User`s guide

SET unit-number
The preferred path qualifier is used only if both controllers are running in a
dual-redundant configuration. If one controller fails, then all the devices will be
made accessible through the remaining controller, ignoring the preferred path
setting.
When the failed controller is restarted, the drives automatically return to the
controller specified by the preferred path qualifier.
Note
The PREFERRED_PATH qualifier may be specified on a single controller,
however, the qualifier will not take effect until a second controller is
added and the two controllers are configured for dual-redundancy. The
second controller will inherit any PREFERRED_PATH settings, and the
two controllers will operate using the preset PREFERRED_PATH options.
READ_CACHE (Default)
NOREAD_CACHE
Enables and disables the controller’s read cache on this unit.
RUN (Default)
NORUN
Enables and disables a unit’s availibility to the host. When RUN (default) is
specified, the devices that make up the unit will be spun up and the unit will be
made available to the host. If NORUN is specified, the devices that make up the
unit will still be spun up, but the unit will not be made available to the host.
WRITE_PROTECT
NOWRITE_PROTECT (Default)
Enables and disables write protection of the unit.
WRITEBACK_CACHE
NOWRITEBACK_CACHE (Default)
Enables and disables the controller’s write-back cache on this unit.
Note
It may take up to 5 minutes to flush unwritten data from the write-back
cache once you disable write-back caching.
Qualifiers for a Unit Created from a RAIDset
MAXIMUM_CACHED_TRANSFER= n
MAXIMUM_CACHED_TRANSFER=32 (Default)
Specifies the maximum size transfer in blocks to be cached by the controller. Any
transfers over this size are not cached. Valid values are 1–1024.
PREFERRED_PATH=THIS_CONTROLLER
PREFERRED_PATH=OTHER_CONTROLLER
NOPREFERRED_PATH (Default)
Command Line Interpreter B–87