On 11/02/2013 12:48 AM, NeilBrown wrote:
> On Fri, 01 Nov 2013 13:59:40 +0100 Jack Wang <xjtuwjp@xxxxxxxxx> wrote:
>
>> Hi Neil and all,
>>
>> Is there anyway to know:
>>
>> 1. How often does a raid start to resync?
>
> Look at your logs?
>
>> 2. How many bytes did it resync?
>
> Look at "mismatch_cnt" in sysfs (and multiply by 512).
>
> NeilBrown
>
>
Thanks Neil,
You're always very helpful :)
About the second one. As I checked in my system kernel 3.4.51
when raid is resync:
cat /proc/mdstat
Personalities : [raid1]
md1 : active raid1 dm-1[3] dm-2[2]
23762944 blocks super 1.2 [2/1] [_U]
[==>..................] recovery = 10.7% (2562240/23762944)
finish=7.5min speed=46565K/sec
# cat /sys/block/md1/md/mismatch_cnt
0
cat /sys/block/md1/md/degraded
1
cat /sys/block/md1/md/mismatch_cnt
0
# cat /sys/block/md1/md/sync_completed
8911488 / 47525888
mismatch_cnt is 0, sync_completed look what I want?
Jack
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