Adaptec 1520A - AHA Storage Controller Fast SCSI 10 MBps User Manual Download

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AHA-1510A/20A Series User’s Guide
Stock Number: 510400-00, Rev. C

Page: Front Cover

Print Spec Number: 491842-00
Current Date: 12/7/94

ECN Date: 11/29/94

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User’s Guide

AHA-1510A/1520A Series

ISA-to-SCSI Host Adapter

Summary of Contents for 1520A - AHA Storage Controller Fast SCSI 10 MBps

Page 1: ...94 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA A A A A A A A A A A A A A A AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA A A A A A A A A A A A A A A A User s Guide User s Guide AHA 1510A 1520A Series ISA to SCSI Host Adapter ...

Page 2: ...A AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA A A A A A A A A A A A A A A A Adaptec Inc 691 South Milpitas Boulevard Milpitas CA 95035 Copyright 1994 Adaptec Inc All rights reserved Adaptec and the Adaptec logo are trademarks of Adaptec Inc which may be registered in some jurisdictions Printed in Singap...

Page 3: ... 94 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA A A A A A A A A A A A A A A AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA A A A A A A A A A A A A A A A R AHA 1510A 1520A Series ISA to SCSI Host Adapter User s Guide ...

Page 4: ...uct design without reservation and without notification to its users Adaptec Technical Support and Services If you have questions about installing or using the host adapter check this user s guide first you will find answers to most of your questions here If you need further assistance please contact us We offer the following support and information services For technical support answers to techni...

Page 5: ...ion which can be determined by turning the equipment off and on the user is encouraged to try to correct the inter ference by one or more of the following measures Reorient or relocate the receiving antenna Move the equipment away from the receiver Plug the equipment into an outlet on a circuit different from that to which the receiver is powered If necessary the user should consult the dealer or ...

Page 6: ...ent Date 11 18 94 ECN Date 11 29 94 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA A A A A A A A A A A A A A A AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA A A A A A A A A A A A A A A A ...

Page 7: ... Manual xi Conventions xii Advisories xiii 1 Introduction General Product Information 1 1 Features 1 2 Fast Data Transfer 1 2 Superior Price Performance Value 1 2 Multitasking 1 2 Connectivity 1 2 Compatibility 1 2 Software Support 1 3 Product Specifications 1 4 Physical Dimensions 1 4 Power Requirements 1 4 Environmental Requirements 1 4 2 Host Adapter Configuration Jumper Block Locations 2 2 Def...

Page 8: ...11 ISA BIOS Address 2 11 Floppy Disk Controller 2 12 Optional Host Adapter Settings 2 12 Data Transfer Mode 2 12 SCSI Floptical Support 2 13 Fast SCSI 2 13 Extended BIOS Translation for DOS Drives 1 GByte 2 13 3 Hardware Installation Host Adapter Layout 3 1 Terminating the SCSI Bus 3 2 Terminating SCSI Devices 3 2 Terminating the Host Adapter 3 2 Termination for Internal Devices Only 3 3 Terminati...

Page 9: ...AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA A A A A A A A A A A A A A A A 4 Software Support DOS Windows 4 1 Adaptec EZ SCSI 4 1 Other Operating Systems 4 2 5 Troubleshooting Operating Problems 5 1 Other Error Messages 5 5 A Support for Large Disk Drives Extended Translation Using MS DOS 5 0 A 1 When to Enable Extended Translation A 1 Using Fdisk A 2 Extended Translation Questions and Answers A 2...

Page 10: ...rent Date 11 18 94 ECN Date 11 29 94 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA A A A A A A A A A A A A A A AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA A A A A A A A A A A A A A A A ...

Page 11: ...2A Jumper Blocks 2 2 2 2 AHA 1510A Jumper Block 2 2 3 1 Host Adapter Terminators 3 2 3 2 Connecting Internal Devices Only 3 3 3 3 Connecting External Devices Only 3 4 3 4 Connecting Internal and External Devices 3 4 3 5 Inserting the Host Adapter in a Slot 3 6 3 6 Internal SCSI Ribbon Cable to Host Adapter 3 8 3 7 Internal SCSI Ribbon Cable to Internal SCSI Device 3 9 3 8 Daisy Chaining External S...

Page 12: ...nt Date 11 18 94 ECN Date 11 29 94 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA A A A A A A A A A A A A A A AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA A A A A A A A A A A A A A A A ...

