z/VM: CP Commands and Utilities Reference - z/VM - IBM

QUERY HSA
QUERY HSA
►►
Query
Authorization
Purpose
HSA
Usage Notes
Responses
Privilege Class: B, E
Use QUERY HSA to display all of the starting and ending addresses of the
hardware system area (HSA), and the total amount (in bytes and pages) of HSA
space that is available for use.
1. You can allocate storage for the hardware system area (HSA) as 1 contiguous
block of main storage or many blocks of noncontiguous storage.
2. To change the amount of storage allocated for dynamic I/O changes, you must
change the percentage of allocated hardware system area (HSA) storage on the
CONFIG frame of the system console and then perform an initial machine load
(IML) or power-on reset (POR).
3. For more information about displaying information about HSA space, see the
z/VM: CP Planning and Administration book.
4. To display the approximate number of subchannels, control units, and devices
that you can dynamically add to your system before running out of HSA space,
use the STORAGE operand of the QUERY DYNAMIC_I/O command (page
785).
Response 1 (HSA Space Exists):
820 z/VM: CP Commands and Utilities Reference
To display the starting addresses, lengths, and total available storage space of the
hardware system area (HSA), enter the following:
query hsa
HSA storage currently available:
Starting address = 3F620000 , ending address = 3F7FFFFF.
Starting address = 3F800000 , ending address = 3FBFFFFF.
Starting address = 3FC00000 , ending address = 3FFFFFFF.
Total storage available = 10354688 bytes or 2528 pages.
Ready;
These responses tell you that your hardware system area is divided into 3
segments.
v The first segment starts at address 3F620000 and ends at address 3F7FFFFF.
v The second segment starts at address 3F800000 and ends at address
3FBFFFFF.
v The third segment starts at address 3FC00000 and ends at address 3FFFFFFF.
The last line of the response tells you that there are 10,354,688 bytes or 2528
pages of HSA space available for you to use.
Response 2 (HSA Space Does Not Exist):
►◄