From: Jack Wang <xjtuwjp@gmail.com>
To: NeilBrown <neilb@suse.de>
Cc: linux-raid@vger.kernel.org
Subject: Re: [RFC] md raid resync counter
Date: Mon, 04 Nov 2013 10:26:42 +0100 [thread overview]
Message-ID: <52776852.3020309@gmail.com> (raw)
In-Reply-To: <20131102104808.47834bdc@notabene.brown>
On 11/02/2013 12:48 AM, NeilBrown wrote:
> On Fri, 01 Nov 2013 13:59:40 +0100 Jack Wang <xjtuwjp@gmail.com> 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
next prev parent reply other threads:[~2013-11-04 9:26 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-01 12:59 [RFC] md raid resync counter Jack Wang
2013-11-01 23:48 ` NeilBrown
2013-11-04 9:26 ` Jack Wang [this message]
2013-11-05 5:12 ` NeilBrown
2013-11-05 9:16 ` Jack Wang
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