Table 6–3 ISE Parameters
Parameter
Description
ALLCLASS
1
Allocation class. The default value is 0. Set the ALLCLASS value to the allocation
class chosen for the system. Note that shadowed disk devices must be set to a nonzero
allocation class.
FORCENAM
Force name parameter. Determines if the ISE is to use the NODENAME parameter
value instead of the manufacturing name given to the ISE. The value must be 0. If the
value is 1, the ISE uses a generic device name such as RF31x.
FORCEUNI
Force unit parameter. To use UNITNUM as the device unit number, set the FORCEUNI
parameter to 0. The factory default value of 1 uses the DSSI node address (hardwired
on the backplane) as the unit number.
NODENAME
Node name for an ISE. Each ISE has a node name that is stored in EEPROM. The node
name is determined in the manufacturing process and is unique to each ISE. The node
name can be changed depending on the needs of the site.
SYSTEMID
System identification number. All SYSTEMIDs must be unique within the system. Do
not change this parameter when introducing a new ISE to the system.
UNITNUM
Unit number. Specifies a numeric value for the device name. Use a unit number that is
unique within the allocation class to which you are configuring the unit. Follow the unit
numbering scheme described in Section 6.5 or use one that meets the requirements.
1
RF-series devices only
More information is available on ISE parameters in the RF/TF-series installation
guides.
6.6.1 Setting ISE Parameters
Digital Equipment Corporation recommends maintaining a worksheet of the
parameters for all ISEs, as well as the serial number of each ISE. This is
especially important at sites that maintain a set of spare drives that may be
stored for some time before they are used.
The worksheet aids in:
•
Preventing duplicate parameters, which render an ISE unusable until the
duplication is isolated and corrected
•
Finding the parameter settings of a non-operational ISE to create a
replacement unit with identical parameters
Use the ISE parameter worksheets in Appendix B to identify and record critical
parameter names and values. When installing a new ISE, select parameter
values that meet the site ISE configuration or guidelines. Then continue with
Section 6.6.4. When replacing an ISE, make sure the parameters selected are not
being used for another ISE in the configuration.
If the parameter values were not recorded, perform the following steps to extract
the information required from your system:
1.
Enter SHOW DEVICE DI to display the following information:
•
Device name
The device names in the sample output below are $1$DIA22 and
$1$DIA21.
•
NODENAME
Managing Integrated Storage Elements 6–5
