IBM System Storage DS3000, Programming Manual

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Syntax
autoConfigure storageSubsystem hotSpares
Parameters
None.
Notes
When you run the autoconfigure storageSubsystem hotSpares command, the controller firmware
determines the number of hot spares to create based on the total number and type of disk drives in the
storage subsystem. For Fibre Channel disk drives, SATA disk drives, and SAS disk drives, the controller
firmware creates one hot spare for the storage subsystem and one additional hot spare for every 60 disk
drives in the storage subsystem.
Cancel Enhanced Global Mirror Group role reversal
This command automatically defines and configures the hot spares in a storage subsystem. You can run
this command at any time. This command provides the best hot spare coverage for a storage subsystem.
Syntax
autoConfigure storagesubsystem hotSpares
Parameters
None
Change Performance Read Cache application type
This command changes the application type associated with the Performance Read Cache. The
application type can be web server, database, or multimedia. Changing the application type changes the
block size, subblock size, populate on read threshold, and populate on write threshold for the logical
drives underlying the Performance Read Cache.
Syntax
set performanceReadCache [performanceReadCacheName]
usageHint=(webServer|dataBase|fileSystem)
Parameters
Parameter Description
performanceReadCache
The alphanumeric identifier (including - and _) of the
Performance Read Cache for which you want to change
the application type. Enclose the identifier in square
brackets ([ ]). If the Performance Read Cache name
contains special characters or consists only of numbers,
you also must enclose the identifier in double quotation
marks (" ") inside square brackets.
usageHint
The values are based on the typical I/O usage pattern of
the application that is using the Performance Read
Cache. Valid values are
webServer, dataBase
,
or
fileSystem.
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IBM System Storage DS3000, DS4000, and DS5000: Command Line Interface and Script Commands Programming Guide