IBM Tivoli Storage Manager, Version 7.1

UPDATE DEVCLASS (Update a REMOVABLEFILE device class)

Use the REMOVABLEFILE device class for removable media devices that are attached as local, removable file systems.

Privilege class

To issue this command, you must have system privilege or unrestricted storage privilege.

Syntax


>>-UPDate DEVclass--device_class_name--------------------------->

>--+--------------------------+--+----------------------+------->
   '-LIBRary--=--library_name-'  '-MAXCAPacity--=--size-'   

>--+----------------------------+--+-----------------------+---->
   '-MOUNTRetention--=--minutes-'  '-MOUNTWait--=--minutes-'   

>--+---------------------------+-------------------------------><
   '-MOUNTLimit--=--+-DRIVES-+-'   
                    +-number-+     
                    '-0------'

Parameters

device_class_name (Required)

Specifies the name of the device class to be updated.

LIBRary

Specifies the name of the defined library object that contains the removable media drives used by this device class. This parameter is optional.

MAXCAPacity

Specifies the maximum size of any volumes that are defined to a storage pool categorized by this device class. This parameter is optional.

AIX operating systems HP-UX operating systems Sun Solaris operating systems Windows operating systems Because the server opens only one file per physical removable medium, specify a capacity that enables one file to make full use of your media capacity.

You must specify this value as an integer followed by K (kilobytes), M (megabytes), G (gigabytes), or T (terabytes).

For example, MAXCAPACITY=5M specifies that the maximum capacity for a volume in this device class is 5 MB. The smallest value that is allowed is 1 MB (that is, MAXCAPACITY=1M).

MOUNTRetention

Specifies the number of minutes to retain an idle sequential access volume before dismounting it. This parameter is optional. You can specify a number from 0 to 9999.

This parameter can improve response time for sequential access media mounts by leaving previously mounted volumes online.

MOUNTWait

Specifies the maximum number of minutes the server waits for an operator to respond to a request to either mount a volume in a drive in a manual library or check in a volume to be mounted in an automated library. This parameter is optional. If the mount request is not satisfied within the specified amount of time, the mount request is canceled. You can specify a number from 0 to 9999.

MOUNTLimit

Specifies the maximum number of sequential access volumes that can be simultaneously mounted for the device class. This parameter is optional. You can specify a number 0 - 4096.

If you plan to use the simultaneous-write function, ensure that sufficient drives are available for the write operation. If the number of drives needed for a simultaneous-write operation is greater than the value of the MOUNTLIMIT parameter for a device class, the transaction fails.

The following are possible values:

DRIVES: Specifies that every time a mount point is allocated, the number of drives that are defined to the library is used to calculate the true MOUNTLIMIT value (including online status).
Note: For EXTERNAL library types, do not specify DRIVES for the MOUNTLIMIT value. Specify the number of drives for the library as the MOUNTLIMIT value.
number: Specifies the maximum number of drives that are used concurrently in this device class by the server. This value must never exceed the number of drives that are defined and online in the library that services this device class.
0 (zero): Specifies that no new transactions can gain access to the storage pool. Any current transactions continue and complete but new transactions are terminated.

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