[CentOS] what is difference between "slow initialize" and "patrol read" on RAID?

mcclnx mcc wrote:
> We have DELL server with MD1000 Disk array in it.  O.S. is CENTOS 5.5.
> Recently every time MD1000 "patrol read" start I will get "media error"
> messages on /var/log/message file.
>
> I use MD1000 "slow initialize" to initialize "bad disk" and NO error.
> After "slow initialize" finish, I manually "startup patrol read".  I
> continue get "media error" on /var/log/message.
>
> Anyone know what difference between "slow initialize" and "patrol read"?
>
No, but let me suggest to you that "media error" means just that, a bad
drive.

       mark