In the source code of raid5,when write error,it faulty the disk,not remap
the block. why do it use "remap the block"?

2010/1/8, dong wu [off-list ref]:

If it is written to the same block,will it read error again?
when read error,the low-level attempts a write and remap the block if
the write fails.
where does it remap?
Is there any spare block in the disk for remap when read or write error occurs?

2010/1/7, Robin Hill [off-list ref]:

quoted

On Thu Jan 07, 2010 at 08:41:20PM +0800, dong wu wrote:

quoted

when read error and can rewrite,where do we rewrite?
It can't be rewrited to the old block.
It should be rewrite to other place,where can we find the 'other place'?
In the source code,I don't find the place that should be rewrited to.

It's rewritten to the same block - it's up to the low-level device (the
disk) to attempt a write and transparently remap the block if the write
fails.

Cheers,
   Robin
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