User Manual
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... and uneven loading of SCSI devices. SCSI Channel A can control up to seven internal and external SCSI devices, while SCSI Channel B can control up to form two SCSI busses using its TwinChannel architecture (SCSI Channel A and SCSI Channel B). To reduce these effects, the SCSI bus must be used to...SCSI devices only. • The number of host adapters installed in your suite of the line drivers. C (Page 2-4) Print Spec Number: 491709-00 Rev C Current Date: 9/1/93 ECN Date: 9/14/93 Each chain of up to your system is discussed in detail later in this chapter.) 2-4 Adaptec AHA...
... and uneven loading of SCSI devices. SCSI Channel A can control up to seven internal and external SCSI devices, while SCSI Channel B can control up to form two SCSI busses using its TwinChannel architecture (SCSI Channel A and SCSI Channel B). To reduce these effects, the SCSI bus must be used to...SCSI devices only. • The number of host adapters installed in your suite of the line drivers. C (Page 2-4) Print Spec Number: 491709-00 Rev C Current Date: 9/1/93 ECN Date: 9/14/93 Each chain of up to your system is discussed in detail later in this chapter.) 2-4 Adaptec AHA...
User Manual
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To toggle values for drives not controlled by the BIOS. All removable media drives ...Disk .......Boot Device Only ( ) Extended Translation for use of a removable drive as a fixed disk. All Devices - Software drivers are available: Boot Device Only - The following choices are needed for each option, press the Enter key. Disabled - C...BIOS only. ( ) Support Removable Disks as Fixed Disk This option allows you to move between options. Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. Configuring the Host Adapter BIOS Configuration BIOS ...
To toggle values for drives not controlled by the BIOS. All removable media drives ...Disk .......Boot Device Only ( ) Extended Translation for use of a removable drive as a fixed disk. All Devices - Software drivers are available: Boot Device Only - The following choices are needed for each option, press the Enter key. Disabled - C...BIOS only. ( ) Support Removable Disks as Fixed Disk This option allows you to move between options. Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. Configuring the Host Adapter BIOS Configuration BIOS ...
User Manual
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... The Fast SCSI synchronous data transfer rates are 10.0, 8.0, 6.67, and 5.7 MBytes/sec. Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. When set to control the SCSI device. If the drive is set to control; If removability is desired while the system is turned on , the removable media device should not be installed with device drivers...
... The Fast SCSI synchronous data transfer rates are 10.0, 8.0, 6.67, and 5.7 MBytes/sec. Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. When set to control the SCSI device. If the drive is set to control; If removability is desired while the system is turned on , the removable media device should not be installed with device drivers...
User Manual
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...level output voltage 0.0 to 5.25 volts DC (signal negation) A-4 Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. Output Signals All signals use open collector or three-state drivers. AHA-2740 Series User's Manual Extended Industry-Standard Architecture Interface Table A-1. Standard... VIH 2.0 volts minimum 0.4 volts maximum 5.25 volts maximum SCSI Interface Electrical Interface These are the specifications listed in ANSI X3.131-1986 for single-ended operation. Each signal driven by a SCSI device has the following output characteristics when measured at 48 mA...
...level output voltage 0.0 to 5.25 volts DC (signal negation) A-4 Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. Output Signals All signals use open collector or three-state drivers. AHA-2740 Series User's Manual Extended Industry-Standard Architecture Interface Table A-1. Standard... VIH 2.0 volts minimum 0.4 volts maximum 5.25 volts maximum SCSI Interface Electrical Interface These are the specifications listed in ANSI X3.131-1986 for single-ended operation. Each signal driven by a SCSI device has the following output characteristics when measured at 48 mA...
User Manual
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... closest to the stub, if any, within the device). Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. Specifications Input Signals SCSI inputs meet the following electrical characteristics on each signal, including both receivers and passive drivers: Table A-3. Internal SCSI Connector The internal SCSI connector must be an unshrouded 50-pin header, compatible with...
... closest to the stub, if any, within the device). Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. Specifications Input Signals SCSI inputs meet the following electrical characteristics on each signal, including both receivers and passive drivers: Table A-3. Internal SCSI Connector The internal SCSI connector must be an unshrouded 50-pin header, compatible with...
User Manual
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Output and Input Signals Driver Output Signals VOL 0 volts minimum 0.5 volts maximum VOH Open collector 5.25 volts maximum IOL 60 mA IOH 0.1 mA Receiver Input Signals VT- 1.0 volts maximum VT+ 1.4 ... Date: 9/1/93 ECN Date: 9/14/93 Schmitt Trigger with 0.8-volt hysteresis. Connector The floppy disk interface connector should be an unshrouded 34-pin header. Ì A-8 Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. AHA-2740 Series User's Manual Floppy Disk Interface Standard Electronic and Physical Interface Table A-6.
