Did you ever want to save your z/VSE test system ?
Ingolf24 120000DRN3 Visits (2059)
Just last week I had to modify my z/VSE 5.2 test system to verify a SNA network setup. However, I wanted to keep my VSE/POWER PNET TCP/IP environment. My test systems are running as z/VM guests.
There are multiple options to achieve that, e.g. to backup the existing system to tape or disk (e.g. via DDR). I tried a faster way and used Flashcopy. ... and it turned out that was really fast. I did not use minidisk caching. The "backup" just took seconds.
This only works for ECKD devices and the Flashcopy feature need to be installed. See also my b
My system (DOSRS, SYSWK1) and data devices were on fullpack minidisks (dedicated disks would be OK too). I asked our system administrator to define a disk of the same size and type for each z/VSE disk (target devices). Then I IPLed my z/VSE system, added the new disks to the IPL procedure with the DVCDN (device down) parameter. You may modify the IPL procedure yourself or use the hardware configuration dialog (selection 2 -> 4 -> 1). In the dialog define the ECKD device, select it for further processing and select DVCDN. The resulting IPL ADD statement could look like this: ADD 1297:1298 AS 00B:00C,ECKD,DVCDN. Then I re-IPLed my system, shutdown all subsystems (VTAM, TCP/IP, CICS, ...) and applications to avoid I/O activity and did a Flashcopy with the following Attention Routine command: ixfp snap,008:00b and answered "YES", when prompted. I used ixfp status,00b to verify, if the Flashcopy is completed. Completion messages will show up on the console too. I did the Flashcopy for all z/VSE devices.
After the Flashcopies were completed I verified that I could startup the z/VSE system on the new devices: I detached the source devices, renamed the device addresses and IPLed the z/VSE system from the target device. If you want to IPL the target disks, they have to have the same device addresses as the source disks.
Everything was fine. Now I worked on my SNA setup.
For later IPL of your test system be sure, that you always select the right set of disks.
More information on Flashcopy is in our z/VSE Administration book, that you can download from our documentation page.