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Tivoli Storage Manager stores data on magnetic disks in two ways:
Task | Required Privilege Class |
---|---|
Configuring Random Access Volumes on Disk Devices | System |
Tivoli Storage Manager provides a defined DISK device class that is used with all disk devices.
Do the following to use random access volumes on a disk device:
For example, enter the following command on the command line of an administrative client:
define stgpool engback1 disk maxsize=5m highmig=85 lowmig=40
This command defines storage pool ENGBACK1.
See Example: Defining Storage Pools for details.
define volume engback1 /usr/tivoli/tsm/server/bin/stgvol.002 formatsize=21
If you do not specify a full path name, the command uses the current path. See Defining Storage Pool Volumes for details.
This one-step process replaces the former two-step process of first formatting a volume (using DSMFMT) and then defining the volume. If you choose to use the two-step process, the DSMFMT utility is available from the operating system command line. See Administrator's Reference for details.
Another option for preparing a volume is to create a raw logical volume by using SMIT.
Another way to use magnetic disk storage is to use files as volumes that store data sequentially (as on tape volumes). You can use FILE sequential volumes to transfer data for purposes such as electronic vaulting. For example, you can send the results of an export operation or a database backup operation to another location. At the receiving site, the files can be placed on tape or disk. You can define a device class with a device type of FILE.
To use files as volumes that store data sequentially, do the following:
For example, enter the following command on the command line of an administrative client:
define devclass fileclass devtype=file mountlimit=2
This command defines device class FILECLASS with a device type of FILE.
See Defining and Updating FILE Device Classes.
To store database backups or exports on FILE volumes, this step is all you need to do to prepare the volumes. For more information, see Defining Device Classes for Backups and Planning for Sequential Media Used to Export Data.
For example, enter the following command on the command line of an administrative client:
define stgpool engback2 fileclass maxscratch=100 mountlimit=2
This command defines storage pool ENGBACK2 with device class FILECLASS.
See Defining or Updating Primary Storage Pools for details.
To allow Tivoli Storage Manager to use scratch volumes for this device class, specify a value greater than zero for the number of maximum scratch volumes when you define the device class. If you do set MAXSCRATCH=0 to not allow scratch volumes, you must define each volume to be used in this device class. See Preparing Volumes for Sequential Access Storage Pools for details.