StorageTek 6 manual Unitattr, Unit Attribute UNITATTR Control Statement, UNITATTR Usage

UNITATTR

Unit Attribute (UNITATTR) Control Statement

The UNITATTR statement specifies unit attributes and allows the user to define the model number of transports. A series of UNITATTR statements can be specified and are contained in the definition data set named in the UNITDEF statement. The first statement that matches the requested attributes is used. (Refer to “Unit Attribute Definition (UNITDEF) Command and Control Statement” on page 140 for details on syntax and parameters.) The UNITATTR statement must be placed in the definition data set; it cannot be issued as an operator command.

UNITATTR Usage

UNITATTRs are used to distinguish between devices that are configured as either 3490E or 3590 device types:

•3490E-type

-4490

-9490

-9490EE

-SD-3

-9840

-T9840B

-T9840C

-T9940A

-T9940B.

•3590-type

-SD-3

-9840

-T9840B

-T9840C

-T9940A

-T9940B.

Note: SD-3s, 9840s, T9840Bs, T9840Cs, T9940As, and T9940Bs can be defined as either 3490E or 3590. 3490E-type transports not defined by UNITATTRs are presumed to be 4490 transports; 3590-type transports are presumed to be 9840 transports.

To allow the HSC to operate correctly, the user must specify UNITATTR statements for all nonlibrary transport models that appear to the operating system as 3490E-type and

3590-type devices. For library devices, the model type is determined by the LMU. For newly defined drives, if the LSM has not been online, the model has not been reported by the LMU. Because of this, StorageTek recommends that UNITATTRs be defined for both library and nonlibrary devices.

Note: If you change your transport configuration, you may need to edit the definition data set containing the UNITATTR statements and reload it by issuing the UNITDEF command.

136VM/HSC 6.0 System Programmer’s Guide

1st ed., 6/30/04 - 312579601