Re: RAID 5+0 support

[Kyle Moffett <mrmacman_g4@mac.com>]

On Jan 19, 2006, at 11:52, govind raj wrote:
> Hi all,
>
> We are using EVMS 2.5.4 on Linux 2.6.12.6 kernel version.
>
> We find that kernel modules are available for RAID0, 1, 5, 1+0 as  
> part of this kernel. But however, we do not find a similar module  
> available for RAID 5+0. Can someone advise us of how we would be  
> able to get this support added into the kernel? If this is not  
> required as a kernel module, how do we create a RAID 5+0 using MD?

Raid math:
RAID(5+0) == RAID(5) + RAID(0)

Commands:

mdadm --create /dev/md0 --level=5 --raid-devices=3 /dev/sda /dev/sdb / 
dev/sdc
mdadm --create /dev/md1 --level=5 --raid-devices=3 /dev/sdd /dev/sde / 
dev/sdf
mdadm --create /dev/md3 --level=0 --raid-devices=2 /dev/md0 /dev/md1

I believe this is all amply documented on a variety of md websites.

Cheers,
Kyle Moffett

-----BEGIN GEEK CODE BLOCK-----
Version: 3.12
GCM/CS/IT/E/U d- s++: a18 C++++>$ ULBX*++++(+++)>$ P++++(+++)>$ L++++ 
(+++)>$ !E- W+++(++) N+++(++) o? K? w--- O? M++ V? PS+() PE+(-) Y+ PGP 
+ t+(+++) 5 X R? !tv-(--) b++++(++) DI+(++) D+++ G e>++++$ h*(+)>++$ r 
%(--)  !y?-(--)
------END GEEK CODE BLOCK------