Re: possible bug - bitmap dirty pages status

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On Wed, Aug 31, 2011 at 5:05 AM, CoolCold <coolthecold@xxxxxxxxx> wrote:

>> root@gamma2:~# cat /proc/mdstat
>> Personalities : [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
>> md3 : active raid1 sdc3[1] sdb3[0]
>>      1443552640 blocks [2/2] [UU]
>>      bitmap: 16/22 pages [64KB], 32768KB chunk

> More details now:
> Array still has 16/22 dirty pages:

> root@gamma2:~# mdadm --examine-bitmap /dev/sdc3

>       Sync Size : 1443552640 (1376.68 GiB 1478.20 GB)
>          Bitmap : 44054 bits (chunks), 189 dirty (0.4%)

But only 189 bits dirty. This means the bits are just distributed
across the disk (which is why you have 16/22 pages dirty).

Any activity on the disk? 189 bits could easily be explained by a
small amount of background disk activity on a disk that big.

--
Paul
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