On Fri, Mar 10, 2023 at 02:08 PM, S. L. Garwood wrote:
Arrrrggghhh - the nightmares are starting again LOL !!!
My night wares is soon as i think of OS complexity vs VM. For example, add devices to VM, change one file, assemble, rebuild the nucleus, install it, and IPL. Five steps, you're done in ten minutes. I *still* don't know how to "just add a device" on any version of OS.
When the system I was on switched from R21 MVT to SVS, there were endless
meetings about moving from the drum TSO swap devices to TSO page devices using
said drums (and someone wanted PLPA there too).
I keep thinking under Hercules, virtual storage systems (VM, SVS, MVS, maybe even OS/MVT w/TSO) should have 2305 paging devices. Obviously, 16M systems won't page much, and the emulated 2305 units won't be faster than any other OTHER device (all using the same disk for backing store), but shops loved those devices in the real world.
