[CentOS] mdadm on reboot

drew einhorn drew.einhorn at gmail.com
Mon Jun 16 13:02:17 UTC 2008


On Mon, Jun 16, 2008 at 12:09 AM, Les Mikesell <lesmikesell at gmail.com>
wrote:

> drew einhorn wrote:
>
>> Hi,
>>
>> I'm in the process of trying mdadm for the first time
>>
>> I've been trying stuff out of tutorials, etc.
>>
>> At this point I know how to create stripes, and mirrors.
>>
>> My stripe is automatically restarting on reboot,
>> but the degraded mirror isn't.
>>
>
> Is the partition type set to FD?
>
>
That's the problem, but now I'm having trouble fixing it.

md1 has a single partitions   md1p1

[drew at funGus ~]$ sudo fdisk /dev/md1

The number of cylinders for this disk is set to 244123680.
There is nothing wrong with that, but this is larger than 1024,
and could in certain setups cause problems with:
1) software that runs at boot time (e.g., old versions of LILO)
2) booting and partitioning software from other OSs
   (e.g., DOS FDISK, OS/2 FDISK)

Command (m for help): p

Disk /dev/md1: 999.9 GB, 999930593280 bytes
2 heads, 4 sectors/track, 244123680 cylinders
Units = cylinders of 8 * 512 = 4096 bytes

    Device Boot      Start         End      Blocks   Id  System
/dev/md1p1               1   244123680   976494718   fd  Linux raid
autodetect

Command (m for help): q

but the attempt to create md2 fails:

[drew at funGus ~]$ sudo mdadm -C -ayes /dev/md2 --level=raid1
--raid-devices=2  missing /dev/md1p1
mdadm: Cannot open /dev/md1p1: No such file or directory
mdadm: create aborted

[drew at funGus ~]$ sudo mdadm -C -ayes /dev/md2 --level=raid1
--raid-devices=2  missing /dev/md1p1
mdadm: Cannot open /dev/md1p1: No such file or directory
mdadm: create aborted

Hmm.  That's right.  I does not exist.

[drew at funGus dev]$ ls -l /dev/md*
brw-r----- 1 root disk 9, 0 Jun 16 06:43 /dev/md0
brw-r----- 1 root disk 9, 1 Jun 16 06:46 /dev/md1
brw-r----- 1 root disk 9, 2 Jun 16 06:48 /dev/md2
[drew at funGus dev]$







>
>
> _______________________________________________
> CentOS mailing list
> CentOS at centos.org
> http://lists.centos.org/mailman/listinfo/centos
>



-- 
Drew Einhorn
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.centos.org/pipermail/centos/attachments/20080616/2ea49fb7/attachment.htm


More information about the CentOS mailing list