HP 9000 V-Class Operator's Manual page 95

Recovering from failures
Abnormal system shutdowns
It is important to have sufficient space to capture the part of memory
that contains the instruction or data that caused the crash. You can
define more than one dump device so that if the first one fills up, the next
one continues dumping until the dump is complete or no more defined
space is available. To ensure enough dump space, define a dump area
that is at least as big as your computer's physical memory plus 1 Mbyte.
Setting the amount of memory dumped and the classes of the memory
pages determines the size of the dump. The content can be configured
while the system is running and changed without rebooting the system.
The larger the size of the system's physical memory, the longer it takes to
dump it to disk (and the more disk space it consumes).
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