Re: Errors with Soft RAID 5 Array, no disks off line
vamythguy wrote:
I have a 4 disk soft RAID-5 array and I'm receiving a ton of
these
messages in the system logs:
Dec 31 17:04:38 tibeaux smartd[2384]: Device: /dev/sda, 3 Offline
uncorrectable sectors
Dec 31 17:04:39 tibeaux smartd[2384]: Device: /dev/sdd, 48 Currently
unreadable (pending) sectors
Best way to fix this, or is it not a problem?
It is a problem. This means that both
drives are starting to develop bad
sectors. Since you have raid 5, you can replace the disk and let the
array rebuild itself. Or keep using those disks, but add a hot spare
disk to the array.
I usually replace the disks as soon as I see smartd complain about them,
but if you wait too much , you risk loosing your data.. Last time I
replaced a disk in such condition, it had over 1600 uncorrectable
sectors, making it impossible to transfer the data to the new disk via
DD, pvmove, cp... Luckily it was just a proxy/gateway/vpn server, so a
reinstall wasnt difficult.
--
Pedro Macedo