In the TMON lab we always ran new ESP releases of z/OS under z/VM just
so we could have read only access to our existing DASD in the Sysplex
before toleration service was available to actually bring the guests
into the Sysplex. This worked well you just have to have some volumes
exclusive under z/VM read/write for work data sets on the guest. It
allowed us to easily import or reference data sets from our normal
systems.
This is perfectly safe since z/VM will enforce read only access if that
is the way a disk is attached you are not violating any sharing rules.
If you have problems it will be in the guest reading something dirty
without serialization but that was acceptable for our test systems.
Best Regards,
Sam Knutson, GEICO
Performance and Availability Management
mailto:[EMAIL PROTECTED]
(office) 301.986.3574
"Think big, act bold, start simple, grow fast..."
-----Original Message-----
>Oh, I'm not too sure how well z/OS will tolerate a "read only" disk. I
>remember doing it long ago with MVS 3.8j and VM/370. I'd get some
>strange I/O errors at times.
<>
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