[Linux-cluster] Distributed RAID

[Michael O'Sullivan]

Hi everyone,

I have just read that GFS on mdadm does not work because mdadm is not 
cluster aware. I really hoped to build a n + 1 RAID of the disks I have 
presented to the RHCS nodes via iSCSI. I had a look at DDRAID which is 
old and looks like it only supports 3, 5 and 9 disks in the distributed 
RAID. I currently only have two (multipathed) devices, but I want them 
to be active-active. If I put them into a mirrored logical volume in 
CLVM will this do the trick? Or will I have to install DRDB? Is there 
any more up-to-date distributed RAID options available for when I want 
to make a 2 + 1, 3 +1, etc storage array? There are some posts that say 
this may be available in CLVM soon or that mdadm may be cluster aware 
soon. Any progress on either of these options?

Any help on this would be great. Thanks, Mike