Assuring that the DCSS is addressable for your Linux instance

Ubuntu 22.04 LTS z/VM guest

The DCSS address range must not overlap with the storage of you z/VM guest virtual machine.

Procedure

To find out the start and end address of the DCSS, issue the following CP command from a z/VM guest virtual machine with privilege class E:

q nss map

The output gives you the start and end addresses of all defined DCSSs in units of 4-kilobyte pages. For example:

00: FILE FILENAME FILETYPE MINSIZE BEGPAG ENDPAG TYPE CL #USERS PARMREGS VMGROUP 
... 
00: 0011 MONDCSS  CPDCSS   N/A     09000  097FF  SC   R   00003 N/A      N/A 
...

What to do next

If the DCSS overlaps with the guest storage, follow the procedure in Avoiding overlaps with your guest storage.