Adaptec 1742A User Manual Manual pdf 16 page image
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Adaptec 1742A User Manual

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Contents
  1. Table Of Contents
  2. Table Of Contents
  3. Table Of Contents
  4. Table Of Contents
  5. General Product Information
  6. Standard Mode
  7. EISA Configuration Utility
  8. Installation Software
  9. BIOS Operation Modes
  10. System Caching Description
  11. Product Specifications
  12. Associated Documentation
  13. Unpacking and Inspection
  14. Preparation
  15. SCSI Terminators
  16. SCSI Parity
  17. Physical Installation in the System
  18. Host Adapter Interface Mode
  19. Host Adapter BIOS
  20. Enhanced Mode
  21. Figure 5-1. Host Adapter Listing
  22. Figure 5-2. ADL Main Menu
  23. Figure 5-3. Download Firmware Screen
  24. Figure 5-4. Download Warning Message Screen
  25. Figure 5-5. Enhanced Mode Firmware Information
  26. Low-Level Format
  27. Exiting the ADL Program
  28. Figure 6-1. Standard BIOS Boot Message
  29. Enhanced Mode Operation
  30. Error if Device Not Found
  31. Determining Problems Using the LED
  32. Table 7-1. AHA 1740A/1742A/1744 LED Flash Codes
  33. Problems Booting the System from a SCSI Drive
  34. Problems Using Two SCSI Drives
  35. Extended Translation (Using DOS 5)
  36. When to Use Extended Translation
  37. Using Fdisk
  38. DOS/Windows
  39. Novell NetWare
Adaptec 1742A User Manual Manual pdf 16 page image
The AHA-1740A/1742A/1744 supports asynchronous, synchro-nous, and Fast SCSI data transfers on the SCSI bus. Asynchro-nous data transfers support up to 2 MBytes/sec, synchronoustransfers support up to 5 MBytes/sec, and Fast synchronous trans-fers support up to 10 MBytes/sec. Devices using different trans-fer rates can all be used on the same SCSI cable. TheAHA-1740A/1742A/1744 is both SCSI-1 and SCSI-2 compatible,and supports both SCSI-1 and SCSI-2 devices.The AHA-1740A/1742A/1744 fully supports the SCSI features ofdisconnect/reconnect, zero latency reads, and tagged queuing. Dis-connect/reconnect support maximizes SCSI bus utilization formultiple target systems. Zero latency reads and tagged queuingminimizes the mechanical limitations of SCSI fixed disk drives.The AHA-1740A/1742A/1744 has an on board BIOS that allows itto be used in addition to, or in place of, a standard fixed disk con-troller. Thus, up to two SCSI fixed disk drives can be used underDOS without the use of device drivers. Up to seven SCSI fixeddisk drives can be used without a driver if MS-DOS 5.0 or higheris used. Booting is also supported by the BIOS in the DOS envi-ronment.The AHA-1740A/1742A/1744 fully supports scatter/gather, a fea-ture utilized by device drivers to minimizes the number of I/Ocommands into memory. The UNIX ® /XENIX ® and NetWare ® op-erating environments take advantage of this feature.The AHA-1740A/1742A/1744 has two modes of operation: stand-ard mode and enhanced mode. The standard mode is softwarecompatible with the AHA-1540 series host adapter drivers. Theenhanced mode uses an advanced, high performance mailboxinterface and features full EISA 32-bit addressing. TheAHA-1740A/1742A/1744 in enhanced mode can support up to4 Gigabytes of host RAM memory, while standard mode is limitedto 16 MBytes of host RAM. The operation mode of theAHA-1740A/1742A/1744 is selected by running the EISA Configu-ration utility program provided with every EISA machine. Themodes of operation are fully described in Chapter 6, Host AdapterBIOS Operation.adaptec AHA-1740A/1742A/17441-2
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This manual is suitable for:
1742A1744AHA-1740AAHA-1742AAHA-1744
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