Storage Pools - IBM V7000 Introduction And Implementation Manual

The diagram in Figure 2-13 shows a preferred quorum drive layout for a dual control
enclosure clustered IBM Flex System V7000 Storage Node system.
Figure 2-13 Preferred quorum drive layout
The clustered system automatically forms the quorum disk by taking a small amount of space
from a managed disk (MDisk). It allocates space from up to three different MDisks for
redundancy, although only one quorum disk is active.
If the environment has multiple storage systems, then to avoid the possibility of losing all of
the quorum disks because of a failure of a single storage system, you should allocate the
quorum disk on different storage systems. The preferred internal drives are the ones in the
control enclosure and hot spares. However when an external virtualized storage system is
being managed, it is preferred to have the active quorum disk located on it for better access
when needed. It is possible to manage the quorum disks by using the CLI.

2.6.8 Storage pools

A storage pool is a collection of MDisks (up to 128) that are grouped together to provide
capacity for the creation of the virtual volumes. All MDisks in the pool are split into extents
with the same size. Volumes are then allocated out of the storage pool and are mapped to a
host system.
Names: All object names must begin with an alphabetic character and cannot be numeric.
The name can be a maximum of 63 characters. Valid characters are uppercase (A-Z),
lowercase letters (a-z), digits (0 - 9), underscore (_), period (.), hyphen (-), and space;
however, the names must not begin or end with a space.
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IBM Flex System V7000 Storage Node Introduction and Implementation Guide