HP storageworks HSG80 Reference Manual page 163

CAUTION: If the storage subsystem has more than one host connection, access path
must be specified carefully to avoid giving undesirable host connections access to the
unit. The default condition is that access paths to all host connections are enabled. To
restrict host access to a set of host connections, specify
DISABLE_ACCESS_PATH=ALL when the unit is added, then use the SET unit
command to specify the set of host connections that are to have access to the unit.
Enabling the access path to a particular host connection does not override previously
enabled access paths. All access paths previously enabled are still valid; the new host
connection is simply added to the list of connections that can access the unit.
The procedure of restricting access by enabling all access paths and then disabling
selected paths is particularly not recommended because of the potential data/security
breach that occurs when a new host connection is added.
IDENTIFIER=n
NOIDENTIFIER (default)
The IDENTIFIER switch creates a unique unit identifier that makes the unit
visible to the host. This number can be a value between 0–32767.
Identifier is required for OpenVMS operating systems to identify the unit.
MAX_READ_CACHED_TRANSFER_SIZE=n
MAX_READ_CACHED_TRANSFER_SIZE=32 (default)
Sets the largest number of read blocks to be cached by the controller. The
controller will not cache any transfers over the size set. Acceptable values are
0 through 2048.
The MAXIMUM_CACHED_TRANSFER switch affects both read and write-back
cache when set on a controller that has read and write-back caching.
MAX_WRITE_CACHED_TRANSFER_SIZE=n
MAX_WRITE_CACHED_TRANSFE_SIZE=32 (default)
Sets the largest number of write blocks to be cached by the controller. The
controller will not cache any transfers over the size set. Acceptable write block
sizes are 0 through 2048.
The MAXIMUM_CACHED_TRANSFER switch affects both read and write-back
cache when set on a controller that has read and write-back caching.
MAXIMUM_CACHED_TRANSFER_SIZE=n
MAXIMUM_CACHED_TRANSFER_SIZE=32 (default)
Sets the largest number of read and write blocks to be cached by the controller.
The controller will not cache any transfers over the set size. Acceptable read and
write block sizes are 0 through 2048. The
HSG80 Array Controller V8.7 Command Line Interface Reference Guide
SET unit-number
2–147