User`s guide

ADD UNIT

second controller will inherit any PREFERRED_PATH settings, and the

two controllers will operate using the preset PREFERRED_PATH options.

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.

Note

Writes may still be performed to a write-protected RAIDset to satisfy a

reconstruct pass or to reconstruct a newly replaced member. However,

write protect will disable the writing of any new data.

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 Stripeset

MAXIMUM_CACHED_TRANSFER=

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)

Note

The PREFERRED_PATH and NOPREFERRED_PATH qualiﬁers are

valid for HSJ and HSD controllers only. The preferred path for HSZ

controllers is determined by the unit number (the target portion of the

unit number–the hundreds place) speciﬁed on the ADD UNIT command.

Command Line Interpreter B–23