Output and Input Signals Driver Output Signals VOL 0 volts minimum 0.5 volts maximum VOH Open collector 5.25 volts maximum IOL 60 mA IOH 0.1 mA Receiver Input Signals VT- 1.0 volts maximum VT+ 1.4 ... Date: 9/1/93 ECN Date: 9/14/93 Schmitt Trigger with 0.8-volt hysteresis. Connector The floppy disk interface connector should be an unshrouded 34-pin header. Ì A-8 Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. AHA-2740 Series User's Manual Floppy Disk Interface Standard Electronic and Physical Interface Table A-6.
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C (Page B-1) Print Spec Number: 491709-00 Rev C Current Date: 9/1/93 ECN Date: 9/14/93 B-1 B I/O Operating Environment About This Appendix Read this appendix to find out: • If embedded support for your host adapter is available with your operating system • Whether or not you need additional software for your host adapter in the DOS/Windows environment • Information on Adaptec's EZ-SCSI I/O Operating Environment Software that makes driver installation easier than ever before Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev.
C (Page B-1) Print Spec Number: 491709-00 Rev C Current Date: 9/1/93 ECN Date: 9/14/93 B-1 B I/O Operating Environment About This Appendix Read this appendix to find out: • If embedded support for your host adapter is available with your operating system • Whether or not you need additional software for your host adapter in the DOS/Windows environment • Information on Adaptec's EZ-SCSI I/O Operating Environment Software that makes driver installation easier than ever before Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev.
User Manual
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...system, host adapter drivers for the AHA-2740 Series may not need to install additional environment software in order to use your operating system vendor for information on the current schedule for example: SCSI tape drives, scanners, plotters, or worm drives B-3 Adaptec AHA-2740 Series User's... Manual Stock Number: 510381-00 / Rev. Note Until embedded support is provided for ordering Adaptec software listed in the Adaptec Technical Support section found in their...
...system, host adapter drivers for the AHA-2740 Series may not need to install additional environment software in order to use your operating system vendor for information on the current schedule for example: SCSI tape drives, scanners, plotters, or worm drives B-3 Adaptec AHA-2740 Series User's... Manual Stock Number: 510381-00 / Rev. Note Until embedded support is provided for ordering Adaptec software listed in the Adaptec Technical Support section found in their...
User Manual
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Refer to the Adaptec EZ-SCSI User's Manual for those devices. Adaptec EZ-SCSI also includes an ASPI device driver called aspicd that configures your operating environment automatically. Adaptec EZ-SCSI is designed to interface directly with the device. Adaptec EZ-SCSI has a number of CD-ROM drives and the aspidisk device driver, which are running Adaptec EZ-SCSI. Ì B-4 Adaptec AHA-2740 Series User...
Refer to the Adaptec EZ-SCSI User's Manual for those devices. Adaptec EZ-SCSI also includes an ASPI device driver called aspicd that configures your operating environment automatically. Adaptec EZ-SCSI is designed to interface directly with the device. Adaptec EZ-SCSI has a number of CD-ROM drives and the aspidisk device driver, which are running Adaptec EZ-SCSI. Ì B-4 Adaptec AHA-2740 Series User...
User Manual
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...Chapter 3. The following tips will still switch to disable synchronous negotiation. C Performance Tips Ther AHA-2740 Series is disabled on the SCSI bus (for example, CD-ROM drives) are all controlled by device drivers and do not support synchronous negotiation and may malfunction if they receive a request for it..., you may want to synchronous mode if it allows data to yes) by as much as 60 seconds. Adaptec AHA-...
...Chapter 3. The following tips will still switch to disable synchronous negotiation. C Performance Tips Ther AHA-2740 Series is disabled on the SCSI bus (for example, CD-ROM drives) are all controlled by device drivers and do not support synchronous negotiation and may malfunction if they receive a request for it..., you may want to synchronous mode if it allows data to yes) by as much as 60 seconds. Adaptec AHA-...
User Manual
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...ECN Date: 9/14/93 C-5 The drivers that are installed will give DOS users the best performance possible under DOS, but Windows. Ì Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. DOS/Windows Performance Adaptec's EZ-SCSI I/O Operating Environment Software is designed not... only to simplify installation of device drivers under not only DOS, but also includes ...
...ECN Date: 9/14/93 C-5 The drivers that are installed will give DOS users the best performance possible under DOS, but Windows. Ì Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. DOS/Windows Performance Adaptec's EZ-SCSI I/O Operating Environment Software is designed not... only to simplify installation of device drivers under not only DOS, but also includes ...
