User manual ASUS SC896

[. . . ] Ultra2 PCI SCSI Card USER'S MANUAL User's Notice No part of this manual, including the products and software described in it, may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language in any form or by any means, except documentation kept by the purchaser for backup purposes, without the express written permission of ASUSTeK COMPUTER INC. ASUS PROVIDES THIS MANUAL "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OR CONDITIONS OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL ASUS, ITS DIRECTORS, OFFICERS, EMPLOYEES OR AGENTS BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES (INCLUDING DAMAGES FOR LOSS OF PROFITS, LOSS OF BUSINESS, LOSS OF USE OR DATA, INTERRUPTION OF BUSINESS AND THE LIKE), EVEN IF ASUS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES ARISING FROM ANY DEFECT OR ERROR IN THIS MANUAL OR PRODUCT. Product warranty or service will not be extended if: (1) the product is repaired, modified or altered, unless such repair, modification of alteration is authorized in writing by ASUS; or (2) the serial number of the product is defaced or missing. [. . . ] Installation 20 SCSI ID Record SCSI ID 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00 SCSI Device Channel A SCSI Device Channel B 2. 4 Setting Interrupts Normally, you do not change the default interrupt routing for the PCI-SC896, since performance is usually increased by having two separate interrupts. ASUS PCI-SC896 User's Manual 2. Configuring the Host Adapter This chapter discusses how to change configuration settings and includes these topics: · · · Section 3. 1, "When to Configure the PCI-SC896 Host Adapter" Section 3. 2, "Starting the SCSI BIOS Configuration Utility" Section 3. 3, "Exiting the SCSI BIOS Configuration Utility" 3. 1 When to Configure the PCI-SC896 In most cases you should not need to change the default configuration of your host adapter. You may decide to alter these default values if there is a conflict between device settings, or if you need to optimize system performance. The following tables list the configuration settings you can change. The global settings effect your host adapter and all SCSI devices which are connected to it. The device settings effect only individual SCSI devices. Global Default Settings Settings for the Host Adapter & All Devices SCAM Support Parity Checking Host Adapter SCSI ID Scan Order Default Settings Off Enabled 7 Low to High (0-Max) ASUS PCI-SC896 User's Manual 21 2. Configuring Device Default Settings Settings for Individual SCSI Devices Synchronous Transfer Rate (MB/Sec) Data Width Disconnect Read/Write I/O Time-Out (secs) Scan for Devices at Boot Time Scan for SCSI LUNs Queue Tags Default Settings 40 or 80 16 On 10 Yes Yes Enabled 3. 2 Starting the SCSI BIOS Utility If you have SCSI BIOS version 4. 0, and it includes the ASUS SCSI BIOS Configuration Utility, you can change the default configuration of your SCSI host adapters. You may decide to alter these default values if there is a conflict between device settings or if you need to optimize system performance. You can see the version number of your SCSI BIOS in a banner displayed on your computer monitor during boot. If the utility is available, the following message also appears on your monitor: Press Ctrl-C to start ASUS Configuration Utility. . . This message remains on your screen for about five seconds, giving you time to start the utility. If you decide to press "Ctrl-C, " the message changes to: Please wait, invoking ASUS Configuration Utility. . . After a brief pause, your computer monitor displays the Main Menu of the ASUS SCSI BIOS Configuration Utility. As NVRAM (Non Volatile Random Access Memory) is available on the PCI-SC896 SCSI device, changes can be made and stored using this menu driven utility. IMPORTANT: This utility is a powerful tool. If, while using it, you somehow disable all of your controllers, pressing Ctrl-A (or Ctrl-E on version 4. 04 or later) after memory initialization during reboot allows you to re-enable and reconfigure. 3. Configuring 22 ASUS PCI-SC896 User's Manual 3. Configuring Not all devices detected by the Configuration utility can be controlled by the BIOS. Devices such as tape drives and scanners require that a device driver specific to that peripheral be loaded. This device driver is provided by the devices manufacturer. 3. 2. 1 Configuration Utility Main Menu When you start the ASUS SCSI BIOS Configuration Utility, the Main Menu appears. This menu displays a list of up to four ASUS PCI to SCSI host adapters in your system and information about each of them. The PCI-SC896 host adapter appears on the menu as two PCI-SC896 entries; one for each channel. [. . . ] It references each SCSI signal to a common ground. This is the most common method (as opposed to differential SCSI which uses a separate ground for each signal). Synchronous Data Transfer - One of the ways data is transferred over the SCSI bus. Transfers are clocked with fixed-frequency pulses. [. . . ]