Page 13: ...tively as the AHA 1510A 20A Series Chapter 1 Introduction has general information about product features benefits and specifications Chapter 2 Host Adapter Configuration describes the host adapter factory defaults optional features and how to change host adapter settings Chapter 3 Hardware Installation describes how to install the host adapter in your computer Chapter 4 Software Support describes ...

Page 14: ...ns The following typographic conventions are used in this manual bold Used for keystrokes press the Enter key Helvetica Used for operator entry that must be typed exactly as shown device c aspi2dos sys and for mes sages on the screen Enter Password Helvetica Italics Used as a place holder for text you must determine and type in enter nn for number Also used for program and file names that appear i...

Page 15: ...e kinds of advisories Note Text set off in this way presents remind ers tips or suggestions that may make it eas ier for you to install configure and use your host adapter Caution Failure to observe this kind of advi sory could result in loss of data or damage to your system and installed devices WARNING Failure to observe this kind of advisory could result in personal injury Use caution when hand...

Page 16: ...ent Date 11 18 94 ECN Date 11 29 94 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA A A A A A A A A A A A A A A AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA A A A A A A A A A A A A A A A ...

Page 17: ... performance of ISA bus and EISA bus microcomputers with the much faster SCSI data transfer rates AHA 1510A 20A Series host adapters provide superior data I O performance at an affordable price AHA 1510A 20A Series host adapters excel in single user environ ments i e stand alone computers or network nodes by utilizing the CPU s untapped power to improve system I O performance AHA 1510A 20A Series ...

Page 18: ...ior Price Performance Value High speed PIO data transfer Optional high speed DMA data transfer supported under OS 2 on EISA bus computers Minimal SCSI overhead in single tasking environments when utilizing disconnect reconnect capabilities 16 bit host bus data transfer widths Multitasking Each host adapter supports up to eight simultaneous I O tasks when utilizing SCSI 2 Disconnect Reconnect featu...

Page 19: ...ty of computer systems and SCSI devices Full support of SCSI 1 and SCSI 2 Floppy controller option support for all standard floppy disk drives AHA 1522A only Optional built in SCSI Floppy Floptical diskette drive support Compact design half card size fits easily into desktop PCs as well as many slots in laptop computers Software Support Adaptec EZ SCSI software automatically configures your sys te...

Page 20: ...A A A A A A A A A A A A A A A AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA A A A A A A A A A A A A A A A Product Specifications Physical Dimensions Length 6 875 Width 4 18 Thickness 0 5 Power Requirements 5 25 V to 4 75 V tolerance on the ISA power supply Environmental Requirements Temperature ...

Page 21: ...to operate as shipped in most ISA bus and EISA bus computer systems This chapter explains the default and optional settings for the AHA 1510A 20A Series host adapter You will learn when to change the default settings and how to do so Some AHA 1510A 20A Series configuration parameters such as SCSI ID and termination are pre set at the factory These default set tings are listed on page 2 3 Most of t...

Page 22: ...apters have four jumper blocks labeled J5 J6 J8 and J9 These labels are printed on the board next to the jumper blocks AHA 1522A host adapters have an additional jumper block J7 to enable or disable the floppy controller Figure 2 1 shows the location of these jumper blocks The AHA 1510A host adapter has only one jumper block J9 which is described on page 2 8 Figure 2 2 shows its location Figure 2 ...

Page 23: ...ult Settings AHA 1510A 20A Series host adapters have the default setting shown in the following table These settings are appropriate for most computer systems If you want to change any of these settings see the descriptions of each setting in the following sections Host Adapter Settings Default Value SCSI Disconnection Enabled SCSI ID 7 SCSI Parity Enabled Terminators Installed Synchronous Negotia...

Page 24: ... not supported under DOS or Windows It is supported under OS 2 on EISA bus computers BT Enable disable boot from host adapter BIOS Boot from host adapter BIOS jumper Do not boot from host adapter no jumper M0 No jumper M1 Enable disable Fast SCSI Fast SCSI on jumper Fast SCSI off no jumper SN Enable disable synchronous negotiation Synchronous negotiation on jumper Synchronous negotiation off no ju...

