Old External Hard Drive

Discussion in 'Apple Collectors' started by Bobdude161, Apr 23, 2007.

  1. Bobdude161 macrumors 65816


    Mar 12, 2006
    N'Albany, Indiana
    I've had this external hard drive for a long time.


    A few years ago I decided to take it apart and tried to install a newer one in it, but then things got complicated and forgot about it.

    Today, I found it hiding in a closet and took a look at it. It's like a normal external hard drive except it came with a few extra wires.


    Looking at the hard drive that came with it, I can see some extra pins that I've never seen before.



    Taking a wild guess, the red and white wire 2-pin connector goes to the one pictures two up. Now there are 2 3-pin connectors left that seem to be wired to a SCSI ID number thingy (I know there's more of an intellectual word for it but this is all I can think of)

    Labeled next to the pins on the hard drive pictured in the last picture are:

    SS EP WS
    [ - - - ]
    [ - - - ]

    A2 A1 A0
    [ * - - ]
    [ * - - ]

    * means there is a jumper there

    I'm not sure what this is supposed to configure.

    Is there any way I can bypass this so I can install a newer one?
  2. DZ/015 macrumors 6502a


    Mar 23, 2003
    New England
    Looks like you've got an old Quantum ProDrive of some sort.

    The black/red wires are probably going to a drive activity led. The other small ribbon cable is, well, I don't know. I like to think if I don't know, they are unnecessary. As for the other items they are as follows:

    SS: self-seek testing of the drive mechanism
    EP: parity checking of data on the scsi bus
    WS: wait/spin option on power up of drive
    All 3 should have no jumper.

    The A0, A1 and A2 jumpers are for scsi ID setting of the drive.

    A0 = 1
    A1 = 2
    A2 = 4

    Combining these you can set your scsi id from 0 - 7. Yours is set for 4.

    Man, this is some old knowledge being dredged up.

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