question about mdadm

question about mdadm

[Edward Hourigan]

Hello!

I have a quick question:
I have a 3 disk RAID5 array using mdadm
I wanted to add 2 new disks, so I ran
mdadm --add /dev/md0 /dev/sdd
mdadm --add /dev/md0 /dev/sde
mdadm --grow --raid-devices=5

I forgot about the partitions, sdd1 and sde1, I'm wondering if this is
going to be a problem, or if sdd and sde will work?
It is currently reshaping the array.  Please advise if possible.
A response would be much appreciated!
Thanks,
Ed Hourigan

Re: question about mdadm

[Andre Noll]

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On 23:46, Edward Hourigan wrote:

> mdadm --add /dev/md0 /dev/sdd
> mdadm --add /dev/md0 /dev/sde
> mdadm --grow --raid-devices=5
> 
> I forgot about the partitions, sdd1 and sde1, I'm wondering if this is
> going to be a problem, or if sdd and sde will work?
> It is currently reshaping the array.  Please advise if possible.
> A response would be much appreciated!

mdadm and the linux raid code don't care whether a component device
of a raid array is a full disk or a partition of a disk. So your
setup won't cause any problems.

However, tools like fdisk which expect a partition table might get
confused. You also might get some error messages at boot time about
invalid partition tables. These are usually harmless though.

Andre
-- 
The only person who always got his work done by Friday was Robinson Crusoe

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