Under a z/OS GA system with the DEVSUP option NON_VSAM_XTIOT=YES, the command UFILESYS does not display any I/O counts,
i.e. columns from RdCnt to WrByt are empty.
Under a z/OS GA-1 system with the DEVSUP option NON_VSAM_XTIOT=NO, it's working fine.
This is not related to the z/OS release upgrade, as thought.
SMF type 92 records will need to be generated in order to populate the following fields on the UFILESYS display in SYSVIEW:
rdcnt, wrcnt, rdiob, wriob, driob, rdbyt, wrbyt, moves.
On this z/OS GA system, there are no SMF type 92 records as opposed to the z/OS GA-1 system, where those records were collected.