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Chapter 1 - Getting Started
Disk I/O Card
The Disk I/O card is provided for drive channel expansion. By connecting daisy
chained NexStor 4000F enclosures to the Disk I/O cards additional enclosures
and drives can be added to your system. This card's design incorporates an active
hub, and provides automatic loop regeneration (LRC) and port bypass. The loop
regeneration function will "heal" the FC-AL (Fibre Channel-Arbitrated Loop)
when components become disconnected or faulty.
There are two Disk I/O cards installed at the rear of the enclosure adjacent to the
cooling fan bay. The upper Disk I/O card provides the connection to the "Loop
0" side of the disk drives, and the lower Disk I/O card provides the connection to
the "Loop 1" side of the disk drives.
Each Disk I/O card supports Small Form-Factor Pluggable (SFP) cages to accept
either optical or copper transceivers. They are designed to support NCITS T11
Fibre Channel compliant devices at speeds of 1.0625 Gb per sec or 2.125 Gb per
second. The speed is set through a hardware jumper (JP4) located on the Disk
I/O card. Setting the jumper on both pins will enable the 1 Gb/sec mode,
likewise offsetting the jumper will enable the 2 Gb/sec mode. An LED on the
card will illuminate to indicate the 2 Gb mode.
12
Disk I/O Card
FC-AL Loop Port "D1"
Loop Status LEDs
2 Gb/1 Gb Mode LED
FC-AL Loop Port "D2"
Install jumper JP4 on
both pins for 1Gb mode,
and on one pin only for
2 Gb mode.
Install jumpers JP1 and JP2
on both pins for each jumper.
Disk I/O Card
Install jumper JP3 on one
pin only for Single Bus mode.
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