Virtual TapeServer 6.04.01 Installation Guide

26 | Cabling and Connecting VTS
The Device Mapper Multipath Enablement Kit (dm-multipath and devicemapper RPMs) is
installed by default on the VTS server. You must download the latest version of the
multipath.conf file, which is available here:
http://h20000.www2.hp.com/bizsupport/TechSupport/
SoftwareIndex.jsp?lang=en&cc=us&prodNameId=3559652&prodTypeId=12169&prodSeriesI
d=3559651&swLang=13&taskId=135&swEnvOID=4004
Then, download the latest version of the Device Mapper Multipath Enablement Kit for HP
StorageWorks Disk Arrays Release Notes document from this URL:
http://h20000.www2.hp.com/bizsupport/TechSupport/
DocumentIndex.jsp?lang=en&cc=us&prodClassId=-
1&contentType=SupportManual&prodTypeId=18964&prodSeriesId=3559651
This document describes how to install and configure the device mapper tools. The following
sections are relevant for the VTS environment:
• Installing Device Mapper Multipath tools
• Configuring Device Mapper Multipath to enable HP arrays
• Setting up Device Mapper Multipath daemon
Cabling to external tape resources
The VTS server module is available with 4-16 usable I/O ports. Depending on the VTS model
and the NonStop server type, these can be SCSI, Fibre Channel, or a combination. These I/O
ports can be used for a combination of host or peripheral ports (or both) up to the limits of VTS
licensing.
The SCSI ports supported by VTS are Ultra160-LVD SCSI, with very high density connector
interface (VHDCI) connectors. High-voltage differential (HVD) SCSI is supported through the
SCSI converter. Connectors are labeled by bus number. Devices connected to different buses
can have the same SCSI ID.
The Fibre Channel ports on VTS support 4Gb Fibre Channel using LC-type connectors.
Connectors are labeled by port number. Devices connected to different ports can have the
same port ID.
Note Make a note of device IDs and the bus or port numbers to which they are connected.
You need this information to set up VTS.
Fibre Channel
Fibre Channel tape drives can be connected directly to the dual-channel fiber controller
included in some VTS models using a male LC type connector. The connector used on the
opposite end of the cable depends on the Fibre Channel tape drive used.