Page 25: ...A A A A A Jumper Block J6 Pin Pair Description SD Set host adapter SCSI ID IC Set host adapter IRQ host adapter You must also set pin pairs on jumper block J9 DC Set host adapter DMA only if DMA enabled on J5 You must also set pin pairs on jumper block J8 SP Enable disable parity checking Parity enabled no jumper Parity disabled jumper Default setting SD SD SD IC IC DC DC SP Extra Jumper Default S...

Page 26: ...A A A A A A A Jumper Block J7 The host adapter floppy controller is enabled when the jumper is installed on jumper block J7 Caution If the host adapter floppy controller is enabled you must disconnect all other floppy con trollers to avoid system hang Jumper Block J8 This jumper block is used only when DMA is enabled on jumper block J5 pin pair DT DMA Channel Set J8 Pin Pairs Set DMA channel Chann...

Page 27: ...520A 1522A Pin Pair Description I2 I1 I0 I9 Set host adapter IRQ channel IRQ 12 jumper I2 IRQ 11 jumper I1 IRQ 10 jumper I0 IRQ 9 jumper I9 not recommended with Windows 3 x You must also set the corresponding IC pin pairs on jumper block J6 AL Set port address 340h no jumper 140h jumper extra jumper provided The host adapter BIOS supports booting only for the default port address of 340h J6 J4 Set...

Page 28: ...AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA A A A A A A A A A A A A A A A Jumper Block J9 AHA 1510A Pin Pair Description I2 I1 I0 I9 Set host adapter IRQ channel IRQ 12 jumper I2 IRQ 11 jumper I1 IRQ 10 jumper I0 IRQ 9 jumper I9 not recommended with Windows 3 x One and only one of these pairs must be selected for proper operation of the software AL Set port address 340h no jumper 1...

Page 29: ...sconnect however even if permitted by the host adapter this can usually be configured on the SCSI device Leave Enable Discon nection at its default value if the host adapter connects to two or more SCSI devices This optimizes SCSI bus performance If the host adapter connects to only one SCSI device set Enable Disconnection to no to achieve slightly better performance SCSI ID Each host adapter on t...

Page 30: ... whether the host adapter initiates synchronous negotiation with the SCSI device At the default setting yes the host adapter initiates synchro nous negotiation with the SCSI device If you change the setting to no the host adapter does not initiate synchronous negotiation how ever the host adapter always responds to synchronous negotiation if the SCSI device initiates it If neither the host adapter...

Page 31: ...s This means the SCSI host adapter intercepts all hardware interrupt 13 calls If the SCSI BIOS is successfully installed it can sup port up to two SCSI hard disks Non SCSI interrupt 13 calls are passed to the motherboard BIOS SCSI Boot SCSI boot capability is enabled by default J5 pin pair BT jumper on This means the host adapter intercepts hardware interrupt 19 during the boot process If the SCSI...

Page 32: ...therboard or non SCSI controllers Enabling more than one floppy controllers can cause your system to hang Optional Host Adapter Settings AHA 1520A 1522A host adapters also have the following optional configuration settings which you should not change unless you thoroughly understand the consequences of doing so Data transfer mode SCSI Floppy Floptical Fast SCSI Extended BIOS Translation for DOS Dr...

Page 33: ...st SCSI for these devices If the host adapter is set not to negotiate for synchronous data trans fer i e Initiate Synchronous Negotiation is disabled then the value selected here is the maximum rate at which the host adapter accepts data from the device during negotiation This is standard SCSI protocol Extended BIOS Translation for DOS Drives 1 GByte This setting enables or disables extended trans...

Page 34: ...rent Date 11 18 94 ECN Date 11 29 94 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA A A A A A A A A A A A A A A AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA A A A A A A A A A A A A A A A ...

Page 35: ...s Changing the SCSI IDs of devices that have duplicate IDs Installing the host adapter in your computer Connecting the SCSI devices to the host adapter See your computer hardware documentation for more information AHA 1510A 20A host adapters are configured to provide optimum performance for most systems Read Chapter 2 Host Adapter Config uration to learn about changing host adapter configuration N...

Page 36: ...g on some SCSI devices when you install them In general the procedure for terminating the SCSI bus is as follows 1 Determine which two SCSI devices including the host adapter are at the two ends of the SCSI bus Terminate these devices if they are not already terminated 2 Disable termination on all other devices on the SCSI bus if it is not already disabled Terminating SCSI Devices Most SCSI disk d...

