I retried rebuilding the array once again from scratch, and this time
checked the syslog messages. The reconstructions process is getting
stuck at a disk block that it can't read. I double checked the block
number by repeating the array creation, and did a bad block scan. No bad
blocks were found. How could the md driver be stuck if the block is fine ?
Supposing that the disk has bad blocks, can I have a raid device on
disks that have badblocks ? Each one of the disks is 400 GB.
Probably not a good idea because if a drive has bad blocks it probably
will have more in the future. But anyway, can I ?
The bad blocks would have to be known to the md driver.
Daniel Santos wrote:
Hello,
I had a raid 5 array on three disks. Because of a hardware problem two
disks dissapeared one after the other. I have since been trying to
create a new array with them.
Between the degradation of the two disks I tryied removing one of the
failed disks and re-adding it to the array. When the second disk
failed I noticed the drive numbers on the broken array, and
misteriously a fourth drive appeared on it. Now I have numbers 0,1 and
3, but no number 2.
mdadm tells me that number 3 is a spare.
Now I want to start all over again, but even after zeroing the
superblocks on all three disks, and creation of a new array,
/proc/mdstat shows the same drive numbers, while reconstructing the
third drive.
What should I do ?
Daniel Santos
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