StorageTek 6 manual How the SET Utility Functions, SET Option, Affected HSCs, All Other HSCs

Set

Table 14. HSC State to Run SET Options

SET Option	Affected HSCs	All Other HSCs
ACSDRV	Down	Active
CLNPRFX	Down	Down
COMPRFX	Active	Active
DELDISP	Active	Active
EJCTPAS	Active	Active
FREEZE	Active	Active
HOSTID	Down	Active
HSCLEVEL	Down	Active
MAJNAME	Down	Down
NEWHOST	Active	Active
NNLBDRV	Down	Active
SCRLABL	Active	Active
SLIDRIVS	Down*	Down *
SLISTATN	Down	Active
SMF	Active	Active
TCHNIQE	Down	Down

*In some cases, the SLIDRIVS parameter can be run effectively with the HSC ac- tive. Refer to “Running SET SLIDRIVS With the HSC Active” on page 313 for more details.

If a host has abended, the active flag is left on. If the host cannot be restarted and ended normally, use the SET HSCLEVEL utility to reset the active flag.

How the SET Utility Functions

One of the facilities provided by the SET utility is to change the RESERVE QNAME that was defined during LIBGEN and stored in the CDS. The RESERVE QNAME is used by the HSC and utilities running on each host to ensure that access to the CDS is serialized. The SET utility and HSC use an additional StorageTek-defined RESERVE QNAME to maintain serialization while the customer-defined RESERVE QNAME is being changed.

The SET utility issues two RESERVEs against the CDS prior to an update, consisting of:

•A RESERVE with the StorageTek-defined QNAME ‘‘STKENQNM’’

•A RESERVE using the existing customer-defined QNAME (or the default value of ‘‘STKALSQN’’).

300VM/HSC 6.0 System Programmer’s Guide

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