to disk...
dd: writing to ‘/dev/md0’: Input/output error
362273+0 records in
362272+0 records out
185483264 bytes (185 MB) copied, 486,404 s, 381 kB/s
cp: failed to access ‘/mnt/md0/boot/boot.scr’: Input/output error
./repair_mybooklive.sh: line 359: /mnt/md0/etc/nas/service_startup/ssh: Input/output error
