On Monday September 4, [EMAIL PROTECTED] wrote:
> 
> This one will really curl your hair.  So, operating with the knowledge
> that the checksum's state of correctness or incorrectness was changing
> all the time, I did this:
> 
> while [ $? != 0 ] ; do
>       mdadm -A /dev/md0 /dev/sd[abcd]1
> done
> 
> after 1,518 trials it successfully assembled.
> 
> *beats head against wall*

I think maybe you should beat the computer against the wall, and then
get it replaced under warranty ...

Something is SERIOUSLY wrong.
As it affects all drives, I suspect the drives are fine.
As that machine doesn't crash instantly, I suspect the cpu/memory is
fine.
Which leaves the controller and cables.
Try
 for i in `seq 1 20`; do
  dd if=/dev/sda of=/tmp/try-$i conv=direct
 done
 for i in `seq 2 20`; do
  cmp -l /tmp/try-1 /tmp/try=$i
 done

and look for a pattern.

NeilBrown

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