--- On Wed, 20/1/10, Brett Russ <bruss@xxxxxxxxxxx> wrote:
> From: Brett Russ <bruss@xxxxxxxxxxx>
> Subject: Re: Why does one get mismatches?
> To: linux-raid@xxxxxxxxxxxxxxx
> Date: Wednesday, 20 January, 2010, 14:46
> On 01/20/2010 09:34 AM, Jon
> Hardcastle wrote:
> > I will gather the information you require, but so it
> is clear it is a
> > a echo 'check' that is kicking off the ultimate
> mismatch not from
> > boot.
>
> What do you mean by mismatches detected? How is this
> observed?
> -BR
>
cat /sys/block/md4/md/mismatch_cnt
I have a script that i use that runs a 'check' then looks at this value once the check is complete. If it is > 0 it reports this number to me via email and then starts a repair. I am under the impression that the repair - when complete should report (in an ideal world) an identical number indicating that it did indeed find x errors and repaired them. But i am getting differing amount check shows 8 repair shows 12 next run it'll be 24 and 6 so something is up.
I have been able to get the info you asked for using mdadm -E but not with the array stopped. I cant stop it just yet. What would you be looking for in this data?
-----------------------
N: Jon Hardcastle
E: Jon@xxxxxxxxxxxxxxx
'Do not worry about tomorrow, for tomorrow will bring worries of its own.'
***********
Please note, I am phasing out jd_hardcastle AT yahoo.com and replacing it with jon AT eHardcastle.com
***********
-----------------------
/dev/sda1:
Magic : a92b4efc
Version : 0.90.00
UUID : 7438efd1:9e6ca2b5:d6b88274:7003b1d3
Creation Time : Thu Oct 11 00:01:49 2007
Raid Level : raid6
Used Dev Size : 488383936 (465.76 GiB 500.11 GB)
Array Size : 2441919680 (2328.80 GiB 2500.53 GB)
Raid Devices : 7
Total Devices : 7
Preferred Minor : 4
Update Time : Wed Jan 20 12:54:16 2010
State : clean
Active Devices : 7
Working Devices : 7
Failed Devices : 0
Spare Devices : 0
Checksum : b2468ec2 - correct
Events : 1834225
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 5 8 1 5 active sync /dev/sda1
0 0 8 65 0 active sync /dev/sde1
1 1 8 33 1 active sync /dev/sdc1
2 2 8 97 2 active sync /dev/sdg1
3 3 8 17 3 active sync /dev/sdb1
4 4 8 49 4 active sync /dev/sdd1
5 5 8 1 5 active sync /dev/sda1
6 6 8 81 6 active sync /dev/sdf1
/dev/sdb1:
Magic : a92b4efc
Version : 0.90.00
UUID : 7438efd1:9e6ca2b5:d6b88274:7003b1d3
Creation Time : Thu Oct 11 00:01:49 2007
Raid Level : raid6
Used Dev Size : 488383936 (465.76 GiB 500.11 GB)
Array Size : 2441919680 (2328.80 GiB 2500.53 GB)
Raid Devices : 7
Total Devices : 7
Preferred Minor : 4
Update Time : Wed Jan 20 12:54:16 2010
State : clean
Active Devices : 7
Working Devices : 7
Failed Devices : 0
Spare Devices : 0
Checksum : b2468ece - correct
Events : 1834225
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 3 8 17 3 active sync /dev/sdb1
0 0 8 65 0 active sync /dev/sde1
1 1 8 33 1 active sync /dev/sdc1
2 2 8 97 2 active sync /dev/sdg1
3 3 8 17 3 active sync /dev/sdb1
4 4 8 49 4 active sync /dev/sdd1
5 5 8 1 5 active sync /dev/sda1
6 6 8 81 6 active sync /dev/sdf1
/dev/sdc1:
Magic : a92b4efc
Version : 0.90.00
UUID : 7438efd1:9e6ca2b5:d6b88274:7003b1d3
Creation Time : Thu Oct 11 00:01:49 2007
Raid Level : raid6
Used Dev Size : 488383936 (465.76 GiB 500.11 GB)
Array Size : 2441919680 (2328.80 GiB 2500.53 GB)
Raid Devices : 7
Total Devices : 7
Preferred Minor : 4
Update Time : Wed Jan 20 12:54:16 2010
State : clean
Active Devices : 7
Working Devices : 7
Failed Devices : 0
Spare Devices : 0
Checksum : b2468eda - correct
