Chapter 2: Installation
17
The VTrak has four 68-pin, VHDCI SCSI connectors and two separate SCSI
channels. These connectors are used in one of five ways:
•
One VTrak, one Host/RAID PC, one SCSI card
•
One VTrak, one Host/RAID PC, two SCSI cards
•
One VTrak, two Host/RAID PCs, one SCSI card in each
•
Two (ore more) VTraks, one Host/RAID PC, one SCSI card (daisy chain)
•
Two VTraks, one Host/RAID PC, two SCSI cards
VTrak makes use of SCSI Target IDs (TIDs) and Logical Unit Numbers (LUNs) to
enable multiple VTrak arrays managed by a single Host/RAID PC. How to set
TIDs and LUNs is explained in Chapter 3. At this point, proceed with the
connection of SCSI cables following industry standard guidelines and the
illustrations on the following pages.
SCSI Terminator
When the VTrak is the last SCSI device in the chain you must install the Promise-
supplied (or equivalent) external SCSI terminator on both SCSI Connectors (see
below). The SCSI cable or terminator can attach to either SCSI connector. If you
use a SCSI channel, you must attach a SCSI Terminator to it.
Figure 9. If you use a SCSI channel, attach a terminator to it.
Caution
Proper termination and SCSI-3 compliant cables are required for
the system to operate correctly. Two external SCSI terminators
and a SCSI-3 compliant cables are included with the VTrak 15100.
VTrak Controller
SCSI
Terminator
Attach SCSI cable
or Terminator to
either connector
Channel 1 Channel 2
SCSI
Terminator
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