One Disk Group (Raid 1/10), One Hot Spare; Two Disk Groups (Raid 5), Two Hot Spares - Dell NX3600 Deployment Manual

failures, with the hot spare, there can be three concurrent disk drive failures before read and
write requests cannot be executed.

One Disk Group (RAID 1/10), One Hot Spare

Space This option consists of one RAID 1/10 disk group with two virtual disks and a single hot spare.
The single RAID 1/10 disk group is made up of eleven, 2 TB hard drives. In RAID 1/10, the total
space available for virtual disks is 10 TB as the usable capacity is half of the physical disks in
the disk group. The NAS cluster requires pairs of equal sized virtual disks. Therefore, the disk
group is divided into two 5 TB virtual disks evenly utilizing all available space. You have 10 TB
space to be allocated for the NAS cluster.
High Availability In a RAID 1/10 disk group, the disks are striped and mirrored, providing the best data
availability. A RAID 1/10 disk group can continue to execute read and write requests to all its
virtual disks in the event of a failure of half the physical disks.

Two Disk Groups (RAID 5), Two Hot Spares

Space This option consists of two RAID 5 disk groups with a single virtual disk in each group and two
hot spares. Each RAID 5 disk group is made up of five, 2 TB hard drives. In RAID 5, the available
space in each disk group is 8 TB as one hard disk is allocated for parity. The NAS cluster
requires pairs of equal sized virtual disks. Therefore, each disk group is divided into a single 8
TB virtual disk utilizing all available space in its disk group. You have 16 TB space to be
allocated for the NAS cluster.
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