We have a z800 with a z/VM LPAR and three z/OS LPARs. The z/VM LPAR
supports two Linux guests used to host test and production TSM
servers. We have to relocate some mainframe peripherals to accomodate
installation of new non-mainframe equipment. Specifically, we have
to relocate a 2074 console controller and a rack containing a
number of Optica ESCON to parallel channel converters. The z/VM
system does not use any of the I/O devices connected through
Optica converters, but the channel paths involved are visible to
the z/VM LPAR.

My co-workers want to take down all the LPARs during the equipment
move. They argue that we don't know how z/VM will respond to
interrupts resulting from I/O devices being removed and replaced.
Scheduling downtime is difficult, since the TSM servers are busy
running backups at night, while the z/OS applications are heavily
used during the day.
Has anyone done a similar equipment move with z/VM up and running?

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