Hitachi HPAV for z/OS user guide (HITA737-96006, June 2008)
Table Of Contents
- Contents
- Compatible PAV Function for the XP1024/XP128/XP12000/XP10000
- Overview of Compatible PAV Operations
- Preparing for Compatible PAV Operations
- Performing Compatible PAV Operations
- Monitoring Compatible PAV Activities
- Additional MVS Commands
- GTF I/O Tracing
- Figure 13 Sample Output of Display Command - Compatible PAV Base Device with 5 Aliases
- Figure 14 Sample Output of Display Command - Compatible Hyper PAV with 16 Aliases
- Figure 15 DEVSERV DISPLAY PATHS Command
- Figure 16 Sample DEVSERV QPAV Command (Compatible PAV)
- Figure 17 Sample DEVSERV QPAV Command (Compatible Hyper PAV)
- Figure 18 Sample Output of DEVSERV QPAV,SSID=xxxx Command (Compatible PAV)
- Figure 19 Sample Output of DEVSERV QPAV,SSID=xxxx Command (Compatible Hyper PAV)
- Figure 20 Sample Output of DS QP,xxxx,VOLUME Command (Compatible PAV)
- Figure 21 Sample Output of DS QP,xxxx,VOLUME Command (Compatible Hyper PAV)
- Figure 22 Sample Output of D IOS,HYPERPAV Command
- Using HCD to Define and View XP1024/XP128/XP12000/XP10000 LCUs and Compatible PAV Devices
- Using HCD to Define an XP1024/XP12000/XP10000 LCU and the Base and Alias Devices
- Figure 23 Basic HCD Panel
- Figure 24 Define, Modify, Or View Configuration Data
- Figure 25 Add Control Unit Panel
- Figure 26 Selecting the Operating System
- Figure 27 Select, Change Option
- Figure 28 Control Unit Chpid, CUADD, and Device Address Range Addressing
- Figure 29 Define, Modify, Or View Configuration Data
- Figure 30 I/O Device List
- Figure 31 Add Device
- Figure 32 Device / Processor Definition Panel - Selecting the Processor ID
- Figure 33 Define Device / Processor Panel
- Figure 34 Define Device to OS Configuration Window - Selecting the OS Configuration
- Figure 35 Select / Disconnect Option
- Figure 36 Define Device Parameters / Features
- Displaying Compatible PAV Device Parameters
- Using HCD to Define an XP1024/XP12000/XP10000 LCU and the Base and Alias Devices
- Checking the WLM PAV Settings
- Settings about Compatible Hyper PAV
- Index
12 Compatible PAV Function for the XP1024/XP128/XP12000/XP10000
Figure 1 Flow of I/O Requests Using Compatible PAV
In the above figure, the alias devices A, B and C are assigned to the base device 1, the alias devices D, E
and F are assigned to the base device 2, and the alias devices G, H and I are assigned to the base device
3 within a LCU or CU image. If you use Compatible PAV, only the alias device that is assigned in advance
to each base device works as an alias device.
For example, If I/O requests have converged on the base device 1 when a host computer accesses the
base device 1 by using Compatible PAV, I/O requests will be issued to the alias device A, B or C
automatically. If a host computer accesses similarly to the base devise 2 or 3, I/O requests will be also
issued to the alias device that are assigned in advance automatically.
The base device 4 cannot use any alias devices when I/O requests are issued by using Compatible PAV
because any alias devices are not assigned to the base device 4.
Compatible Hyper PAV Function
Compatible Hyper PAV was evolved for XP12K/10K static Compatible PAV and dynamic Compatible PAV.
If you use Compatible Hyper PAV, alias devices that were assigned to a base device are shared with all
base devices in the same LCU or CU image. Thereby, alias devices do not need to be shifted by dynamic
Compatible PAV. Moreover, you can use more devices for a base device than when you use Compatible
PAV because you can reduce devices that are assigned for an alias device as WLM is no longer used so
LPAR's can use the same aliases..
You can specify the type of PAV (Compatible PAV or Compatible Hyper PAV) to use for each host computer.
Therefore, an alias device may accept both I/O requests that are issued when you use the Compatible PAV
and Compatible Hyper PAV.
Compatible Hyper PAV is supported by version 50-09-5x or later.
Figure 2 Flow of I/O Requests Using Compatible Hyper PAV
In the above figure, the alias devices A, B and C are assigned to the base device 1, the alias devices D, E
and F are assigned to base device 2, and alias devices G, H and I are assigned to the base device 3
within a LCU or CU image. If you use Compatible Hyper PAV, all alias devices that were assigned in