HP NetRAID-4M Controller - Manual (Page 165)

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Working With Single-level Containers
■ Assign a drive letter. See Chapter 6, Working with Container
Attributes, for a description of how to assign a drive letter.
■ Split a mirror set. See Chapter 9, Modifying Containers, for a
description of how to split a mirror set.
■ Unmirror a mirror set. See Chapter 9, Modifying Containers, for
a description of how to unmirror a mirror set.
Working with a RAID-5 Set
A RAID-5 set is a single-level container made up of three or more
equal-sized partitions that reside on different disks. A RAID-5 set is
similar to a stripe set, except that its data is redundant. A RAID-5 set
distributes (stripes) data evenly across its respective partitions in
equal-sized sections called stripes. One stripe of the set of stripes
distributed across the partitions is used for parity data. The parity
stripe is distributed across all disks containing partitions of the
RAID-5 set, so parity operations are evenly divided among all the
partitions in the container. See the Flexible Array Storage Tool User’s
Guide for a complete description of RAID-5 sets and other container
concepts.
To work with a RAID-5 set, you must understand:
■ The RAID-5 set attributes you can specify
■ How to create a RAID-5 set
■ RAID-5 set creation in a NetWare Environment
■ RAID-5 set creation in a UNIX environment
■ Some tasks to perform after creating a RAID-5 set
The following sections discuss each of these topics.
Understanding the RAID-5 Set Attributes You Can Specify
You use the container create raid5 command to create a
RAID-5 set. Before creating a RAID-5 set, consider the following
RAID-5 set attributes you can specify:
■ freespace
■ stripe size
■ raw container cache