Using Multiple Logical Libraries For Library Sharing; Using Multiple Control Paths; Using Multiple Control Paths For System I; Using Multiple Control Paths For Path Failover - IBM TS3100 Setup, Operator, And Service Manual

Library configuration is not limited to the examples given above. Many
configurations are possible, and can be designed according to your business needs.
For additional information, refer to your host application documentation.

Using Multiple Logical Libraries for Library Sharing

Multiple logical libraries are an effective way for the library to simultaneously back
up and restore data from heterogeneous applications. For example, the library can
be partitioned so that it processes:
v Commands from Application A (about Department X) in Logical Library 1
v Commands from Application B (about Department Y) in Logical Library 2
In this configuration, the storage slots and drives in each logical library are
dedicated to that library and are not shared among other libraries. Commands
issued by the applications travel to the library through two unique control paths.
Thus, the data processing for:
v Department X is confined to the storage slots and drives in Logical Library 1
v Department Y is confined to the storage slots and drives in Logical Library 2

Using Multiple Control Paths

In addition to creating multiple logical libraries, any logical library can be
configured to have more than one control path. When configuring additional
control paths, additional library sharing configurations and availability options are
made possible. Access to the logical library is on a first-come, first-served basis and
each control path for a logical library can accept commands while the library is in
use by another control path. By default, only the first drive in a logical library will
be LUN-1 enabled.
Note: Microsoft Windows 2000 and Microsoft Windows 2003 Removable Storage
For a particular logical library, you can enable as many control paths as there are
drives in that logical library.
Using Multiple Control Paths for System i, iSeries, and AS/400
Attachment
The use of control paths for the System i, iSeries, and AS/400 servers is unique. In
general, every iSeries adapter must recognize the control path that is associated
with the drives to which it is connected. For the iSeries and AS/400 servers, one to
six drives are supported by LVD and Fibre Channel adapters and the OS/400
OS/400 5.2, or i5/OS 5.3 operating system.

Using Multiple Control Paths for Path Failover

Command failures and timeouts are costly. You want your library to run smoothly
and efficiently. To ensure continued processing, the library offers an optional path
failover feature that enables the host device driver to resend the command to an
alternate control path for the same logical library. With control path failover
installed, the alternate control path can include another HBA, SAN, or library
control path drive. The device driver initiates error recovery and continues the
3-2
TS3100 Tape Library and TS3200 Tape Library Setup, Operator, and Service Guide
be added (see "Using Multiple Control Paths"). It is used by Backup Recovery
and Media Services (BRMS).
Manager (RSM) does not support multiple control paths within a logical
library. It is recommended that RSM be disabled to use this feature.
®
5.1,