[CentOS] MD raid tools ... did i missed something?

Justin Piszcz jpiszcz at lucidpixels.com
Thu Aug 10 08:07:42 UTC 2006



On Thu, 10 Aug 2006, "Petr \"Qaxi\" Klíma" wrote:

> Hi
>
> I have a degraded array /dev/md2
> =====================================================================
> $ mdadm -D /dev/md2
> /dev/md2:
>        Version : 00.90.01
>  Creation Time : Thu Oct  6 20:31:57 2005
>     Raid Level : raid5
>     Array Size : 221953536 (211.67 GiB 227.28 GB)
>    Device Size : 110976768 (105.84 GiB 113.64 GB)
>   Raid Devices : 3
>  Total Devices : 2
> Preferred Minor : 2
>    Persistence : Superblock is persistent
>
>    Update Time : Thu Aug 10 07:32:45 2006
>          State : dirty, degraded
> Active Devices : 2
> Working Devices : 2
> Failed Devices : 0
>  Spare Devices : 0
>
>         Layout : left-symmetric
>     Chunk Size : 256K
>
>    Number   Major   Minor   RaidDevice State
>       0       0        0       -1      removed
>       1       8       21        1      active sync   /dev/sdb5
>       2       8       37        2      active sync   /dev/sdc5
>           UUID : 4c77d8a9:3952f00b:876ce47a:a65d5522
>         Events : 0.12152695
> =====================================================================
>
>
> I need to add the 3rd partition, so I open documentation 
> http://www.centos.org/docs/4/html/rhel-isa-en-4/s1-storage-rhlspec.html#S2-STORAGE-RAID-DAY2DAY
> (I know the RTFM ;-)
>
> But in chapter 5.9.9.2.
> they want tool caled "raidhotadd"
>
> What was my wonder when it is not included in CentOS 4.3
> =====================================================================
> # yum provides raidhotadd
> Searching Packages:
> Setting up repositories
> update                    100% |=========================|  951 B 00:00
> base                      100% |=========================|  951 B 00:00
> local                     100% |=========================|  951 B 00:00
> Reading repository metadata in from local files
> primary.xml.gz            100% |=========================|  71 kB 00:00
> update    : ################################################## 195/195
> Added 0 new packages, deleted 2 old in 0.32 seconds
> Importing Additional filelist information for packages
> filelists.xml.gz          100% |=========================| 697 kB 00:00
> update    : ################################################## 195/195
> Added 32 new packages, deleted 0 old in 2.51 seconds
> No Matches found
> =====================================================================
>
> How can I repair the MD device?
>
>
> -- 
>
>   Petr Klíma
>
>   e-mail:  qaxi at seznam.cz
>
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> CentOS at centos.org
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>

mdadm /dev/md2 -a /dev/hdd2

To 'hot-add' /dev/hdd2.

Justin.


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