Silicon Graphics InfiniteStorage 4000 Series, Configuring And Maintaining

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72 Modifying Your Configuration
The
mapping
parameter defines whether you want the storage management software
to map the volume to a host, or if you want to map the volume to a host later. To allow
the storage management software to map the volume to a host use the
default
parameter. To map the volume to a host later, use the
none
parameter. To map a
volume to a host, use the
set volume logicalUnitNumber
command.
The repository capacity is the actual physical capacity of the thin volume. The value
that you use for the repository capacity is the starting size of the for the physical
component of a thin volume. The minimum capacity that you can define for the
repository must be least 4 GB. The maximum capacity that you can define is 64 TB.
You can use a small starting value for the repository. As data increases in the
repository, additional standard volumes are added to the repository to increase the
capacity. You can either use an existing repository or create a new repository with this
command. The repository capacity is governed by these parameters:
 existingRepositoryLabel
– Use this parameter when you want to
associate the volume with an existing repository volume.
 newRepositoryCapacity
– Use this parameter when you want to create a
new repository volume.
 repositoryMaxCapacity
– Use this parameter to define the maximum size
that you want for the repository volume.
 repositoryExpansionPolicy
– Use this parameter to define whether the
repository volume expands automatically or if you need to expand the repository
volume.
The
warningThresholdPercent
parameter defines when you receive a
warning that the repository volume is nearing maximum capacity. The value for this
parameter is percent of the maximum capacity of the repository volume.
To turn on cache read prefetch, set the
cacheReadPrefect
parameter to
TRUE
.
NOTE
Thin volumes do not use data assurance.
Modifying Your
Configuration For most configurations, after you have created your initial configuration by using the
autoConfigure storageArray
command or the
create volume
command, you must modify the properties of your configuration to make sure that it
performs to meet the requirements for data storage. Use the
set
commands to
modify a storage array configuration. This section describes how to modify these
properties:

The controller clocks

The storage array password

The storage array host type

The storage array cache

The global hot spares