I would like to be able to do some volume snapshots for a disaster recovery exercise.
Since we don't have VM, what I'd like to do is go down to single user mode, software applications stopped and issue a device copy for all active devices, and then come back up with the devices I just copied to, mounted at /mnt. This will let me change the internal configuration files to that of the hardware devices for the disaster recovery system, or in my case for testing my DR testing plan, another LPAR, and IPL the copies What is the best method to do this? I know I could disk copy the volumes using DFSMShsm with linux down, but I'd rather not come all the way down. I've got the dasd to spare for this, so I'd like to try it. So best way to shutdown to single user mode, kick off a script, and what commands to dump the dasd in that script, and return to runlevel 3 is the what I'm after
