. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ontrack Computer Systems provides this reference as a . . service to assist users with their hard disk installation. . . . . .................................................. . . :: PLEASE, :: . . :: :: . . :: CONTACT YOUR HARDWARE VENDOR OR MANUFACTURER :: . . :: :: . . :: IF YOU HAVE HARDWARE DIFFICULTIES :: . . ::..............................................:: . . . . . For information on DISK MANAGER and specific computers, please . . check the DM.REF and README files on the DISK MANAGER diskette. . . . . . For a printed copy of this, or any other reference file, . . insert the DISK MANAGER diskette in drive A: and type . . . . COPY HARDWARE.REF PRN . . . . or replace HARDWARE.REF with the name of the file you want to print. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . This file describes the general rules for installing one or two internally mounted hard disk drives in a PC or AT environment. Any instructions provided by your dealer will supersede the information provided here. The four connections on the disk drive are: (A) Power (4-conductor), 1 per disk drive. (B) Command (34-conductor ribbon cable), 1 per 2 disk drives. (C) Drive select jumper pins, 4 to 8 pair per 1 disk drive. (D) Data (22-conductor ribbon cable), 1 per disk drive. Refer to connections (A), (B), (C), (D) in the drawings provided below. Page 1 __________________________________________________________________ | | | H H H DDDD D DD | | H H H D D D | | H H HHH H HHH H D D DD DDDD D D | | HHHHH H HH H HHHH D D D D D D | | H H HHHH H H H H D D D DDD DDD | | H H H H H H H D D D D D D | | H H HHH H HHH HHH H DDDD DDD DDDD DD D | / / / .------------------------------------------------. / | :NOTE: The connectors shown here may be found in : | | : different locations on your disk drive. : | | '------------------------------------------------' | | | | | | | | AA BBBBBB CCCC DDDDDD | | AAAA BB BB CC CC DD DD | | AA AA BB BB CC DD DD | | AA AA BBBBB CC DD DD | | AAAAAA BB BB CC DD DD | | AA AA BB BB CC CC DD DD | | AA AA BBBBBB CCCC DDDDDD | | | | Power Command Cable Drive Select Pins Data Cable | |__________________________________________________________________| | 0 0 0 0 | | | | | | | | | | | | | | | | X | | | | | | | '---------' | | | | | | | | | | | | | | | |_|_|_|_|_|_| |_| |_|_|_| |_| * * * This is the key slot which identifies the side of the connector towards which the colored edge (pin 1) of the cable must be facing. AA AAAA AA AA AA AA AAAAAA AA AA AA AA The power cable is keyed to ensure proper orientation. A separate power cable must be connected to each hard disk drive. There is no distinction between the power cables for drive 1 or drive 2. BBBBBB BB BB BB BB BBBB BB BB BB BB BBBBBB There are several types of command cables used to connect the hard disk to the controller. You will need to determine which of the cables listed below matches the cable you are using. The type of cable you are using will determine where the drive select jumper should be on your hard disk. Page 2 The pin nearest to the notch on the edge connector is pin 1. Pin 1 on the command cable may be identified by any of the following: 1. A triangle stamped on the connector, OR 2. A colored stripe on the end conductor of the cable, OR 3. A keying tab inside the connector (to prevent reverse insertion.) This cable is used in a system that has only one hard disk. .-------------------. | Connected to the | | controller | |___________________| * | | | | | | | | .---------->* | | | | | | | |<-----------------------------. |The star * | | | | | | | | This cable is designed for | |line * | | | | | | | | use with a single hard disk. | |indicates * | | | | | | | | The drive select jumper must | |the * | | | | | | | | be on the first position and | |colored * | | | | | | | | the terminating resistor | |edge of * | | | | | | | | should be left on the drive. | |the cable * | | | | | | | |<-----------------------------' ---------->* | | | | | | | | .-------------------. | Connected to a | | single hard disk. | '-------------------' The cable shown below is designed for use in systems that have two hard disks, although it can also be used in single hard disk systems. When attaching the cables to your hard disk and floppy disk drives, please make note of the following: 1. The cable used on the floppy drive has the reversed (twisted) wires nearest the edge with the colored wire (pin 1), AND 2. The wide (command) cable attached to the hard disk has the twisted (*) wires furthest from the edge with the colored wire (pin 1). * Your hard disk command cable may not have any twisted wires. If this is the case, please see the note below. Page 3 .------------------. | Connected to the | | controller | '------------------' * | | | | | | | | .----------->* | | | | | | | | |The star * | | | | | | | | |line * | | | | | | | | |indicates * | | | | | | | | |the * | | | | | | | | |colored * | | | | | | | | |edge of * | | | | | | | | |the cable * | | | | | | | | ----------->* | | | | | | | | .--------------------------------. * | | | | | | | | | This connector is for the 2nd | * | | | | | | | | | hard disk in the computer. The | * | | | | | | | | | drive select jumper should be | * | | | | | | | | | in the 2nd position and the | .-------------------. | terminating resistor should be | | Connected to the | <-' removed from the disk drive. | | 2nd hard disk. | <----------------------------------' '-------------------' * | | | | | | | | .----------------------------. * | | | | |\ /| | |If your cable does NOT have | * | | | | | | | |this twisted set of wires, | * | | | | | T | | |then drive one must have the| * | | | | | W | |<-----'drive select jumper in the | * | | | | | I | | NOTE! 1st position. | * | | | | | S | |<-----. * CAUTION * | * | | | | | T | | |THIS APPLIES ONLY WHEN THERE| * | | | | | | | |IS NO TWIST IN THE CABLE!! | * | | | | |/ \| | '----------------------------' * | | | | | | | | .