MPE/iX Intrinsics Reference Manual (32650-90905)

Chapter 8 467
Command Definitions (HPMERGEEND-LOGSTATUS)
HPVOLINFO
overhead in sectors. Item 23 returns this overhead as a 64-bit real.
MPE V virtual memory overhead is the volume space that is allocated for
saving segments of main memory temporarily. This amount of configured
virtual memory space is equivalent to the amount of used virtual memory
space. Virtual memory on MPE V is allocated only on system volumes.
There is no virtual memory on private volumes.
When the specifier is 1 or 4, the virtual memory overhead consists of the
virtual memory on the volume whose LDEV or volume name was specified.
When the specifier is 2, the only valid specifier is
MPEXL_SYSTEM_VOLUME_SET.
This is because virtual memory is allocated only on system volumes.
Specifier 3 is invalid. This is because virtual memory is valid only on the
MPE V system volume set, and because the concept of volume classes does
not hold for MPE V system volumes.
24 & 25 Directory space overhead
Returns the directory space overhead.
Item 24 returns a 64-bit signed integer containing the directory space
overhead in sectors. Item 25 returns this overhead as a 64-bit real.
These are subsets of items 16 and 17.
Directory space is area on system and nonsystem volumes reserved for
accounting information. It consists of the directory space used for
permanent files.
When the specifier is 1 or 4, the directory space overhead consists of the
directory space on the volume whose LDEV or volume name was specified.
When the specifier is 2 or 3, the directory space overhead on the volumes
that make up the volume set or class is returned.
On MPE V, the system directory is allocated on LDEV 1, and for private
volumes, the directory is allocated on the master volume of the volume set
or class. Specifying a volume set or class gives the same results as
specifying the master volume of the set or class.
26 & 27 MPE/iX file label overhead
Returns the MPE/iX file label overhead. This item is valid only on MPE/iX.
Item 26 returns a 64-bit signed integer containing the file label overhead
in sectors. Item 27 returns this overhead as a 64-bit real.
These are subsets of items 16 and 17.
On MPE/iX, each volume has its own label table, which contains file labels
and extent descriptors for files that begin on that volume.
When the specifier is 1 or 4, the file label overhead consists of the overhead
on the volume whose LDEV or volume name was specified.
When the specifier is 2 or 3, the file label overhead on the volumes that