On Mon, Aug 30, 2004 at 01:46:32PM -0400, Theodore Ts'o wrote:> a filesystem: if we recover one block this way, the next block will be
> errorred and the filesystem "crashes" anyway. In fact this behaviour
> may masquerade the first warnings that something is going wrong....
If the block gets successfully read after 2 or 3 tries, it might be a
good idea for the kernel to automatically do a forced rewrite of the
block, which should cause the disk to do its own disk block
sparing/reassignment.
Hi Ted,
I agree that this is the theory. In practise however, I've never
seen it work correctly. We've seen several disks with say 1-5 bad
blocks and nothing else, and "dd if=/dev/zero of=/dev/<disk>" doesn't
seem to cure them.
Roger.
--
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