------------------. |Connected to the | <--------------------------------. |1st hard disk | <. This connector is for the 1st | '------------------' | hard disk in the computer. If | | your cable DOES have a twist, | | then the drive select jumper | | should be in the 2nd position | | and the terminating resistor | | should be left on the disk | | drive. | '-------------------------------' CONTROLLERS: The controller pictured here is typical of PC/XT type controllers. Your hard disk controller may have a different layout of components, but it should have the connectors shown in the diagram. To properly connect the command and data cables to the hard disk controller, pin 1 must be located on the cable as well as on the controller. Pin 1 on the controller may be located by one of the following methods: Page 4 1. The number 1 printed on the card near one end of the row of pins (as shown in the diagram), OR 2. A square solder mark on the back side of the controller where the row of pins are soldered to the controller, OR 3. Controller card documentation. Pin 1 on the cables may be located by one of the following methods: 1. A triangle stamped on the connector, OR 2. A colored edge on one side of the ribbon cable, OR 3. A keying tab may be inside one of the connector holes that mates with a missing pin on the controller. | Command cable | |_______________| Data cable for _______________________________|_____________________ .---- the 1st drive | | ____ | | -------------------|---> :::::::::: ::::::::::::::::: |____| | | | 1 1 | | -------------------|---> :::::::::: _______ _______ ____ | | Data cable for | 1 | | | | |____| | | the 2nd drive | ____ | | | | | | | |____| |_______| |_______| ____ | | | _______________ |____| | | | | | ____ | | | | | ____ ____ |____| | | | |_______________| |____||____| ____ | | | |____| | | | 8 Bit Hard Drive Controller | | |____________________________________________________| | | | | | | | | | | | | | | | | | | |_|_|_|_|_|_|_|_|_|_|_|_|_|_|_| | The controller pictured below is typical of PC/AT type controllers. Your hard disk controller may have a different layout of components, but it should have the connectors shown in the diagram. To properly connect the command and data cables to the hard disk controller, pin 1 must be located on the cable as well as on the controller. Pin 1 on the controller may be located by one of the following methods: 1. The number 1 printed on the card near one end of the row of pins (as shown in the diagram), OR 2. A square solder mark on the back side of the controller where the row of pins are soldered to the controller, OR 3. Controller card documentation. Page 5 Pin 1 on the cables may be located by one of the following methods: 1. A triangle stamped on the connector, OR 2. A colored edge on one side of the ribbon cable, OR 3. A keying tab may be inside one of the connector holes that mates with a missing pin on the controller _______________________________ | | | __ | | _ ____ |__ | | _ | | | | |__ | | | | |_| | | |__ | | |_| | | | | |____| | | | | | | ____________ _____ | | | | | | | | |____________| | | | | _ _ | | | | | | | | | | | | |_| |_| |_____| | | | Data cable (D) for disk 2 | _ _ J3 ::::::::: |<--------------------------------- _____| | | | | | |_____| |_| |_| | Data cable (D) for disk 1 |_____| __ J2 ::::::::: |<--------------------------------- |_____| | | | |_____| | | | Command cable (B) for disk 1 & 2 | | | J1 :::::::::::::::: |<--------------------------------- _____| | | | |_____| |__| | This cable header is for floppies. |_____| _ J4 :::::::::::::::: |<--------------------------------- |_____| | | | |_____| |_| | |_____| _ _ _ | |_____| | | | | | | | |_____| |_| |_| |_| | |_____| _ _ _ _ | |_____| | | | | | | | | | | |_| |_| |_| |_| | |_______________________________| ____________________________________ | | | CCCC CC CC CC CC CC CC CC CCCC Page 6 The drive select jumper on your hard disk needs to be set according to the command cable used in your system. The proper drive select may be determined as follows: 1. If you are using a command cable with a single hard disk connector, the drive select jumper should be in the 1st position. 2. If you are using a command cable with connectors for two hard disks and wires 25-29 are reversed (twisted) between the two hard drive connectors, then BOTH HARD DISKS (*) should have the drive select jumper in the 2nd position. 3. If you are using a command cable with connectors for two hard disks and none of the wires are reversed (twisted), then the drive select jumper should be in the 1st position for drive one and the 2nd position for drive two. * The reversed wires make a hard disk with the drive select jumper in the second position react as drive one. DDDDDD DD DD DD DD DD DD DD DD DD DD DDDDDD The data cable is the narrow ribbon cable. You will need one data cable for each hard disk installed in the computer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ontrack Computer Systems provides this reference as a . . service to assist users with their hard disk installation. . . . . .................................................. . . :: PLEASE, :: . . :: :: . . :: CONTACT YOUR HARDWARE VENDOR OR MANUFACTURER :: . . :: IF YOU HAVE HARDWARE DIFFICULTIES :: . . ::..............................................:: . . . . . For information on DISK MANAGER and specific computers, please . . check the DM.REF and README files on the DISK MANAGER diskette. . . . . . For a printed copy of this, or any other reference file, . . insert the DISK MANAGER diskette in drive A: and type . . . . COPY HARDWARE.REF PRN . . . . or replace HARDWARE.REF with the name of the file you want to print. . . . . . . . . . . . . . . . . . . Page 7 . . . . . . . . . . . . . . . . . . . . .