W dniu 11.07.2024 o 21:02, Jeremy Nicoll pisze:
[...]
I recall that the first stages of our disaster recovery tests required someone
to put cartridges into 3480 drives in a machine room. We tested the whole
process (once we'd ironed out technical errors in the docs) using secretarial
staff, who knew nothing about the machines. We thought it possible that if
- say - there'd been a fire, /we/ might not be allowed into the room, but
perhaps someone like a fireman might be allowed in & needed instructions
that "anyone" could understand.
It was my rule for DR drill.
The youngest (in terms of employment) IT operator was responsible to
read the procedure and perform IPL.
To be exact, he was responsible for:
- find the procedure in DR data center. Hardcopy. In some binder. In
some cabinet.
- start it reading
- identify HMC and properc console. HMC was located in another room than
consoles. Several consoles, but all of them had stickers with proper ID.
- logon to HMC (yes, user and password was in the procedure)
- perform POR
- perform LOAD (IPL)
- continue IPL process on MVS console, including start all of the
subsystems, etc.
Usually such guy was stressed, especially because there were some "VIP"
guys behind him.
However actually his role was to ...read the text. He wasn't examined.
We examined the procedures.
Every mistake or "I don't know what to do now" were important to me -
just to fix and improve the procedure.
And we repeated it. As many times as we needed.
And we checked it after every major system change (z/OS upgrade, new
DASD, new CPC, etc.)
Finally our DR drill discussions started from the following:
"OK, first we start mainframe system, it works, there is nothing to
discuss. Let's look..."
And it really worked that way. Our official DR test came down to 15-30
minutes of watching IPL (still performed by operator), eating pizza
delivered by the management and teasing our non-mainframe colleagues and
their problems. :-)
--
Radoslaw Skorupka
Lodz, Poland
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