ABCs of z/OS System Programming Volume 3 - IBM Redbooks

Tip: Place the SHCDSs on separate volumes to maximize availability. Avoid placing
SHCDSs on volumes for which there might be extensive volume reserve activity.
SHCDS operations
Use the following command to activate your newly defined SHCDS for use by VSAM RLS.
► For the primary and secondary SHCDS, use:
VARY SMS,SHCDS(SHCDS_name),NEW
► For the spare SHCDS, use:
VARY SMS,SHCDS(SHCDS_name),NEWSPARE
To display the used SHCDSs in an active configuration, use:
D SMS,SHCDS
Figure 7-20 displays an example of a SHCDS list in a sysplex.
D SMS,SHCDS
IEE932I 539
IGW612I 17:10:12 DISPLAY SMS,SHCDS
Name Size %UTIL Status Type
WTSCPLX2.VSBOX48 10800Kb 4% GOOD ACTIVE
WTSCPLX2.VSBOX52 10800Kb 4% GOOD ACTIVE
WTSCPLX2.VSBOX49 10800Kb 4% GOOD SPARE
----------------- 0Kb 0% N/A N/A
----------------- 0Kb 0% N/A N/A
----------------- 0Kb 0% N/A N/A
----------------- 0Kb 0% N/A N/A
----------------- 0Kb 0% N/A N/A
----------------- 0Kb 0% N/A N/A
----------------- 0Kb 0% N/A N/A
Figure 7-20 Example of SHCDS display
To delete logically either an active or a spare SHCDS, use:
VARY SMS,SHCDS(SHCDS_name),DELETE
Note: In the VARY SMS,SHCDS commands, the SHCDS name is not fully qualified.
SMSVSAM takes as a default the first two qualifiers, which must always be
SYS1.DFPSHCDS. You must specify only the last two qualifiers as the SHCDS names.
404 ABCs of z/OS System Programming Volume 3