Digital Equipment HSZ40, Справочное руководство

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2–16 ADD UNIT
ADD UNIT
Identifies a device, container, or partition as a host-addressable logical unit. The controller
maps all requests from the host to the logical unit number as requests to the container
specified in the ADD UNIT command.
You must initialize the disk drive or container before you can add it as a unit.
Format
ADD UNIT
unit-number container-name
Parameters
unit-number
A number such as D104, where D represents a device-type letter, 1 is one of the controller
target IDs, and the 4 is a logical unit number (the middle number is always 0).
The device type letter is either “D” for disk containers (including CD–ROMs) or “P” for
passthrough containers created from tape drives and loaders.
The controller target ID must be in the range 0 to 7, and must be one of the IDs set with
the
SET
T
HIS
_
CONTROLLER ID
and
SET
O
THER
_
CONTROLLER ID
commands. You must leave
out the target ID if it is 0, and only use the logical unit number.
The logical unit number must be in the range 0 to 7. You can assign up to eight logical
units for each controller target ID.
Table 2–1 breaks out the components in HSZ unit numbering.
Table 2–1 HSZ Unit Numbering
Unit number Device type Target ID LUN
D401 Disk 4 1
P100 Passthrough 1 0
D5 Disk 0 5
On a partitioned container, all of the partitions must be addressed through a single
controller. Thus, the unit numbers for all partitions on a container must have the same
controller target ID.
container-name
The name of the container that is used to create the unit.