Mdadm faulty problem

[Alessio Fattorini]

Hi all,
i have installed mdadm 1.9.0-4sarge1 on my sarge server. I have a
problem, mdadm often sign one disk as faulty. I put this commands:
mdadm /dev/md0 -f /dev/sdb1
mdadm /dev/md0 -r /dev/sdb1
mdadm /dev/md0 -a /dev/sdb1
but nothing.
If i reboot the server, the disk is ok, and i can add to Raid.
I have this problem not  on a server, but a lot, 4 or 5
This situation is not very stable for me, for machine in production..
What can i do? The server have the same motherboard Asus P5ld2 wiht sata
controller Intel ich7r
Can you help me? Thanks in advance.
Alessio
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