To specify a device
name, use a generic device type unit name, such as 3390, rather than
a group name, such as SYSDA.
To determine the memory
requirements, SAS must look up the device characteristics for the
specified unit name. A group name might represent multiple device
types, which makes it impossible to predict on which device type the
sort work files are allocated and what the memory requirements are.
For group names, the
device characteristics of the WORK library are used. Use of these
characteristics can result in a warning message, unless NOSORTDEVWARN
is in effect.