On 04/13/11 9:51 PM, Emmanuel Noobadmin wrote: > I'm was stuck trying to decide whether to go for the cheaper RAID 5 > setup and possibly getting killed by the IOPS penalty and the risk > associated with rebuild time, or figure out a way to use the > recommended RAID 10 setup with a smaller usable capacity for the > budget but do so with the ability to expand in the near future. So > really hoping that it could be done. since this is the centos list, I really didn't want to suggest this, but if I was building a 20 or 40TB or whatever storage server, I do believe I'd be strongly consider using Solaris, or one of its variants like OpenIndiana, with ZFS. ZFS was engineered from the ground up to scale to zetabytes # zpool create archive mirror c2t0d0 c2t1d0 mirror c2t2d0 c2t3d0 mirror c3t0d0 c3t1d0 mirror c3t2d0 c3t2d0 ..... spare c?t?d0 c?t?d0 done. available for use in a few seconds. default mountpoint is /archive # zfs create -o mountpoint=/u01 archive/u01 # zfs create -o mountpoint=/u02 archive/u02 creates a couple more filesystems that share the free space, mounted as /u01 and /u02 adding more disks? # zpool add archive mirror c7t0d0 c7t1d0 mirror c7t2d0 c7t3d0