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Tivoli Storage Manager devices may be real physical devices, such as disk drives or tape drives, or logical devices, such as files on a disk or storage on another server. See the following sections for details:
For a summary, see Table 5. For details about specific devices that are supported, visit the Tivoli Storage Manager Web site at this URL http://www.tivoli.com/support/storage_mgr/tivolimain.html.
Magnetic disk devices are the only random access devices. All disk devices share the same device type and predefined device class: DISK.
Tivoli Storage Manager drives include tape and optical drives that can stand alone or that can be part of an automated library. Supported removable media drives also include removable files devices such as Iomega Zip drives and Jaz drives.
Tivoli Storage Manager supports a variety of library types described in the following sections.
In a manual library, an operator mounts the volumes. You can combine drives with different device types, such as DLT and 8mm, in a single manual library.
When the server determines that a volume must be mounted on a drive in a manual library, the server issues mount request messages that prompt an operator to mount the volume. The server sends these messages to the server console and to administrative clients that were started by using the special mount mode or console mode parameter.
For help on configuring a manual library, see Chapter 5, Configuring Storage Devices. For information on how to monitor mount messages for a manual library, see Managing Server Requests.
A SCSI library, which is controlled through a SCSI interface, is a collection of drives of the same type. In a SCSI library, a robot or other mechanism automatically handles volume mounts and dismounts.
Some examples of this library type are:
For help on configuring a SCSI library, see Chapter 5, Configuring Storage Devices.
A 349X library is a collection of drives in an IBM 3494 or 3495 Tape Library Dataserver. Volume mounts and demounts are handled automatically by the library. A 349X library has one or more library management control points (LMCP) that the server uses to mount and dismount volumes in a drive. Each LMCP provides an independent interface to the robot mechanism in the library.
For help on configuring a 349X library, see Chapter 5, Configuring Storage Devices.
An external library is a collection of drives managed by an external media management system that is not part of Tivoli Storage Manager. The server provides an interface that allows external media management systems to operate with the server. The external media management system performs the following functions:
The external media manager selects the appropriate drive for media access operations. You do not define the drives, check in media, or label the volumes in an external library.
An external library allows flexibility in grouping drives into libraries and storage pools. The library may have one drive, a collection of drives, or even a part of an automated library.
An ACSLS library is a type of external library that is controlled by the StorageTek software, Automated Cartridge System Library Software (ACSLS). The server can act as a client application to the ACSLS software to use the drives.
For a definition of the interface that Tivoli Storage Manager provides to the external media management system, see Appendix A, External Media Management Interface Description.
Data movers are devices that accept requests from Tivoli Storage Manager to transfer data on behalf of the server. Data movers transfer data:
Tivoli Storage Manager supports two types of data movers:
You can create volumes on server disk space that have the characteristics of sequential access volumes such as tape. Tivoli Storage Manager supports these sequential volumes through the FILE device type. Because FILE is a sequential device type that is on disk, you do not define a library or drive object; only a device class.
FILE volumes can also be useful when transferring data for purposes such as electronic vaulting.
For more information about using, FILE volumes see Configuring FILE Sequential Volumes on Disk Devices.
You can create volumes that exist as archived files in the storage hierarchy of another Tivoli Storage Manager server. The volumes created are a special type of sequential access volume called a virtual volume. Virtual volumes have the characteristics of sequential access volumes such as tape. Tivoli Storage Manager supports virtual volumes through the SERVER device type. You must define a device class and a server that will store the data. No library or drive definition is required.
Virtual volumes are useful for the following purposes: