DEC 4000 AXP Service Manual page 175

ALLCLASS
The ALLCLASS parameter determines the device allocation class. The allocation
class is a numeric value from 0–255 that is used by the OpenVMS AXP operating
system to derive a path-independent name for multiple access paths to the same
device. The ALLCLASS firmware parameter corresponds to the OpenVMS AXP
IOGEN parameter ALLOCLASS.
DSSI devices are shipped from the factory with a default allocation class of zero.
Each device to be served to a cluster must have a nonzero allocation class
that matches the allocation class of the system.
Refer to the VMS VAXcluster manual for rules on specifying allocation class
values.
UNITNUM
The UNITNUM parameter determines the unit number of the device. By default,
the device unit number is supplied by the bus node ID plug on the front panel of
the storage compartment.
Systems using multiple DSSI buses, as described later in this section,
require that the default values be replaced with unique unit numbers.
To set unit numbers and override the default values, you use the
command to supply values to the UNITNUM parameter.
NODENAME
The NODENAME parameter allows each device to have an alphanumeric node
name of up to six characters. DSSI devices are shipped from the factory with a
unique identifier, such as R7CZZC, R7ALUC, and so on. You can provide your
own node name.
SYSTEMID
The SYSTEMID parameter provides a number that uniquely identifies the device
to the operating system. This parameter is modified when you replace a device
using warm-swapping procedures.
Note
Note
System Configuration and Setup 6–37
console
cdp