Extending a logical drive, Migrating a logical drive – HP Smart Storage Administrator User Manual
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one RAID 0 logical drive. For more information about RAID 0, see "RAID 0—No fault tolerance (on page
)."
Example command:
=> ctrl slot=1 create type=arrayr0 drives=allunassigned
Extending a logical drive
If the operating system supports logical drive extension, you can use any unassigned capacity on an array
to enlarge one or more of the logical drives on the array.
IMPORTANT:
An array expansion, logical drive extension, or logical drive migration takes
about 15 minutes per gigabyte. While this process is occurring, no other expansion, extension,
or migration can occur simultaneously on the same controller. Controllers that do not support a
battery-backed write cache do not support this process.
Syntax:
<target> modify size=#|max|? [forced]
where <target> is a logical drive.
If the operating system does not support logical drive extension, carrying out this command makes data on
the logical drive unavailable. Therefore, the CLI displays a warning prompt as a safeguard in case you are
using such an operating system. To prevent the prompt from appearing, use the forced parameter.
Example commands:
=> ctrl slot=3 ld 1 modify size=max
=> ctrl slot=4 ld 1 modify size=?
=> ctrl slot=3 ld 2 modify size=500 forced
Migrating a logical drive
This command enables you to adjust the stripe size (data block size) or RAID level of a selected logical drive.
For more information, see "Selecting a RAID method (on page
)."
Consider the following factors before performing a migration:
•
For some RAID-level migrations to be possible, you might need to add one or more drives to the array.
•
For migration to a larger stripe size to be possible, the array might need to contain unused drive space.
This extra space is necessary because some of the larger data stripes in the migrated array are likely to
be filled inefficiently.
IMPORTANT:
An array expansion, logical drive extension, or logical drive migration takes
about 15 minutes per gigabyte. While this process is occurring, no other expansion, extension,
or migration can occur simultaneously on the same controller. Controllers that do not support a
battery-backed write cache do not support this process.
Syntax:
<target> modify [raid=0|1+0|1|5|6|adg|?] [ss=8|16|32|64|128|256|default|?]
where <target> is a logical drive.
The following limitations apply to this command:
•
You cannot simultaneously query the RAID level and the stripe size of any given logical drive.
•
If you do not specify a RAID level for a query or migration, the CLI uses the existing value by default.