evacuating drives in a RAID10 array

evacuating drives in a RAID10 array

[Bryan Carmula]

Hi all,

Can anyone provide insight (or point toward appropriate documentation)
on how to evacuate/decommission a drive that is a member of a complex
(non-nested) RAID10 array while keeping data intact? Number of
replicas can be reduced to 1 if necessary; this is a temporary state
as part of a data migration.

$ cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5]
[raid4] [raid10]
md0 : active raid10 sdd1[2] sde1[3] sda1[0] sdc1[1]
      3907023872 blocks 64K chunks 2 near-copies [4/4] [UUUU]
      bitmap: 0/233 pages [0KB], 8192KB chunk

Thanks in advance,
B.C.

Re: evacuating drives in a RAID10 array

[Stan Hoeppner]

On 5/19/2014 11:22 PM, Bryan Carmula wrote:
> Hi all,
> 
> Can anyone provide insight (or point toward appropriate documentation)
> on how to evacuate/decommission a drive that is a member of a complex
> (non-nested) RAID10 array while keeping data intact? Number of
> replicas can be reduced to 1 if necessary; this is a temporary state
> as part of a data migration.
> 
> $ cat /proc/mdstat
> Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5]
> [raid4] [raid10]
> md0 : active raid10 sdd1[2] sde1[3] sda1[0] sdc1[1]
>       3907023872 blocks 64K chunks 2 near-copies [4/4] [UUUU]
>       bitmap: 0/233 pages [0KB], 8192KB chunk

This help request is quite sparse on detail and may limit the number of
folks willing/able to jump in.  You may wish to provide more detail as
to what you're attempting to accomplish in order to widen the field.

Cheers,

Stan