HP StoreEver ESL G3 Tape Libraries - Manual (Page 14)

automatically transfer commands to the new path if the original path is lost. This transfer is invisible
to most applications, avoiding the need for user intervention.
IMPORTANT: Basic failover requires LTO-5 tape drives or later. Advanced failover requires LTO-6
drives or later, a supported host driver, and library firmware version 665H or later.
Serviceability and reliability
The library has extensive serviceability and reliability features. You can hot swap drives, power
supplies (in redundant power configurations only), fans, and many of the boards within the library.
Your backup system and data path are idle most of the time. When backups begin, the system is
used intensively at maximum bandwidth. The library provides you with notifications and a robust
event system that notifies you of any problems it identifies, enabling you to solve them before
backups begin. For more information about the library notification system, event system, and other
troubleshooting help, see
“Troubleshooting your library” (page 186) .
Host attachment
Requests issued from the host application result in cartridge movement in the library. The primary
requests issued are for mounting and dismounting cartridges in and out of the tape drives and for
importing and exporting cartridges in and out of the library. The library manages the physical
location. In addition to requesting cartridge movement in the library, the host application can use
the Fibre Channel (FC) command interface to obtain status information, configuration information,
and cartridge storage information from the library.
Tape drives are directly attached to host systems or to the SAN. The library robot control path is
presented through one or more tape drive ports, depending on Partitioning and Failover
configuration.
Remote management
The library can be managed locally or remotely using the LMC. Locally, the LMC appears on the
OCP on the front of the library. Remotely, the LMC is accessed through a client instance of the
LMC software on any computer on the network. For more information about access, see
“Logging
on from the Library Management Console (LMC) using a web browser” (page 77) . For more
information about the LMC, see “Accessing the Library Management Console (LMC)” (page 80) .
The LMC provides additional monitoring of a SAN-attached library over the network to a
management server by using Simple Network Management Protocol (SNMP). This includes library
subsystem health and status information and early fault notification.
The library also supports the Common Information Model (CIM) server based on the Storage
Management Initiative Specification (SMI-S) on the MCB. A CIM client can use the CIM server to
monitor the SAN-attached library.
Capacity on demand
ESL G3 tape libraries can be purchased at starting points of 100, 300, 700, 1500, 3000, or
5000 cartridge slots enabled. Adding physical EMs/HDEMs does not automatically enable new
slots. Instead, slots are flexibly enabled for use in groups of approximately 100 through capacity
upgrade licenses.
Control module
All library configurations include the control module, which contains the following minimum
components (see
Figure 2 (page 15) ):
•
Library management module (LMM)
•
I/E station
14 Library overview