User`s manual

Chapter 1: Introduction

1-19

1-8 AIC-7895 MultiChannel

Single-Chip Ultra SCSI

The SUPER P6DGS has an onboard SCSI controller that is 100% compatible

with all major operating and hardware platforms. PCI 2.1 and SCAM Level 1

compliance are assured. Two independent SCSI channels provide a per channel

data transfer rate of 40 MB/s. Connectors include two 68-pin, 16-bit Ultra Wide

SCSI connectors (JA1/JA2) and a 50-pin, 8-bit SCSI connector (JA3). You can

connect up to 15 devices (seven 8-bit internal and eight 16-bit internal or external

SCSI devices, or 15 Wide internal and external SCSI devices).

When Fast SCSI devices are connected, the total length of all cables (internal

and external) must not exceed 3 meters (9.8 ft) to ensure reliable operation. If

no Fast SCSI devices are connected, the total length of all cables must not

exceed 6 meters (19.7 ft).

The AIC-7895 consolidates the functions of two SCSI chips, eliminating the need

for a PCI bridge. Reducing PCI bus loading enables system capabilities to be

expanded with additional PCI devices.

The AIC-7895 functions with Adaptec RAIDport II (ARO-1130SA/1130CA) to de-

liver RAID functionality.

1-9 AIC-7890 Ultra2 SCSI Controller

Note: If you are using a low voltage differential Hard Drive, it is recommended you use LVD/

SE Ultra2 SCSI cable. LVD/SE cable offers increased length, and can accommodate more

devices.

The SUPER P6DGU/P6SGU has an onboard SCSI controller that is 100% com-

patible with all major operating and hardware platforms. The AIC-7890 controller

provides advanced PCI-to-SCSI Ultra2 SCSI host adapter features in a 272-pin

Ball Grid Array (BGA) package, as well as containing an integrated dual mode

(LVD/SE) transceiver. The AIC-7890 Ultra2 SCSI chip connects to a 32-bit PCI

bus. It is PCI 2.1 compliant, fully supports the power management requirements

specified in Microsoft's PC 97 guidelines, and provides SCAM level 2 support.

The AIC-7890 functions with Adaptec RAIDport III (ARO-1130U2) to deliver

RAID functionality.

The AIC-7890 Ultra2 SCSI controller, used together with the AIC-3860 trans-

ceiver, allows Ultra2 and single-ended devices to operate together on the same

SCSI bus without inpacting Ultra2 performance and cable lengths. The AIC-7890