Overland Storage REO 9000 - Manual (Page 66)

66 X Changing the Volume Setup or Creating Logical Volumes
Overland Storage REO 9000 with ProtectionPAC Software
The following describes how the volumes are arranged in RAID
configurations, depending on the number of disks and their size.
If you are using the 12-disk appliance:
„ RAID 0. Creates three REO Devices. Each REO Device (physical unit
[PU]) is comprised of four disks. Each device provides either 1000 GB
(using 250 GB disks) or 1600 GB (using 400 GB disks) of capacity.
„ RAID 5, without hot spare. Creates two REO Devices. Each REO
Device (PU) is comprised of six disks. Each device provides either 1250
GB (using 250 GB disks) or 2000 GB (using 400 GB disks) of capacity.
„ RAID 5, with hot spare. Creates two REO Devices and one hot-spare
disk. One REO Device (PU) is comprised of six disks and the other is
comprised of five disks. The five-disk device provides either 1000 GB
(using 250 GB disks) or 1600 GB (using 400 GB disks) of capacity, and
the six-disk device provides either 1250 GB (using 250 GB disks) or
2000 GB (using 400 GB disks) of capacity.
If you are using the 24-disk appliance:
„ RAID 0. Creates six REO Devices (three physical units for each host).
Each REO Device (PU) is comprised of four disks. Each device provides
either 1000 GB (using 250 GB disks) or 1600 GB (using 400 GB disks)
of capacity.
„ RAID 5, without hot spare. Creates four REO Devices (two physical
units for each host). Each REO Device (PU) is comprised of six disks.
Each device provides either 1250 GB (using 250 GB disks) or 2000 GB
(using 400 GB disks) of capacity.
„ RAID 5, with hot spare. Creates four REO Devices (two physical
units for each host) and one hot-spare disk for each host. One REO
Device (PU) for each host is comprised of six disks and the other device
for each host is comprised of five disks. The five-disk device provides
either 1000 GB (using 250 GB disks) or 1600 GB (using 400 GB disks)
of capacity, and the six-disk device provides either 1250 GB (using 250
GB disks) or 2000 GB (using 400 GB disks) of capacity.