One of the ways (and probably the easiest) to check if a volume is SMS-managed is by using the MVS command:
D SMS,VOL(volser)
Here’s an example:
volume: TST001
Command:
D SMS,VOL(TST001)
The result would be:
RESPONSE=SYST
IGD002I 09:52:24 DISPLAY SMS 382
VOLUME UNIT SYSTEM= 1 STORGRP NAME
TST001 5B22 + SGTSTVL
***************************** LEGEND *****************************
. THE STORAGE GROUP OR VOLUME IS NOT DEFINED TO THE SYSTEM
+ THE STORAGE GROUP OR VOLUME IS ENABLED
- THE STORAGE GROUP OR VOLUME IS DISABLED
* THE STORAGE GROUP OR VOLUME IS QUIESCED
D THE STORAGE GROUP OR VOLUME IS DISABLED FOR NEW ALLOCATIONS ONLY
Q THE STORAGE GROUP OR VOLUME IS QUIESCED FOR NEW ALLOCATIONS ONLY
> THE VOLSER IN UCB IS DIFFERENT FROM THE VOLSER IN CONFIGURATION
SYSTEM 1 = SYST
As we can see from the display, volume TST001 has the unit address 5B22 and is part of the Storage Group SGTSTVL, meaning it’s SMS managed.