On Tue, 8 Jul 2008, Gerhard Wiesinger wrote:

On Mon, 7 Jul 2008, Justin Piszcz wrote:

quoted

Hi Gerhard,

It /could/ be the port itself if you have changed the cable and disk..

Yes, but it is very unlikely. I have written TB of data there without any 
problems. Anyway this is my 3rd exchanged SAMSUNG disk ...

quoted

Have you tried loading the disk with dd and seeing if you can reproduce the 
problem? You are getting the same error I get generally, I can recommend 
turning OFF NCQ first and see if the problem goes away.

# Define DISKS.
cd /sys/block
DISKS=$(/bin/ls -1d sd[a-z])

# Disable NCQ on all disks.
echo "Disabling NCQ on all disks..."
for i in $DISKS
do
 echo "Disabling NCQ on $i"
 echo 1 > /sys/block/"$i"/device/queue_depth
done

I tried to disable NCQ on all disks and tried to rebuild the raid, but it 
still failed to rebuild with the same error message.

I also tried the nolapic kernel parameter without success.

/dev/sda:  5 Reallocated_Sector_Ct   0x0033   100   100   010    Pre-fail 
Always       -       0
/dev/sdb:  5 Reallocated_Sector_Ct   0x0033   100   100   010    Pre-fail 
Always       -       0
/dev/sdc:  5 Reallocated_Sector_Ct   0x0033   091   091   010    Pre-fail 
Always       -       413
/dev/sdd:  5 Reallocated_Sector_Ct   0x0033   100   100   010    Pre-fail 
Always       -       0
/dev/sde:  5 Reallocated_Sector_Ct   0x0033   100   100   010    Pre-fail 
Always       -       0
/dev/sdf:  5 Reallocated_Sector_Ct   0x0033   100   100   010    Pre-fail 
Always       -       0

The only thing is that the Reallocated_Sector_Ct is still >0 on /dev/sdc 
(keep in mind this is my 3rd new Samsung disk on /dev/sdc and I had up to 
3000 Reallocated_Sector_Ct on previous disks in < 1 day !!!).

Should I replace the disk a fourth time?

When you search in google you find a lot of threads with the timeout problem. 
Might this be a software issue?

Any ideas?

Please run:

smartctl -t short /dev/sdc
sleep 300
smartctl -t long /dev/sdc

Wait 2-3 hours or more and:

smartctl -a /dev/sdc

Justin.