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## SETNAME statement 

The SETNAME  statement is used for proper allocation in a JES3 environment. For tape devices, it tells JES3 which tape device belongs to which library. The SETNAME  statement specifies the relationships between the XTYPE  values (coded in the DEVICE  Statement) and the LDG names (Figure C-2). A SETNAME  statement must be defined for each unique XTYPE  in the device statements. 

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The SETNAME  statement has the following rules: 

GLYPH<SM590000> Each SETNAME  statement has one entry from each LDG category. 

GLYPH<SM590000> The complex-wide library name must be included in all statements. 

GLYPH<SM590000> A library-specific name must be included for XTYPEs  within the referenced library. 

GLYPH<SM590000> The complex-wide device type name must be included for all XTYPEs  of the corresponding device type in the complex. 

GLYPH<SM590000> A library-specific device type name must be included for the XTYPE  associated with the devices within the library. 

Tip: Do not specify esoteric and generic unit names, such as 3492, SYS3480R, and SYS348XR. Also, never use esoteric names, such as TAPE and CART. 

## High watermark setup names 

Use the HWSNAME  statement to define which device names are subsets of other device names. You must specify all applicable varieties. The HWSNAME  command has this syntax: 

HWSNAME,TYPE=( groupname ,{ altname }) 

The variables specify the following information: 

GLYPH<SM590000> The groupname  variable: Specifies a device type valid for a high watermark setup. 

GLYPH<SM590000> The altname  variable: Specifies a list of valid user-supplied or IBM-supplied device names. These are alternative units to be used in device selection. 

Consider the following example: 

HWSNAME,TYPE=(LDGW3495,LDGF4001,LDGF4006,LDG359J,LDG359K,LDG359M,LDG359N,LDJF4001, LDKF4001,LDKF4006) 

The LDG HWSNAME  statements have the following rules: 

GLYPH<SM590000> The complex-wide library name, LDGW3495, must include all other LDG names as alternates. 

GLYPH<SM590000> The library-specific name must include all LDG names for the corresponding library as alternates. When all tape devices of a type within the complex are within a single tape library, the complex-device type name must also be included as an alternative name. 

