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Installing the Drive

7

014–002139

CAUTION: You cancause electrostatic discharge (ESD) damage to the equipment by

improper handling. For information about avoiding ESD damage, refer
to the sectionAbout This Manual."

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Summary of Contents for 6662

Page 1: ...g the 3 1 2 Inch Disk Drive Models 6662 6796 and 6799 Copyright Data General Corporation 1992 All Rights Reserved Printed in the United States of America Rev 04 November 1992 Ordering No 014 002139 014 002139 04 ...

Page 2: ...MAC PRESENT PROXI SWAT TRENDVIEW and WALKABOUT are U S registered trademarks of Data General Corporation and AOSMAGIC AOS VSMAGIC AROSE PC ArrayPlus AV Object Office AV Office BaseLink BusiGEN BusiPEN BusiTEXT CEO Connection CEO Connection LAN CEO Drawing Board CEO DXA CEO Light CEO MAILI CEO Object Office CEO PXA CEO Wordview CEOwrite CLARiiON COBOL SMART COMPUCALC CSMAGIC DASHER One DASHER 286 D...

Page 3: ...an experienced radio TV technician for help WARNING Changes or modifications to this unit not expressly approved by the party responsible for complicance could void the user s authority to operate the equipment This device complies with Part 15 of the FCC rules Operation is subject to the following two conditions 1 this device may not cause harmful interference and 2 this device must accept any in...

Page 4: ......

Page 5: ...om 8 00 a m to 5 00 p m your time Monday through Friday The center will put you in touch with a member of Data General s telephone assistance staff who can answer your questions For telephone assistance outside the United States or Canada ask your Data General sales representative for the appropriate telephone number Avoiding Electrostatic Discharge ESD Damage The cover s and filler panel s instal...

Page 6: ...it In an emergency when an ESD kit is not available use the following procedures to reduce the possibility of an electrostatic discharge by ensuring that your body and the subassembly are at the same electrostatic potential CAUTION These procedures are not a substitute for the use of an ESD kit Follow them only in the event of an emergency Before touching any electronic circuits or boards inside t...

Page 7: ... a 5Ć1 4 inch half height drive and Version B is a 3Ć1 2 inch full height drive If you have Model 6662 Version A refer to the 014Ć001940 This document 014 002139 describes how to install and operate Model 6662 Version B There are two board layouts for Model 6662 Version B as shown in Figure 1 Model 6662 Version B 3 1 2 inch full height 332 Mbyte Board Layout 2 Model 6662 Version A 5 1 4 inch half ...

Page 8: ...er to your computer system documentation for the environmental specifications The singleĆended and the differential drive have no operational differences between them The only functional difference is that the differential drive can use a much longer SCSI cable and therefore can be physically located further from the CPU than a singleĆended drive For example the maximum length of a singleĆended SC...

Page 9: ...oard Layout 2 118 011199 Differential Model 6799 118 011414 Single ended Model 6796 Board Layout 2 118 015462 Single ended Model 6662 Board Layout 1 118 014069 Model 6796 Board Layout 1 118 011199 Single ended Model 6796 Board Layout 1 118 015462 Figure 2 Single Ended and Differential Disk Drives ...

Page 10: ...maged contact Data General as described in the section About This Manual 3 Make sure that the model and part numbers on the drive match the drive model and part numbers on your packing slip If you think you received the wrong drive contact Data General as described in the section About This Manual 4 Make sure that you received a 3Ć1 2 inch to 5Ć1 4 inch conversion bracket If you did not receive th...

Page 11: ...2 9 10 Model 6662 332 Mbyte Drive 118 014069 Board Layout 2 CNH1 jumpers 1 2 23 24 Terminator CNH7 jumpers CNH2 jumpers 1 2 3 4 1 2 9 10 jumper installed in KEY Model 6662 332 Mbyte Drive 118 014069 Board Layout 1 Figure 3 Locating the Jumpers and SCSI Bus Terminator Resistor on the Model 6662 Drive Board ...

Page 12: ...10 CNH1 jumpers CNH7 jumpers 1 2 3 4 CNH2 jumpers Terminator Terminator Terminator Model 6796 520 Mbyte Drive 118 015462 Board Layout 2 Figure 4 Locating the Jumpers and SCSI Bus Terminator Resistor on the Model 6796 Drive Board Setting the Jumpers on the Model 6662 and 6796 Drive Table 2 shows settings for the jumpers on the Model 6662 drive Table 3 shows settings for the jumpers on the Model 679...

