San Backup; Host Attachment - Quantum scalar i2000 User Manual

SAN Backup

Host Attachment

Scalar i2000 User's Guide
Data path conditioning occurs in two separately managed areas:
• Between host and Fibre Channel (FC) I/O blades
• Between FC I/O blades and library drives
The Host Registration Service (HRS), an optional utility that runs on the
host, manages data path conditioning along the path between the host
and the FC I/O blade. HRS automatically sends pulses to the I/O blade at
regular, configurable intervals. The I/O blade monitors the data path for
the anticipated pulses and generates a reliability, availability, and
serviceability (RAS) ticket if two intervals pass without receiving a pulse
from the host. This indicates a host connection failure.
The FC I/O blade manages data path conditioning along the path
between itself and the library drives. Data path monitoring automatically
occurs at regular, configurable intervals. The I/O blade generates a RAS
ticket if monitoring tests fail for two intervals. This indicates either loss of
connectivity or drive failure. The FC I/O blades include the data path
conditioning feature. Administrators can use the LMC to configure data
path conditioning.
Storage area network (SAN) support is built into the library. Fibre
Channel throughput results in huge amounts of data being stored
3
quickly. For more information about running your library as part of a
SAN environment, see the ADIC Management Console User's Guide.
Requests issued from the host application result in cartridge movement
3 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 FC or SCSI command interface to
obtain status information, configuration information, and cartridge
storage information from the library.
Hosts can be attached to the library in the following ways:
• SDLT-320 SCSI-interfaced drives can be connected to the SAN when
they are directly connected to an external Storage Networking
Controller (SNC) 5100. There is no area provided to mount the SNC
inside the library modules, so you must plan for extra rack space near
the library.
Chapter 3 Description
Library Features
81