HP OpenVMS Systems

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Problem updating from V4.7 to V5.3

The Question is:

Update from 4.7 to 5.3 is not stable. After about a day ,
the disk structure is courrupted. We are using an area in
the QBUS address range beginning at 256K, length 64K as
private memory.

The Answer is:

   Disable the use of the Q-bus memory and see if the system operation
   stabilizes.

   If the Q-bus memory is not (correctly) coordinated through the Q-bus
   allocation routines documented in the device driver manual, all manner
   of odd corruptions are possible.