Cisco Nexus 5000 Series Switch Fabric Manager Software Configuration Guide, NX-OS 4.0 (OL-16598-01, June 2008)

CHAPTER
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21-1
Nexus 5000 Series Switch Fabric Manager Software Configuration Guide
OL-16598-01
21
Discovering SCSI Targets
This chapter describes the SCSI LUN discovery feature provided in switches in the Nexus 5000 Series.
It includes the following sections:
• Information About SCSI LUN Discovery, page 21-1
• Displaying SCSI LUN Information, page 21-3
Information About SCSI LUN Discovery
Small Computer System Interface (SCSI) targets include disks, tapes, and other storage devices. These
targets do not register logical unit numbers (LUNs) with the name server.
The name server requires LUN information for the following reasons:
• To display LUN storage device information so that a Network Management System (NMS) can
access this information.
• To report device capacity, serial number, and device ID information.
• To register the initiator and target features with the name server.
The SCSI LUN discovery feature uses the local domain controller Fibre Channel address. It uses the
local domain controller as the source FC ID, and performs SCSI INQUIRY, REPORT LUNS, and READ
CAPACITY commands on SCSI devices.
The SCSI LUN discovery feature is initiated on demand, through CLI or SNMP. This information is also
synchronized with neighboring switches, if those switches belong to the Nexus 5000 Series.
This section includes the following topics:
• About Starting SCSI LUN Discovery, page 21-1
• Starting SCSI LUN Discovery, page 21-2
• About Initiating Customized Discovery, page 21-2
• Initiating Customized Discovery, page 21-2
About Starting SCSI LUN Discovery
SCSI LUN discovery is done on demand.
Only Nx ports that are present in the name server database and that are registered as FC4 Type =
SCSI_FCP are discovered.