StorageTek Host Software Component 6.0, System Programmer'S Manual

Page: 245 / 718

Chapter 4. Utility Functions 215
1st ed., 6/30/04 - 312579601
For regularly scheduled backups of HSC control data sets, do not specify the CDS
keyword when each CDS copy is not being backed up individually in the same time
frame. The reason for not specifying the CDS keyword is that a CDS switch(es) may
have taken place.
(Primary)
specifies that the primary control data set is to be copied to the SLSBKUP data
set.
(Secondary)
specifies that the secondary control data set is to be copied to the SLSBKUP
data set.
(STandby)
specifies that the standby control data set is to be copied to the SLSBKUP data
set.
Notes:
1. The CDS parameter specifies the CDS currently in that position. For example,
if the primary CDS is disabled and the secondary CDS is running as the
primary, specify Primary (not Secondary) to back up the secondary CDS.
2. Using the CDS parameter is especially useful for libraries operating through a
remote link, such as channel extenders. Should the link drop and the primary
CDS and the secondary CDS complete processing separately, you may bypass
the programmatic algorithm that normally determines the control data set to be
backed up. If you know which data set (primary or secondary) had the most
cartridge processing, then you can select that data set to be processed by the
utility.
OPTion
optionally, allows you to select one of three backup options.
(Copy)
if this parameter is specified, NO block analysis is performed. The backup is
taken from one of the control data sets. This function is a straight copy to the
SLSBKUP data set. /FILE SLSCOPYx statements are not required in the JCL
for this option.
OPTion(Copy) is the default and should be used or defaulted to for
regularly scheduled backups of the HSC control data set.
OPTion(Copy) determines which copy of the CDS is the most current and
copies that CDS copy to the SLSBKUP data set. This dynamic determination of
the current primary CDS is disabled if the CDS keyword is specified.
(Analyze)
this option allows detailed analysis of individual blocks to occur. A reserve is
held against the control data set until the SLSCOPY data sets are made and the
journals are reset. An analysis is made and discrepancies are output to a
Backup