User Manual
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... 1 Gigabyte Questions and Answers About Extended Translation What happens if I enable extended translation with SCSI drives that are less than two fixed disk drives on the host adapter? To protect your... itself as capable of extended translation. What if I use standard translation regardless of software drivers when extended translation is enabled. If you need to seven fixed disk drives under the...translation provided they are running DOS 5.0. Drives handled by the BIOS will lock out any driver that is not compatible with less than 1 GByte of formatted capacity will use older ...
... 1 Gigabyte Questions and Answers About Extended Translation What happens if I enable extended translation with SCSI drives that are less than two fixed disk drives on the host adapter? To protect your... itself as capable of extended translation. What if I use standard translation regardless of software drivers when extended translation is enabled. If you need to seven fixed disk drives under the...translation provided they are running DOS 5.0. Drives handled by the BIOS will lock out any driver that is not compatible with less than 1 GByte of formatted capacity will use older ...
User Manual
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... Interface See ASPI. AT Bus See ISA. ASPI Advanced SCSI Programming Interface. ASPI enables host adapters and device drivers to -Fast SCSI host adapter. Glossary-3 Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. Adaptec EZ-SCSI copies the required software programs to the PC's fixed disk ...system-such as fixed disks and CD-ROM drives on a PC. The rate is usually slow. Glossary A Adaptec EZ-SCSI A user-friendly software program that automatically installs SCSI devices such as DOS, OS/2 or UNIX-and a specific family of the data transfer must occur before the...
... Interface See ASPI. AT Bus See ISA. ASPI Advanced SCSI Programming Interface. ASPI enables host adapters and device drivers to -Fast SCSI host adapter. Glossary-3 Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. Adaptec EZ-SCSI copies the required software programs to the PC's fixed disk ...system-such as fixed disks and CD-ROM drives on a PC. The rate is usually slow. Glossary A Adaptec EZ-SCSI A user-friendly software program that automatically installs SCSI devices such as DOS, OS/2 or UNIX-and a specific family of the data transfer must occur before the...
User Manual
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...by the host software. The Common Command Set (CCS) is the basis for the SCSI-2 command set for communication with fixed disk drives. Glossary-5 Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. Differential A term referring... to the electrical characteristics of the signals used on a PC's fixed disk and are stored on the SCSI bus interface. The mechanism may require setup by the host adapter. D Device Driver A software program that allows hardware control...
...by the host software. The Common Command Set (CCS) is the basis for the SCSI-2 command set for communication with fixed disk drives. Glossary-5 Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. Differential A term referring... to the electrical characteristics of the signals used on a PC's fixed disk and are stored on the SCSI bus interface. The mechanism may require setup by the host adapter. D Device Driver A software program that allows hardware control...
User Manual
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... read but not written. SCSI provides a standard interface that have more SCSI peripheral devices and a host adapter, connected by cables in emulation mode to transfer control information to and from the board. Glossary-10 Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. ROM Read-Only Memory. S Scatter/Gather A device driver feature that allows the...
... read but not written. SCSI provides a standard interface that have more SCSI peripheral devices and a host adapter, connected by cables in emulation mode to transfer control information to and from the board. Glossary-10 Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. ROM Read-Only Memory. S Scatter/Gather A device driver feature that allows the...
User Manual
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Index D Daisy-chain 2-15 Data FIFO threshold 1-7, 3-7 Data transfer 1-3, 1-4, 3-17 Default settings 1-7 Device driver software 3-17 Disconnect/reconnect 3-15, C-4 Disk device booting from 4-4 formatting B-4 removable B-3 DOS B-3, C-5 copy command 3-4... 491709-00 Rev C Current Date: 9/1/93 ECN Date: 9/14/93 Index-3 D-5 EZ-SCSI See Adaptec EZ-SCSI F Fdisk command D-4 Features 1-4 FIFO 1-7, 3-7 Floppy disk drive 2-15, 2-20, A-8 connector 1-7, 2-7, 2-8 controller 1-4, 1-7, 2-7 disabling the drive 1-8, 2-20 Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev.
Index D Daisy-chain 2-15 Data FIFO threshold 1-7, 3-7 Data transfer 1-3, 1-4, 3-17 Default settings 1-7 Device driver software 3-17 Disconnect/reconnect 3-15, C-4 Disk device booting from 4-4 formatting B-4 removable B-3 DOS B-3, C-5 copy command 3-4... 491709-00 Rev C Current Date: 9/1/93 ECN Date: 9/14/93 Index-3 D-5 EZ-SCSI See Adaptec EZ-SCSI F Fdisk command D-4 Features 1-4 FIFO 1-7, 3-7 Floppy disk drive 2-15, 2-20, A-8 connector 1-7, 2-7, 2-8 controller 1-4, 1-7, 2-7 disabling the drive 1-8, 2-20 Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev.