LSI Integrated SCSI LSI 896 32-bit 2Ch. Ultra2 SCSI LSI 1010-33 32-bit 2Ch. Ultra160 SCSI LSI 1010-66 64-bit 2Ch.
Contents General Description ..................................................................... 3 SCSI Interface ......................................................................... 3 The SCSI Interface ................................................................. 4 Wide Ultra2 SCSI .................................................................... 4 Connecting Your SCSI Peripherals ......................................... 5 SCSI Bus Termination ...............................................
1. Introduction 1. Introduction General Description The onboard LSI integrated Dual Channel Ultra2 SCSI provides two SCSI-3, Ultra2 SCSI interfaces that require BIOS support. The dual channel LSI integrated SCSI provides 16-bit Low Voltage Differential (LVD) and Single-Ended (SE) SCSI solutions for your computer. This supports legacy Fast SCSI devices, Ultra SCSI devices, Ultra2 SCSI devices, and the newest Ultra160 SCSI devices.
1. Introduction 1. Introduction The SCSI Interface The SCSI functionality for the LSI integrated SCSI is contained within the LSI integrated PCI-SCSI I/O Processor chip. The LSI integrated SCSI connects directly to the two SCSI buses for SE or LVD SCSI applications and generates timing and protocol in compliance with the SCSI standard.
1. Introduction 1. Introduction Connecting Your SCSI Peripherals All internal SCSI bus connections to the LSI integrated SCSI integrated SCSI are made with an unshielded, 68-conductor ribbon cable. One side of this cable is marked with a color to indicate the pin-1 side. The connectors on this cable are keyed to ensure proper pin-1 connection. Use Ultra/Ultra2 rated cables for these bus speeds.
2. Starting External SCSI Connections If only external SCSI device connections have been made, then terminate the last external device on the SCSI bus. You must disable the termination on all other devices. Termination on your integrated SCSI is automatically enabled in this case. Internal and External SCSI Connections 2. Starting If internal and external SCSI devices are connected, then terminate the last internal and external devices on the SCSI bus.
2. Starting Setting Interrupts Normally, you do not change the default interrupt routing for the LSI integrated SCSI, since performance is usually increased by having two separate interrupts. 2. Starting Configuring the LSI Integrated SCSI In most cases you should not need to change the default configuration of your integrated SCSI. You may decide to alter these default values if there is a conflict between device settings, or if you need to optimize system performance.
3. Configuring The SCSI BIOS Utility If you have SCSI BIOS version 4.0, and it includes the 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.
3. Configuring Below the list of host adapters on the Main Menu display, you see eight options. They are described in detail below. If these settings are altered, the system reboots upon exit from the configuration utility using the Quit option. Change Adapter Status The change adapter status allows you to activate or deactivate a integrated SCSI and all SCSI devices attached to it.
3. Configuring Language If enabled, the Language option allows you to select from five languages for the configuration utility: English, German, French, Italian, and Spanish. Call for support if you have any additional questions. Help The Help option allows you to bring up a help screen with information about the Main Menu. Quit The Quit option allows you to exit from the SCSI BIOS Configuration utility when on the Main Menu. Esc 3.
3. Configuring NOTE: When disabling parity checking, it is also necessary to disable disconnects for all devices, as parity checking for the reselection phase is not disabled. If a device does not generate parity, and it disconnects, the I/O never completes because the reselection never completes. Host SCSI ID – In general, it is suggested that you do not change your integrated SCSI ID from the default value of 7, as this gives it the highest priority on the SCSI bus. 3.
3. Configuring NOTE: Neither of these options will have any affect after the disk has been partitioned with the FDISK command. To remove partitioning, two options are available: • Reformat the disk using the Format Device option. See the section “Device Selections Menu” below. • Use the FDISK /MBR command at the C:\ prompt, where MBR represents master boot record. IMPORTANT: Reformatting the disk or using FDISK /MBR erases all partitioning and data that exists.
3. Configuring Read/Write I/O Time-out (seconds) – This option sets the amount of time the integrated SCSI waits for a read, write, or seek command to complete before trying the I/O transfer again. Since this provides a safeguard allowing the system to recover if an I/O operation fails, it is recommended that you always set the time-out to a value greater than zero. NOTE: If the time-out is set to zero, then the I/O will never time-out.
3. Configuring Exiting the SCSI BIOS Utility Since some changes only take effect after your system reboots, it is important that you exit this configuration utility properly. Return to the Main Menu and exit by using the Quit option. IMPORTANT: If you reboot the system without properly exiting the utility, some changes may not take effect. 3.
3. Configuring Glossary of Terms and Abbreviations Address - A specific location in memory, designated either numerically or by a symbolic name. Asynchronous Data Transfer - A method of transmission which does not require a common clock, but separates fields of data by stop and start bits. It is slower than synchronous data transfer. BIOS - Basic Input/Output System. Software that provides basic read/write capability. Usually kept as firmware (ROM based).
4. Appendix DMA Bus Master - A feature that allows a peripheral to control the flow of data to and from system memory by blocks, as opposed to PIO (Programmed I/O) where the processor is in control and the flow is by byte. Device Driver - A program that allows a microprocessor (through the operating system) to direct the operation of a peripheral device. Differential - A hardware configuration for connecting SCSI devices.
4. Appendix IRQ - Interrupt Request Channel. A path through which a device can get the immediate attention of the computer’s CPU. The PCI bus assigns an IRQ path for each SCSI integrated SCSI. ISA - Industry Standard Architecture. A type of computer bus used in most PC’s. It allows devices to send and receive data up to 16-bits at a time. Kbyte - Kilobyte. A measure of computer storage equal to 1024 bytes. Local Bus - A way to connect peripherals directly to computer memory.
4. Appendix Parity Checking - A way to verify the accuracy of data transmitted over the SCSI bus. One bit in the transfer is used to make the sum of all the 1 bits either odd or even (for odd or even parity). If the sum is not correct, an error message appears. PCI - Peripheral Component Interconnect. A local bus specification that allows connection of peripherals directly to computer memory. It bypasses the slower ISA and EISA busses.
4. Appendix SCSI-2 - The current SCSI specification which adds features the original SCSI1 standard. SCSI-3 - The next SCSI specification, which adds features to the SCSI-2 standard. Although this version is still in development, parts of the SCSI-3 standard are already in use. SCSI Bus - A integrated SCSI and one or more SCSI peripherals connected by cables in a linear chain configuration. The integrated SCSI may exist anywhere on the chain, allowing connection of both internal and external SCSI devices.
4. Appendix Ultra SCSI - A standard for SCSI data transfers. It allows a transfer rate of up to 20 Mbytes/s over an 8-bit SCSI bus and up to 40 Mbytes/s over a 16-bit SCSI bus. STA (SCSI Trade Association) supports using the term “Ultra SCSI” over the term “Fast-20”. Ultra2 SCSI - A standard for SCSI data transfers. It allows a transfer rate of up to 40 Mbytes/s over an 8-bit SCSI bus, and up to 80 Mbytes/s over a 16-bit SCSI bus.
