Take the 2-minute tour ×  I have a CentOS box with 10 2TB drives
& an LSI RAID controller, used as an NFS server.  I know I'm
going to use RAID 1 to create 5TB of usable space. But in terms
of performance, reliability & management, which is better,
create a single 5TB array on the controller, or create 5 1TB
arrays and use LVM to regroup them into one (or more) VGs.  I'm
particularly interested in hearing why you would pick one
approach or the other.   share|improve this question Strictly
speaking, you can't make "a single 5TB array" using RAID1 from
10 physical 2TB disks. If you use 5 2TB disks to build a RAID1,
the array will be only 2TB large, but survive up to 4 failing
disks. To make "a single 5TB array" you'll have to use either
RAID 0+1 or RAID 1+0. –  earl Jul 21 '10 at 22:15 You're right,
of course. Interestingly, the RAID software will let me create a
thing it calls a 5TB RAID 1 array. I wonder what it actually is?
–  Jeff Leyser Jul 21 '10 at 22:32 add comment  4 Answers  up
vote 2 down vote accept