[CentOS] question on software raid

On Fri, 1 Apr 2011, Jerry Geis wrote:

> dmesg is not reporting any issues.
>
> The /proc/mdstat looks fine.
> md0 : active raid1 sdb1[1] sda1[0]
>    X blocks [2/2]  [UU]
>
> however /var/log/messages says:
>
> smartd[3392] Device /dev/sda 20 offline uncorrectable sectors
>
> The machine is running fine.. raid array looks good - what
> is up with smartd?

This page is one I like for understanding SMART attributes.

http://www.z-a-recovery.com/man-smart.htm

Steve