StorageTek 6 Manual Do Utilizador

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

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. 

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.