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

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                  |
|8MMSP2       Sequential       2  8MM    DRIVE       44.4 DRIVES                 |
+--------------------------------------------------------------------------------+

Task

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:                                                 |
|                     Directory:                                                 |
|                   Server Name:                                                 |
|                  Retry Period:                                                 |
|                                                                                |
|                Retry Interval:                                                 |
|                        Shared:                                                 |
|Last Update by (administrator): ADMIN                                           |
|         Last Update Date/Time: 05/31/2000 13:15:36                             |
+--------------------------------------------------------------------------------+

Device Class Name

The name of the device class.

Device Access Strategy

How data is written to the device class.

Storage Pool Count

The number of storage pools that are assigned to the device class.

Device Type

The device type of the device class.

Format

The recording format.

Est/Max Capacity (MB)

The estimated or maximum capacity of a volume associated with the device class.

Mount Limit

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

Mount Wait (min)

The maximum number of minutes to wait for a sequential access volume to be mounted.

Mount Retention (min)

The number of minutes to retain an idle sequential access volume before dismounting it.

Label Prefix

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

Library

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

Directory

The directory for a shared FILE device class.

Server Name

The name of a defined server.

Retry Period

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

Retry Interval

How often the retries are done within a given retry period.

Two-Sided

Whether a removable file is two-sided.

Shared

Whether this FILE devclass will be shared between the server and one or more storage agents.

Last Update by (administrator)

The administrator that made the last update to the device class.

Last Update Date/Time

The date and time of the last update.

Related Commands

Table 175. Commands Related to QUERY DEVCLASS