Page 37: ...ermination setting follow the instructions in Terminating the SCSI Bus on page 3 2 The following sections explain each of the three configurations Termination for Internal Devices Only When only internal devices are connected to the host adapter the last device connected to the ribbon cable should be terminated and the host adapter should be terminated as shown in Figure 3 2 Devices Connected to H...

Page 38: ... Internal and External Devices When both internal and external devices are connected to the host adapter the last external device and the last internal device should be terminated and you should remove the three terminators i e dis able termination on the host adapter as shown in Figure 3 4 Caution If you replace the host adapter terminators make sure you maintain correct orientation The dot on th...

Page 39: ...s of disk drives CD ROM drives and other devices read their documentation and examine their switch settings or jumper settings 2 Change the IDs if needed so that no IDs are duplicated on the same host adapter We recommend the following IDs Leave the AHA 1510A 20A at the default SCSI ID 7 If you are installing Floptical drives set them to SCSI IDs 2 through 6 If you want to boot your computer from ...

Page 40: ...face on the com puter chassis then carefully remove the host adapter from its package 5 Position the host adapter directly over the slot If your com puter has a card guide to align the host adapter be sure to insert the end of the board in the card guide 6 Carefully press the bus connector on the bottom of the host adapter down into the slot as shown in Figure 3 5 until the metal contacts on the b...

Page 41: ... bus Most SCSI devices are single ended Read your SCSI device documentation if you are not sure whether a device is single ended or dif ferential Choosing SCSI Cables Always use high quality SCSI cables to connect the host adapter to devices on the SCSI bus Poor quality cables can cause data corrup tion parity errors and other problems High quality cabling is especially critical if you use Fast SC...

Page 42: ...I devices to the internal connector on the host adapter 1 Obtain a SCSI ribbon cable that has enough connectors to accommodate all of the internal SCSI devices If you need to physically install the SCSI device inside your computer before attaching the cables follow the installation instructions in the device documentation 2 Plug the SCSI connector at one end of the ribbon cable into the host adapt...

Page 43: ...on the ribbon cable as shown in Figure 3 7 Connecting External SCSI Devices You can daisy chain up to seven external SCSI devices to the external connector on the host adapter Daisy chaining means connecting mul tiple devices in a series as shown in Figure 3 8 A cable runs from the external host adapter connector to the first external device a sec ond cable connects the first external device with ...

Page 44: ...AA AAAA AAAA AAAA A A A A A A A A A A A A A A A Follow these steps to connect external SCSI devices 1 Attach the external SCSI cable to the external SCSI connector as shown in Figure 3 9 External cable orientation is automatic since connectors can be plugged in only one way 2 Attach the connector at the other end of the external cable to either one of the SCSI connectors on the external SCSI devic...

Page 45: ... A A A A A A A A A A A A A A 3 Daisy chain other external SCSI devices if any to the previous device until all devices are connected as shown in Figure 3 8 Connecting Floppy Drives AHA 1522A only The AHA 1522A floppy connector uses a 34 pin floppy ribbon cable with a 34 pin header connector Be sure to maintain pin 1 orienta tion as described in Connecting Internal SCSI Devices on page 3 8 1 Connec...

Page 46: ...A AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA A A A A A A A A A A A A A A A 2 Connect the split end of the 34 pin floppy ribbon cable to the connector on the first floppy drive A as shown in Figure 3 12 3 To connect a second floppy drive plug the middle connector of the floppy ribbon cable to the connector on the second floppy drive B as shown in Figure 3 13 First floppy drive Pin 1 Colored strip...

Page 47: ...e host adapter is firmly seated and secured in the slot The devices on each SCSI bus are properly terminated Each SCSI device on the SCSI bus has a unique SCSI ID Internal and external SCSI devices are firmly connected to the host adapter and pin 1 orientation is correct Only one floppy controller is enabled AHA 1522A only Many computers have floppy controllers on the motherboard or on a non SCSI ...

Page 48: ...rent Date 11 18 94 ECN Date 11 29 94 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA A A A A A A A A A A A A A A AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA A A A A A A A A A A A A A A A ...

Page 49: ...th your AHA 1520A 1522A host adapter Support more than two SCSI hard disk drives Remove or switch removable media for example Bernoulli cartridges while your computer is running Support CD ROM drives Support devices other than CD ROM drives and disk drives for example SCSI tape drives scanners plotters or WORM drives Disable the BIOS on the AHA 1520A 1522A host adapter Adaptec EZ SCSI If you are r...

