Re: dmadm question

[NeilBrown <neilb@suse.de>]

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On 12 Sep 2014 18:49:54 -0700 Luke Odom <luke@lukeodom.com> wrote:

>   I had a raid1 subarray running within an imsm container. One of the drives died so I replaced it. I can get the new drive into the imsm container but I can’t add it to the raid1 array within that container. I’ve read the man page and can’t see to figure it out. Any help would be greatly appreciated. Using mdadm 3.2.5 on debian squeeze. 

This  should just happen automatically.  As soon as you add the device to the
container, mdmon notices and adds it to the raid1.

However it appears not to have happened...

I assume the new drive is exactly the same size as the old drive?
Try removing the new device from md127, run "mdadm --zero" on it, then add it
back again.
Do any messages appear in the kernel logs when you do that?

Is "mdmon md127" running?

NeilBrown


> 
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> root@ds6790:~# cat /proc/mdstat
> Personalities : [raid0] [raid1] [raid10] [raid6] [raid5] [raid4]
> md126 : active raid1 sda[0]
>       976759808 blocks super external:/md127/0 [2/1] [U_]
> 
> 
> 
> 
> md127 : inactive sdb[0](S) sda[1](S)
>       4901 blocks super external:imsm
> 
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> 
> unused devices: <none>
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> root@ds6790:~# mdadm --detail /dev/md126
> /dev/md126:
>       Container : /dev/md127, member 0
>      Raid Level : raid1
>      Array Size : 976759808 (931.51 GiB 1000.20 GB)
>   Used Dev Size : 976759940 (931.51 GiB 1000.20 GB)
>    Raid Devices : 2
>   Total Devices : 1
> 
> 
> 
> 
>           State : active, degraded 
>  Active Devices : 1
> Working Devices : 1
>  Failed Devices : 0
>   Spare Devices : 0
> 
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>            UUID : 1be60edf:5c16b945:86434b6b:2714fddb
>     Number   Major   Minor   RaidDevice State
>        0       8        0        0      active sync   /dev/sda
>        1       0        0        1      removed
> 
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> 
> root@ds6790:~# mdadm --examine /dev/md127
> /dev/md127:
>           Magic : Intel Raid ISM Cfg Sig.
>         Version : 1.1.00
>     Orig Family : 6e37aa48
>          Family : 6e37aa48
>      Generation : 00640a43
>      Attributes : All supported
>            UUID : ac27ba68:f8a3618d:3810d44f:25031c07
>        Checksum : 513ef1f6 correct
>     MPB Sectors : 1
>           Disks : 2
>    RAID Devices : 1
> 
> 
> 
> 
>   Disk00 Serial : 9XG3RTL0
>           State : active
>              Id : 00000002
>     Usable Size : 1953519880 (931.51 GiB 1000.20 GB)
> 
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> 
> 
> [Volume0]:
>            UUID : 1be60edf:5c16b945:86434b6b:2714fddb
>      RAID Level : 1
>         Members : 2
>           Slots : [U_]
>     Failed disk : 1
>       This Slot : 0
>      Array Size : 1953519616 (931.51 GiB 1000.20 GB)
>    Per Dev Size : 1953519880 (931.51 GiB 1000.20 GB)
>   Sector Offset : 0
>     Num Stripes : 7630936
>      Chunk Size : 64 KiB
>        Reserved : 0
>   Migrate State : idle
>       Map State : degraded
>     Dirty State : dirty
> 
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> 
>   Disk01 Serial : XG3RWMF
>           State : failed
>              Id : ffffffff
>     Usable Size : 1953519880 (931.51 GiB 1000.20 GB)
> 
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