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 <dongwucs@xxxxxxxxx>: > 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 <robin@xxxxxxxxxxxxxxx>: > > On Thu Jan 07, 2010 at 08:41:20PM +0800, dong wu wrote: > > > > > 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 > > -- > > ___ > > ( ' } | Robin Hill <robin@xxxxxxxxxxxxxxx> | > > / / ) | Little Jim says .... | > > // !! | "He fallen in de water !!" | > > > > > -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
