easyRAID ERQ16-U4R3, User Manual

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easyRAID Q16
Serial ATA Disk Array Systems
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Host Interface
The disk array system has either dual SCSI interfaces or dual fibre channel interfaces. Refer to
the following sections to understand host interface system requirements.
Small Computer Systems Interface
The ERQ16-U4R3 has dual Ultra320 SCSI interfaces that are compatible with previous SCSI
standards. Refer to the following table to understand SCSI bus requirements.
Fibre Channel Interface
The ERQ16-F2R3 has dual 2 Gbit fibre channel interfaces with SFP connectors for linkage to a
fibre channel switch or host computer interface card. With the correct SFP transceiver and optical
cable, the following transmission distances can be achieved.
Hard Disks
Supply the number of SATA disks needed for your application. Refer to “Understanding RAID”
on page 3 to determine the number of disks needed.
Note
Subtract the internal cable length (30 cm) from the maximum SCSI bus
length to calculate the maximum external SCSI cable length.
SCSI
Standard
Maximum
SCSI Bus Length
in Meters
Data Rate
in Megabytes
per Second
Maximum
Number of Devices
Ultra320 12 320 15
Ultra160 12 160 15
Ultra2 12 80 15
Ultra Wide 1.5 40 7
Fast Wide 3 20 15
Ultra 1.5 20 7
Component Optical
SFP Transceiver LC Optical
Cable Short Wave Long Wave
Maximum Cable Length 50m 10 Km