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Chapter 1. Overview
The PCI-X Dual Channel Ultra320 SCSI RAID Adapter is a 133 MHz 64-bit PCI-X adapter. It allows you to
connect SCSI hard disk drives in RAID 0, 5 and 10 configurations to system units with a Peripheral
Component Interconnect (PCI) bus. RAID (Redundant Array of Independent Disks) provides a way to
distribute stored data among two or more hard disk drives inside or attached to a host system. This
adapter supports non-RAID disks formatted to 512 bytes/sector, RAID disks formatted to 522 bytes/sector,
and other devices including tape and optical devices.
Note: This guide refers to various hardware and software features and functions. The support for these
features and functions depends upon the limitations of your hardware and software. AIX and Linux
support all functions mentioned. If you are using another operating system, consult the appropriate
documentation for that operating system regarding support for the mentioned features and
functions. This guide also uses the terms channel and bus interchangeably.
The PCI-X Dual Channel Ultra320 SCSI RAID Adapter has two channels, 0 and 1. Each channel has both
an internal and an external connector. Only one internal or external connector can be used on each
channel.
Figure 1. PCI-X Dual Channel Ultra320 SCSI RAID Adapter
1
Channel 1 external, 68-position, VHDCI (very high density cable interconnect)
2
Channel 0 external, 68-position, VHDCI (very high density cable interconnect)
3
Channel 0 internal, 68-position, high-density plastic D-shell SCSI standard connector for 16-bit
attachment
4
Channel 1 internal, 68-position, high-density plastic D-shell SCSI standard connector for 16-bit
attachment
5
Adapter Handle
You can create, control, and manage a RAID configuration in combination with supporting host software.
For more RAID information, refer to the PCI-X SCSI RAID Controller Reference Guide for AIX, order
number SA23-1323, or PCI-X SCSI RAID Controller Reference Guide for Linux, order number SA23-1327.
The PCI-X Dual Channel Ultra320 SCSI RAID Adapter supports SCSI synchronous data rates from 20
MB/s (16-bit) up to 320 MB/s (16-bit) on two independent SCSI-2 channels.
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