IBM Storwize V5010 User Manual

Chapter 4. Storage pools 183
Figure 4-53 shows the setup for a distributed RAID 6 environment. The pool consists of a
single MDisk with 6 disk drives. The spare drives are included in this summary.
Figure 4-53 Array configuration for a distributed RAID 6 with 6 disks
4.3.4 RAID configuration presets
RAID configuration presets are used to configure internal drives. They are based on the
advised values for the RAID level and drive class. Each preset has a specific goal for the
number of drives per array and the number of spare drives to maintain redundancy.
For the best performance with solid-state drives (SSDs), arrays with the same number of
drives are recommended, which is the same design for traditional RAID arrays.
Table 4-1 describes the presets that are used for Flash drives for the IBM Storwize V5000
Gen2 storage system.
Table 4-1 Flash RAID presets
Preset Purpose RAID
level
Drives
per array
goal
Drive
count
(min -
max)
Spare
drive goal
Flash
RAID 5
Protects against a single drive
failure. Data and one stripe of
parity are striped across all array
members.
58 3 - 161
Flash
Distributed
RAID 5
Protects against a single drive
failure. Data and one stripe of
parity are striped across all array
members.
58 3 - 161
Flash
RAID 6
Protects against two drive
failures. Data and two stripes of
parity are striped across all array
members.
612 5 - 161
Flash
Distributed
RAID 6
Protects against two drive
failures. Data and two stripes of
parity are striped across all array
members.
612 5 - 161
Flash
RAID 10
Protects against at least one
drive failure. All data is mirrored
on two array members.
10 8 4 - 16
(even
number of
drives)
1

IBM Storwize V5010 Specifications

General

Brand	IBM
Model	Storwize V5010
Category	Storage
Language	English