On Sat, 27 Feb 2010 10:10:27 +0100
Piergiorgio Sartor <piergiorgio.sartor@xxxxxxxx> wrote:
> Hi,
>
> > Ok, please run this for each disk in the array:
> >
> > mdadm --examine /dev/(DEVICE)
> >
> > The output would be most readable if you did each array's devices in
> > order, and you can list them on the same command (- - examine takes
> > multiple inputs)
> >
> > If you still think the situation isn't as I described above, post the results.
>
> Well, here it is:
>
> $> mdadm -E /dev/sd[ab]2
> /dev/sda2:
> Magic : a92b4efc
> Version : 1.1
> Feature Map : 0x1
> Array UUID : 54db81a7:b47e9253:7291055e:4953c163
> Name : lvm
> Creation Time : Fri Feb 6 20:17:13 2009
> Raid Level : raid10
> Raid Devices : 2
>
> Avail Dev Size : 624928236 (297.99 GiB 319.96 GB)
> Array Size : 624928000 (297.99 GiB 319.96 GB)
> Used Dev Size : 624928000 (297.99 GiB 319.96 GB)
> Data Offset : 264 sectors
> Super Offset : 0 sectors
> State : clean
> Device UUID : 8f6cd2c4:0efc8286:09ec91c6:bc5014bf
>
> Internal Bitmap : 8 sectors from superblock
> Update Time : Sat Feb 27 10:08:22 2010
> Checksum : 1703ded0 - correct
> Events : 161646
>
> Layout : far=2
> Chunk Size : 64K
>
> Device Role : spare
> Array State : AA ('A' == active, '.' == missing)
> /dev/sdb2:
> Magic : a92b4efc
> Version : 1.1
> Feature Map : 0x1
> Array UUID : 54db81a7:b47e9253:7291055e:4953c163
> Name : lvm
> Creation Time : Fri Feb 6 20:17:13 2009
> Raid Level : raid10
> Raid Devices : 2
>
> Avail Dev Size : 624928236 (297.99 GiB 319.96 GB)
> Array Size : 624928000 (297.99 GiB 319.96 GB)
> Used Dev Size : 624928000 (297.99 GiB 319.96 GB)
> Data Offset : 264 sectors
> Super Offset : 0 sectors
> State : clean
> Device UUID : 6e2763b5:9415b181:e41a9964:b0c21ca6
>
> Internal Bitmap : 8 sectors from superblock
> Update Time : Sat Feb 27 10:08:22 2010
> Checksum : 87d25401 - correct
> Events : 161646
>
> Layout : far=2
> Chunk Size : 64K
>
> Device Role : Active device 0
> Array State : AA ('A' == active, '.' == missing)
>
> And the details too:
>
> $> mdadm -D /dev/md1
> /dev/md1:
> Version : 1.1
> Creation Time : Fri Feb 6 20:17:13 2009
> Raid Level : raid10
> Array Size : 312464000 (297.99 GiB 319.96 GB)
> Used Dev Size : 312464000 (297.99 GiB 319.96 GB)
> Raid Devices : 2
> Total Devices : 2
> Persistence : Superblock is persistent
>
> Intent Bitmap : Internal
>
> Update Time : Sat Feb 27 10:09:24 2010
> State : active
> Active Devices : 2
> Working Devices : 2
> Failed Devices : 0
> Spare Devices : 0
>
> Layout : far=2
> Chunk Size : 64K
>
> Name : lvm
> UUID : 54db81a7:b47e9253:7291055e:4953c163
> Events : 161646
>
> Number Major Minor RaidDevice State
> 0 8 18 0 active sync /dev/sdb2
> 2 8 2 1 active sync /dev/sda2
>
> bye,
>
Thanks for all the details. They help.
It looks like a bug in mdadm which was fixed in 3.1.1. It is only present in
3.0 and 3.0.x (I don't think you said what version of mdadm you are using).
NeilBrown
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