Page 13: ...alling the Drive 7 014 002139 CAUTION You can cause electrostatic discharge ESD damage to the equipment by improper handling For information about avoiding ESD damage refer to the section About This Manual ...

Page 14: ...reselection retry count to unlimited Out Set reselection retry count to 10 11 12 In Reserved Out 13 14 In Enable SCSI bus parity Out Disable SCSI bus parity 15 16 In Enable synchronous mode transfer request from TARG target Out Disable synchronous mode transfer request from TARG target 17 18 In Enable LED during operation Out Disable LED during operation 19 20 In Enable motor start at power on Out...

Page 15: ...reselection retry count to unlimited Out Set reselection retry count to 10 11 12 In Reserved Out 13 14 In Enable SCSI bus parity Out Disable SCSI bus parity 15 16 In Enable synchronous mode transfer request from TARG target Out Disable synchronous mode transfer request from TARG target 17 18 In Enable LED during operation Out Disable LED during operation 19 20 In Enable motor start at power on Out...

Page 16: ...bsystem If one of these manuals requires a jumper setting different than the factory default setting for jumpers 1 through 24 for example enabling diagnostics mode instead of disabling diagnostics mode use needlenose pliers to add or remove the jumpers accordingly If there is no mention of the jumper s function in these manuals leave the jumper in the factory default position Installing or Removin...

Page 17: ... 6799 drive board CNH7 jumpers CNH1 jumpers CNH2 jumpers 1 2 21 22 10 2 9 1 CNH3 jumpers 1 2 3 4 1 2 jumper installed in KEY Model 6799 520 Mbyte Drive 118 11414 Figure 6 Setting the Drive Jumpers for Model 6799 Setting the Jumpers on the Model 6799 Drive Table 4 shows settings for the jumpers on the Model 6799 drive The boxes in this table indicate factory default settings for these jumpers The t...

Page 18: ...nable diagnostics mode Out Disable diagnostics mode 7 8 In Enable UNIT ATTENTION report mode Out Disable UNIT ATTENTION report mode 9 10 In Set reselection retry count to unlimited Out Set reselection retry count to 10 11 12 In Reserved Out 13 14 In Enable SCSI bus parity Out Disable SCSI bus parity 15 16 In Enable synchronous mode transfer request from TARG target Out Disable synchronous mode tra...

Page 19: ... need to specify this number when you access this drive with your operating system software CNH3 Jumpers 1 and 2 Jumpers 1 and 2 in Table 4 are used for factory testing Do not change the settings of these jumpers CNH2 Jumpers 1 through 4 Jumpers 1 through 4 in Table 4 are used for factory testing Do not change the settings of these jumpers CNH1 Jumpers 1 through 22 Refer to your operating system m...

Page 20: ...drive with two screws each as shown in Figure 7 Figure 7 Installing the 3 1 2 Inch to 5 1 4 Inch Conversion Bracket 2 Install the drive in a 5Ć1 4 inch half height drive slot in the computer or mass storage subsystem When you have installed the drive in the slot you are ready to connect the cables to it as described in the Connecting Cables to the Drive section Connecting Cables to the Disk Drive ...

Page 21: ...e subsystem Power cable provided by the computer or mass storage subsystem Frame ground wire not used Pin1 Frame ground not used Figure 8 Connecting the Cables to the Drive When Not Using a SCSI Bus Adapter Cable Connecting Cables When Using an Adapter Cable To connect the cables to the drive when you are using the SCSI bus adapter cable follow these instructions 1 Connect the computer system s or...

Page 22: ...orage subsystem SCSI bus cable provided by the computer or mass storage subsystem Frame ground wire not used Frame ground not used Figure 9 Connecting the Cables If you encounter a problem that you cannot solve using this document refer to the section About This Manual for information on how to contact Data General End of Manual ...

Page 23: ...inch conversion bracket 12 13 Jumpers Model 6662 default settings 7 location of 5 Model 6796 default settings 8 location of 6 Model 6799 default settings 11 location of 10 Mounting the drive in the enclosure 12 15 SCSI bus length 2 SCSI bus terminator resistor pack Model 6662 location of 5 Model 6796 location of 5 SCSI bus terminating resistor installing or removing on Model 6662 9 10 installing o...

Page 24: ...18 014 002139 ...

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