Administrator's Reference

QUERY DEVCLASS (Display Information on One or More Device Classes)

Use this command to display information on one or more device classes.

Privilege Class

Any administrator can issue this command.

Syntax

                     .-*-----------------.
>>-Query DEVclass----+-------------------+---------------------->
                     '-device_class_name-'
 
      .-Format--=--Standard-----.
>-----+-------------------------+------------------------------><
      '-Format--=--+-Standard-+-'
                   '-Detailed-'
 

Parameters

device_class_name
Specifies the name of the device class to be queried. This parameter is optional. You can use wildcard characters to specify this name. All matching device classes are displayed. If you do not specify a value for this parameter, all device classes are displayed.

Format
Specifies how the information is displayed. This parameter is optional. The default value is STANDARD. Possible values are:

Standard
Specifies that partial information is displayed for the specified device class.

Detailed
Specifies that complete information is displayed for the specified device class.

Examples

Task 1

Display information on all device classes.

Command:
query devclass

Output:

+--------------------------------------------------------------------------------+
|Device     Device     Storage  Device Format  Est/Max  Mount                    |
|Class      Access        Pool  Type           Capacity Limit                    |
|Name       Strategy     Count                     (MB)                          |
|                                                                                |
|---------  ---------- -------  ------ ------  -------- -----                    |
|8MMTAPE    Sequential       1  8MM    DRIVE    6,144.0     2                    |
|DISK       Random           4                                                   |
|PLAINFILES Sequential       1  FILE               50.0     1                    |
|PLAINFILES Sequential       2  8MM    DRIVE       44.4 DRIVES                   |
|                                                                                |
+--------------------------------------------------------------------------------+

See Task 2 for parameter definitions.

Task 2

Display information in full detail on the PLAINFILES device class.

Command:
query devclass plainfiles format=detailed

Output:

+--------------------------------------------------------------------------------+
|             Device Class Name: PLAINFILES                                      |
|        Device Access Strategy: Sequential                                      |
|            Storage Pool Count: 1                                               |
|                   Device Type: FILE                                            |
|                        Format:                                                 |
|         Est/Max Capacity (MB): 50.0                                            |
|                   Mount Limit: 1                                               |
|              Mount Wait (min):                                                 |
|         Mount Retention (min):                                                 |
|                  Label Prefix:                                                 |
|                       Library:                                                 |
|                   Server Name:                                                 |
|                  Retry Period:                                                 |
|                Retry Interval:                                                 |
|Last Update by (administrator): ADMIN                                           |
|         Last Update Date/Time: 05/31/1996 13:15:36                             |
+--------------------------------------------------------------------------------+

Device Class Name
Specifies the name of the device class.

Device Access Strategy
Specifies how data is written to the device class.

Storage Pool Count
Specifies the number of storage pools that are assigned to the device class.

Device Type
Specifies the device type of the device class.

Format
Specifies the recording format.

Est/Max Capacity (MB)
Specifies the estimated or maximum capacity of a volume associated with the device class.

Mount Limit
Specifies the maximum number of sequential access volumes that can be mounted concurrently or specifies that DRIVES is the mount limit.

Mount Wait (min)
Specifies the maximum number of minutes to wait for a sequential access volume to be mounted.

Mount Retention (min)
Specifies the number of minutes to retain an idle sequential access volume before dismounting it.

Label Prefix
Specifies the high-level qualifier of the data set name that the server writes into the sequential access media labels.

Library
Specifies the name of the defined library object that contains the drives used by the device class.

Server Name
Specifies the name of a defined server.

Retry Period
Specifies the interval over which the server should attempt to contact a target server if there is a suspected communications failure.

Retry Interval
Specifies how often the retries are done within a given retry period.

Last Update by (administrator)
Specifies the administrator that made the last update to the device class.

Last Update Date/Time
Specifies the date and time of the last update.

Related Commands

Table 163. Commands Related to QUERY DEVCLASS

Command Description
DEFINE DEVCLASS Defines a device class.
DEFINE SERVER Defines a server for server-to-server communications.
DELETE DEVCLASS Deletes a device class name.
QUERY SERVER Displays information about servers.
UPDATE DEVCLASS Changes the attributes of a device class.


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