User's Guide

Scalar DLC 2-19
September 2007
Scalar DLC
The Scalar 10K, through its Scalar Distributed Library Control
(Scalar DLC) interface, provides the industry’s most advanced
combination of management and diagnostics. It creates and
maintains the Scalar 10K configuration, the physical location
of the cartridge accessor, and the inventory of cartridges. The
database is kept in flash memory of the Library control
hardware.
The Scalar DLC attaches to the library SCSI bus. The host
continues to directly attach to the drives via a SCSI or an SNC
Interface.
Refer to the Scalar DLC documentation for a detailed
description of the interfaces supported.
Scalar DLC is available as a single server or as dual servers
(redundant servers) to provide failover.
In COD and Customer-Specific configurations, Scalar DLC is
optional with the single server being the typical Scalar DLC
option. See
Single Server.
In a Dual Aisle configuration, Scalar DLC is required with the
redundant servers being the typical Scalar DLC option. Refer
to
Redundant Servers on page 2-20.
Single Server
The Scalar DLC Integrated Controller for the Scalar 10K Dual
Aisle library consists of Scalar DLC 2.5 or later software
loaded on a rack mountable server. The server has dual SCSI
drives connected to an embedded RAID controller, a LVD
SCSI card for library connection, and redundant AC power
supplies. The system also ships with a rack mountable flat
panel LCD monitor/keyboard/mouse.
See Figure 2-10 on page 2-20.