drive is a spare, but I want to make it active - how?

drive is a spare, but I want to make it active - how?

[Tomasz Chmielewski]

I created RAID-10 on 4 drives, and I'm testing it a bit.

I removed one drive, and then added it again.

mdadm --detail says:

         Version : 01.00.03
   Creation Time : Thu Aug 10 10:15:18 2006
      Raid Level : raid10
      Array Size : 779264640 (743.16 GiB 797.97 GB)
     Device Size : 779264640 (371.58 GiB 398.98 GB)
    Raid Devices : 4
   Total Devices : 4
Preferred Minor : 11
     Persistence : Superblock is persistent

     Update Time : Thu Aug 10 13:14:44 2006
           State : active, degraded, resyncing
  Active Devices : 3
Working Devices : 4
  Failed Devices : 0
   Spare Devices : 1

          Layout : near=2, far=1
      Chunk Size : 64K

  Rebuild Status : 39% complete

            Name : 11
            UUID : 3f0bf25c:614339d1:31c006be:e823b74d
          Events : 13

     Number   Major   Minor   RaidDevice State
        0       0        0        0      removed
        1       8       18        1      active sync   /dev/sdb2
        2       8       34        2      active sync   /dev/sdc2
        3       8       50        3      active sync   /dev/sdd2

        4       8        2        -      spare   /dev/sda2


So, I have 4 working devices, which include 3 active devices and one 
spare device.

As I remember, with RAID-1, when I added a spare with "mdadm /dev/mdX -a 
/dev/sdY", I would see a message "hot added /dev/sdY", and state "spare 
rebuilding" in "mdadm --detail" output.

Right now I don't see the spare is being rebuilt? Spare HDD LED doesn't 
blink either, so it would indicate that it's doing nothing.

Why? Is it because the rebuild status is not complete?


-- 
Tomasz Chmielewski
http://wpkg.org

Re: drive is a spare, but I want to make it active - how?

[Tomasz Chmielewski]

Tomasz Chmielewski wrote:
> I created RAID-10 on 4 drives, and I'm testing it a bit.
> 
> I removed one drive, and then added it again.
> 
> mdadm --detail says:
> 
>         Version : 01.00.03
>   Creation Time : Thu Aug 10 10:15:18 2006
>      Raid Level : raid10
>      Array Size : 779264640 (743.16 GiB 797.97 GB)
>     Device Size : 779264640 (371.58 GiB 398.98 GB)
>    Raid Devices : 4
>   Total Devices : 4
> Preferred Minor : 11
>     Persistence : Superblock is persistent
> 
>     Update Time : Thu Aug 10 13:14:44 2006
>           State : active, degraded, resyncing
>  Active Devices : 3
> Working Devices : 4
>  Failed Devices : 0
>   Spare Devices : 1
> 
>          Layout : near=2, far=1
>      Chunk Size : 64K
> 
>  Rebuild Status : 39% complete
> 
>            Name : 11
>            UUID : 3f0bf25c:614339d1:31c006be:e823b74d
>          Events : 13
> 
>     Number   Major   Minor   RaidDevice State
>        0       0        0        0      removed
>        1       8       18        1      active sync   /dev/sdb2
>        2       8       34        2      active sync   /dev/sdc2
>        3       8       50        3      active sync   /dev/sdd2
> 
>        4       8        2        -      spare   /dev/sda2
> 
> 
> So, I have 4 working devices, which include 3 active devices and one 
> spare device.
> 
> As I remember, with RAID-1, when I added a spare with "mdadm /dev/mdX -a 
> /dev/sdY", I would see a message "hot added /dev/sdY", and state "spare 
> rebuilding" in "mdadm --detail" output.
> 
> Right now I don't see the spare is being rebuilt? Spare HDD LED doesn't 
> blink either, so it would indicate that it's doing nothing.
> 
> Why? Is it because the rebuild status is not complete?

All right, it got "spare rebuilding" state after all other drives were 
rebuilt.


-- 
Tomasz Chmielewski
http://wpkg.org