Administrative Tasks
601354 Rev A Normal Operations 4-35
Normal Operation
These user statistics are generally created and modified by
client applications. However, the SA or SO can also create and
change any user statistic. The primary use of user statistics is
for the Mount Media command’s mount by criteria option.
This option allows media to be selected for mounting based on
logical expressions that define a range of acceptable statistics
values.
Implicit in this capability is the need for a client or SA to
establish a policy to maintain a consistent set of criteria. After a
statistic is defined, it should be consistently applied to each
medium. It is the responsibility of each client or SA to establish
such a policy and to update them during operations.
A total of eight user statistics can be specified for each medium.
Four are character-based statistics and four are integer-based.
The Modify Media command is available over the GUI and
API only. Modify media parameters are the media identifier,
field index, and value. The field index entry specifies the target
statistic to create or replace. The value entry is then associated
with this field index number.
Define a Media
Type
When the default media types supported by VolServ software
are not sufficient, a new media type may be defined and
registered with VolServ.
The Define Media Type command is used along with manual
archives. Refer to “Define a Media Type” on page 3-18 for
more information.