Native Fibre Connections; Scsi Connections; Drive Types And Lun-1 Compatibility; Host Adapter - ADIC SCALAR 24 Installation And Operation Manual

Native Fibre Connections

A library supporting native fibre attachments communicates with a host through an intermediary LUN-1
(Logical Unit Number) interface in one or more installed drives. In this type of connection, a host is
connected directly to a drive rather than a library. Communication is accomplished as a host sends
commands to and receives status or responses from one or more LUN-1 enabled drives.
LTO-2 and LTO-3 drive modules support native fibre connections. Each drive has a single LC fibre
connector located in back of the module for attachments.

SCSI Connections

A SCSI drive module can be connected to a Low Voltage Differential (LVD) SCSI bus. Both ends of the bus
must be terminated.
The Scalar 24 can also be connected to a Storage Area Network (SAN) by means of an optional Storage
Networking Controller (SNC). The SNC converts either Fibre Channel protocol or Gigabit Ethernet (GbE)
protocol to parallel SCSI protocol.

Drive Types and LUN-1 Compatibility

LTO-1 drive modules are compatible with libraries that support parallel SCSI attachments. Such libraries
can be upgraded to support the LUN-1 environment.
LTO-2 and LTO-3 drive modules are only compatible with libraries operating with the LUN-1 environment.
Configurations consisting of a mix of LTO drive modules are compatible with libraries that have been
upgraded to support a LUN-1 environment.

Host Adapter

Your Scalar 24 library can be connected to directly to a host by means of the appropriate host bus adapter
card. The host adapter you choose depends on your system requirements and needs. If you are not sure
about your host adapter requirements, please call ADIC's Technical Assistance Center (ATAC) and ask for
assistance. Before you connect the Scalar 24 library, the interface must be installed along with the required
drivers. For information about drivers refer to Preparing the Host Computer on page 19.

Terminator

If the Scalar 24 is the last device on a SCSI chain, a terminator is required. The terminator attaches to the
SCSI connector on the drive module. Be sure to use an LVD terminator that is SPI-3 compliant. For
information on installing the terminator, refer to Connecting to a SCSI Drive on page 14.

Application Software

A variety of backup and data storage software is available for use with your Scalar 24. The software you
use depends upon your storage needs and the system you are using. Please check with ADIC Sales or
Customer Assistance if you have a question on the compatibility of a particular software package.
Be sure that any versions of third-party software installed on your library are current and compatible with
your library. Please check with your third-party vendor if you have a question regarding the compatibility of
a particular software package, drive, or patch.
Scalar 24 Installation and Operation Guide 11