Deployment Guide

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.
High Availability A RAID 5 disk group can continue to execute read and write requests to all its virtual disks after a single disk
failure. As long as there is enough time to rebuild between failures, with hot spares, there can be three disk drive
failures before read and write requests cannot be executed.
Two Disk Groups (RAID 6), Zero Hot Spares
Space
This option consists of two RAID 6 disk groups with a single virtual disk in each group and no hot spares. Each
RAID 6 disk group is made up of six, 2 TB hard drives. In RAID 6, the available space in each disk group is 8 TB as
Setting Up Your MD Storage Solution 19