Page 50: ...ices other than fixed disk devices and CD ROM drives check the hardware documentation for those devices If the device requires ASPI support you first need to run Adaptec EZ SCSI to install an ASPI manager and then install any other software provided with the device If the device is designed to interface directly with the host adapter then no ASPI manager is required See the Adaptec EZ SCSI User s ...

Page 51: ... system will not boot from the standard floppy drive or hard drive after initial hardware installation 1520A 1522A only Action 1 The LED on the host adapter should light up briefly when you power up the system If the host adapter detects an internal failure a message is displayed on the screen Return the board to the place where you bought it for repair or replacement 2 If the host adapter and SCS...

Page 52: ...ppear on the screen during booting AHA 1520A 1522A only This problem indicates that the host adapter BIOS is not running Action 1 Make sure the jumper is installed on pin pair BE of jumper block J9 This factory default setting enables the BIOS 2 Make sure that the host adapter is firmly seated in the slot 3 Make sure that there is no SCSI ID addressing conflict Check the jumpers for proper install...

Page 53: ...drive 2 Make sure that your config sys file contains this line device aspi2dos sys d Additional command line options are required for AHA 1510A host adapter boards See the EZ SCSI User s Manual for details Problem General difficulties using a SCSI drive as drive D with a standard hard disk as drive C Action 1 Make sure that hard disk 1 D is set to Not Installed or No Drive Installed with your CMOS...

Page 54: ...eck your drive manual for information on setting the SCSI ID for that device 3 Make sure that SCSI parity is consistently enabled or disabled on all devices on the SCSI bus 4 Make sure that SCSI termination is set correctly on the host adapter and the peripherals 5 If your system is running under DOS make sure that the disk has a DOS partition and a DOS format Problem The system works erratically ...

Page 55: ...he host adapter Check cables and jumpers Check for I O address conflicts Confirm that the con tents of the motherboard CMOS are set correctly with the Setup program Failed scanning for SCSI devices The driver failed when scanning the SCSI bus for SCSI devices Be sure that the SCSI drive s jumpers for SCSI ID and LUN are set cor rectly Be sure that all SCSI devices are powered up Check SCSI bus ter...

Page 56: ...ent Date 11 18 94 ECN Date 11 29 94 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA A A A A A A A A A A A A A A AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA A A A A A A A A A A A A A A A ...

Page 57: ...yond 1 GByte in for matted capacity they have run up against the DOS 1024 cylinder limit To continue its support for all SCSI disk drive capacities under DOS Adaptec has included an extended translation scheme for AHA 1520A 1522A host adapters This feature supports disk drives as large as 8 GBytes under DOS When to Enable Extended Translation Extended translation is disabled by default Use extende...

Page 58: ... translation The size of the par tition you request must therefore be a multiple of 8 MBytes If you request a partition size that is not a multiple of 8 MBytes fdisk rounds up to the nearest whole multiple of 8 MBytes Extended Translation Questions and Answers What happens if I enable extended translation with SCSI drives smaller than 1 GByte Drives handled by the AHA 1520A 1522A BIOS use extended...

Page 59: ... default Refer to Jumper Block J5 on page 2 4 to learn how to enable BIOS Support for SCSI Floptical Drives Floptical Installation Flopticals are SCSI devices and are installed in the same way as other SCSI devices See Connecting SCSI Devices on page 3 7 The AHA 1520A 1522A allows you to install Floptical drives at SCSI IDs 2 3 4 5 and 6 See the Floptical manufacturer s documen tation for instruct...

Page 60: ...ndard floppy as B without setting a standard A When two Floptical drives are installed they are recognized by the operating system as the first and second second and third or third and fourth floppy drives depending on the number of standard floppy drives installed Note that when a Floptical drive is added to the system as the third or fourth floppy device the DOS logical drive designator A B C et...

Page 61: ...A AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA A A A A A A A A A A A A A A A VHD Format Adaptec EZ SCSI includes the DOS vhdfmt utility for formatting Floptical VHD diskettes The vhdfmt program is provided because DOS 5 0 and earlier versions of DOS do not recognize VHD disk media Use your standard DOS Format utility to format 720 KByte and 1 44 MByte diskettes V...

Page 62: ...ent Date 11 18 94 ECN Date 11 29 94 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA A A A A A A A A A A A A A A AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA A A A A A A A A A A A A A A A ...

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