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Chapter 2. Introduction to IBM Flex System V7000 Storage Node
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Draft Document for Review January 29, 2013 12:52 pm
8068ch02-HW Intro.fm
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.
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.
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.
2.5.8 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.
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.
MDisks can be added to a storage pool at any time to increase the capacity of the storage
pool. MDisks can belong in only one storage pool and only MDisks in unmanaged mode can
pool. MDisks can belong in only one storage pool and only MDisks in unmanaged mode can
Note: All object names must begin with a alphabetic character and may not 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.
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.