Events : 1834225
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 1 8 33 1 active sync /dev/sdc1
0 0 8 65 0 active sync /dev/sde1
1 1 8 33 1 active sync /dev/sdc1
2 2 8 97 2 active sync /dev/sdg1
3 3 8 17 3 active sync /dev/sdb1
4 4 8 49 4 active sync /dev/sdd1
5 5 8 1 5 active sync /dev/sda1
6 6 8 81 6 active sync /dev/sdf1
/dev/sdd1:
Magic : a92b4efc
Version : 0.90.00
UUID : 7438efd1:9e6ca2b5:d6b88274:7003b1d3
Creation Time : Thu Oct 11 00:01:49 2007
Raid Level : raid6
Used Dev Size : 488383936 (465.76 GiB 500.11 GB)
Array Size : 2441919680 (2328.80 GiB 2500.53 GB)
Raid Devices : 7
Total Devices : 7
Preferred Minor : 4
Update Time : Wed Jan 20 12:54:16 2010
State : clean
Active Devices : 7
Working Devices : 7
Failed Devices : 0
Spare Devices : 0
Checksum : b2468ef0 - correct
Events : 1834225
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 4 8 49 4 active sync /dev/sdd1
0 0 8 65 0 active sync /dev/sde1
1 1 8 33 1 active sync /dev/sdc1
2 2 8 97 2 active sync /dev/sdg1
3 3 8 17 3 active sync /dev/sdb1
4 4 8 49 4 active sync /dev/sdd1
5 5 8 1 5 active sync /dev/sda1
6 6 8 81 6 active sync /dev/sdf1
/dev/sde1:
Magic : a92b4efc
Version : 0.90.00
UUID : 7438efd1:9e6ca2b5:d6b88274:7003b1d3
Creation Time : Thu Oct 11 00:01:49 2007
Raid Level : raid6
Used Dev Size : 488383936 (465.76 GiB 500.11 GB)
Array Size : 2441919680 (2328.80 GiB 2500.53 GB)
Raid Devices : 7
Total Devices : 7
Preferred Minor : 4
Update Time : Wed Jan 20 12:54:16 2010
State : clean
Active Devices : 7
Working Devices : 7
Failed Devices : 0
Spare Devices : 0
Checksum : b2468ef8 - correct
Events : 1834225
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 0 8 65 0 active sync /dev/sde1
0 0 8 65 0 active sync /dev/sde1
1 1 8 33 1 active sync /dev/sdc1
2 2 8 97 2 active sync /dev/sdg1
3 3 8 17 3 active sync /dev/sdb1
4 4 8 49 4 active sync /dev/sdd1
5 5 8 1 5 active sync /dev/sda1
6 6 8 81 6 active sync /dev/sdf1
/dev/sdf1:
Magic : a92b4efc
Version : 0.90.00
UUID : 7438efd1:9e6ca2b5:d6b88274:7003b1d3
Creation Time : Thu Oct 11 00:01:49 2007
Raid Level : raid6
Used Dev Size : 488383936 (465.76 GiB 500.11 GB)
Array Size : 2441919680 (2328.80 GiB 2500.53 GB)
Raid Devices : 7
Total Devices : 7
Preferred Minor : 4
Update Time : Wed Jan 20 12:54:16 2010
State : clean
Active Devices : 7
Working Devices : 7
Failed Devices : 0
Spare Devices : 0
Checksum : b2468f14 - correct
Events : 1834225
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 6 8 81 6 active sync /dev/sdf1
0 0 8 65 0 active sync /dev/sde1
1 1 8 33 1 active sync /dev/sdc1
2 2 8 97 2 active sync /dev/sdg1
3 3 8 17 3 active sync /dev/sdb1
4 4 8 49 4 active sync /dev/sdd1
5 5 8 1 5 active sync /dev/sda1
6 6 8 81 6 active sync /dev/sdf1
/dev/sdg1:
Magic : a92b4efc
Version : 0.90.00
UUID : 7438efd1:9e6ca2b5:d6b88274:7003b1d3
Creation Time : Thu Oct 11 00:01:49 2007
Raid Level : raid6
Used Dev Size : 488383936 (465.76 GiB 500.11 GB)
Array Size : 2441919680 (2328.80 GiB 2500.53 GB)
Raid Devices : 7
Total Devices : 7
Preferred Minor : 4
Update Time : Wed Jan 20 12:54:16 2010
State : clean
Active Devices : 7
Working Devices : 7
Failed Devices : 0
Spare Devices : 0
Checksum : b2468f1c - correct
Events : 1834225
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 2 8 97 2 active sync /dev/sdg1
0 0 8 65 0 active sync /dev/sde1
1 1 8 33 1 active sync /dev/sdc1
2 2 8 97 2 active sync /dev/sdg1
3 3 8 17 3 active sync /dev/sdb1
4 4 8 49 4 active sync /dev/sdd1
5 5 8 1 5 active sync /dev/sda1
6 6 8 81 6 active sync /dev/sdf1
