[ClusterLabs] SAN with drbd and pacemaker
kdupke at suse.com
Mon Sep 21 08:43:14 EDT 2015
I'm sorry, I don't know the megaraids that much.
But the more drives you have in one group the more data has to be
accessed in case of a rebuild, with increased potential for another
issue while less performance is available.
Sometimes people recommend in case of an failure to move the data to a
new RAID volume instead of rebuilding the volume. But that needs much
more disks and slots to be available just in case.
Other way to handle this I had in my email, of course creating 3 groups
of 7 disks, or 2 of 9 instead of 1 group of 20 helps, too.
Yes, you 'loose' some capacity but for the sake of reliability and ease
of administration (of the disks).
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