I want to test hot-replace when a write error is recorded in a
bad-block log. Here is my steps:
1. create raid5 with 3 disks (sdb sdc sdd), and 1 spare (sde)
2. echo 2097152 512 > /sys/block/md192/md/dev-sdb/bad_blocks /* set 1
badblock from 1G of sdb*/
3. dd if=/dev/zero of=/dev/md192 bs=1M count=1024 seek=2048 /* from 2G of md */
dd if=/dev/zero of=/dev/md192 bs=1M count=1024 seek=2000 /* near to 2G */
No write error happen, sdb is not marked as want_replacement and not
start the rebuild. Anyone help ?
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