VV Block Size. The virtual volume block size. This is the number of bytes written from a data stream to
an element of the striped volume before the stream switches to the next element of the st ripe.
PV Block Size. The size, in bytes, of the media data block.
Max Blocks Between Tape Marks. The maximum number of media blocks that will be written to thi s
tape before a tape mark is written. The product of this value and the Media Block Size de fines the
Physical Volume Section Length.
Stripe Width. The number of physical volumes in the stripe group that makes up the virtual volume. All
volumes in HPSS are considered to be striped, even if this value is one.
Aggregates. The number of tape aggregates on this volume.
Files in Aggregates. The number of files in the tape aggregates on this volume.
Bytes in Aggregates. The number of bytes stored in the tape aggregates on this volume.
Creation Time. The date and time the tape volume was created in the Core Server.
VV ID. The detailed description of the tape virtual volume ID associated with this tape virtual volume.
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Reference source not found for a description of the subfields of this field.
Current Writing Segment. The detailed description of the tape storage segment ID associated with the
segment that is found at the end of the tape volume. For various reasons, some tape volumes do not have
a value in this field. It will be displayed filled with blanks in that case.

Physical Volumes

This is a table of physical volume attributes for the physical volumes that make up this tape virtual
volume.
Vol Name. The ASCII name of the physical volume.
Type. The media type.
Dev ID. The ID of the device the physical volume is mounted on. If the volume is not mounted,
this field will be zero.
Mvr IP Addr. The IP address of the Mover that operates this physical volume. If the volume is
not mounted, this field will be zeros.
Mvr. The descriptive name of the Mover that operates this physical volume. If the volume is not
mounted, this field will be blank.
Mvr Host. The name of the host on which the Mover runs. If the volume is not mounted, this
field will be blank.
8.5.5. Changing Core Server Volume Condition
HPSS provides a single control that sets the operational condition of a disk or t ape virtual volume. The
control is found on the Core Server Tape Volume and Core Server Disk Volume windows and is called
the VV Condition.
HPSS Management Guide November 2009
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