SCSI Trouble

Discussion in 'Apple Collectors' started by bunnspecial, Dec 10, 2014.

  1. bunnspecial macrumors 603

    bunnspecial

    Joined:
    May 3, 2014
    Location:
    Kentucky
    #1
    I may or may not be posting this in the right section, but thought I'd at least have a shot at getting an answer here.

    I'm trying to upgrade the drive in my Quadra 700 from the original 160mb to a 9gb 80 pin drive.

    I bought some of these adapters

    http://www.ebay.com/itm/SCA-80-PIN-...t=US_Drive_Cables_dapters&hash=item3cd7384ce0

    (not the exact listing, but the ones I bought were identical).

    Initially, I swapped out the cable in the Q700 for one with two connectors, set the ID on the second drive to "1", wired the second hard drive in, and used a 1-2 Molex splitter to power both drives.

    The computer booted just fine, but didn't seem to recognize the second drive. As the 80 pin drive was pulled from a Linux computer, I assumed that it would need to be initialized before I could use it, but was not prompted to do so nor could I get any indication that it was there. The drive was definitely powered up, as I could feel/hear it spinning.

    In any case, I decided to go over to my Digital Audio G4, which has a SCSI card in it. The card in the DA has two separate 68-pin busses, as well as a 50 pin bus. I hooked the original Quadra drive to the 50 pin bus, and the 80 pin drive to one of 68 pin busses(via the adapter). These two drives were the only SCSI drives in the system. My plan was to format the new drive, then copy the entire contents of the old drive over to it.

    Upon booting(into OS X 10.4) I was given a warning that one of the drives was unreadable by the computer and needed to be initialized. The 160mb drive from the Quadra mounted fine and was 100% readable. I went into Disk Utility and attempted to format the 9gb drive as a "Mac OS Standard" with 1 partition. The drive would not initialize and mount when I did this, although I did get it to initialize as Mac OS Extended.

    In any case, I shut the computer off and thought on it for a little while. It occurred to me that I might need to make the partitions smaller for Mac OS Standard, so I booted the computer back up proceeded to try again.

    Upon booting again, I could not access the 9gb volume at all. It appeared and was identified correctly under the parallel SCSI section of system profiler, but did not appear in disk utility in any form or fashion. The 160mb volume was still 100% accessible.

    I tried all sort of different iterations of connecting the drive. I tried different ID numbers. I tried both 60 pin SCSI busses on the card. I tried it on the 50 pin SCSI bus(set to ID 1) with the drive out of the Quadra. I tried it on the 50 pin bus without the Quadra drive connected. I even transported the whole mess over to my Sawtooth G4(running both 10.4 and OS 9) but with the same results. In all cases, the drive appeared in System Profiler, but was not accessible.

    I'll also add that I have a whole bunch of the 80 pin drives(18 or 20, I think) and tried several different drives. I also tried several different adapters.

    Any idea as to what could be going on?
     
  2. catzilla macrumors 6502

    catzilla

    Joined:
    Dec 15, 2013
    Location:
    Rhode Island
  3. MacTech68 macrumors 68000

    MacTech68

    Joined:
    Mar 16, 2008
    Location:
    Australia, Perth
    #3
    Yup, termination, "SCSI Voodoo", LVD, single ended, HVD - (HVD is unlikely).

    Would need to know the model of the drive to see what config jumpers might need changing to bring it back to a - ahem - old 5MB Narrow configuration.
     
  4. bunnspecial thread starter macrumors 603

    bunnspecial

    Joined:
    May 3, 2014
    Location:
    Kentucky
    #4
    I don't think that I have a termination issue.

    My SCSI card that I'm using in the DA is an Adaptec 39160. I read through the documentation on the card a little bit earlier this evening, and have a better idea of how to set it up.

    In any case, the card itself is automatically terminating. I've been trying this evening to connect only one of the 80 pin drives to it via one of the adapters set to ID 0. I don't have any documentation on the adapters, but I don't think they have any provision for termination at all. I'm connecting via a LONG Asus brand 68 pin SCSI cable which has a terminator attached to one end. The end without the terminator is plugged into the card, and the hard drive is connected at the other end of the cable immediately adjacent to the terminator.

    The 80 pin drives do not have any jumpers at all that can be set.

    With this set up as described above, I'm not even getting the computer to see the hard drive in system profiler.

    Just to check things out, I removed the 80 pin drive and plugged in a 68 pin drive(also ID 0) to the same location on the cable I was using. When I booted the computer, it was recognized just fine and I was able to initialize it. So, I don't think that there's necessarily anything wrong with the SCSI bus that I'm using to try and get these drives working.

    As I mentioned, I have a bunch of these 80 pin drives, and have tried enough different ones that I think I can rule out a bad drive being the cause of my issues. I'm wondering if perhaps the problem is either my adapters not being set up correctly, or are just bad.
     
  5. MacTech68 macrumors 68000

    MacTech68

    Joined:
    Mar 16, 2008
    Location:
    Australia, Perth
    #5
    In any case, what is the model number of the 80pin drive?

    Trust me, SCSI Voodoo is a real phenomenon. There may be something about this model of drive. Perhaps a mode page needs changing - if that's possible.
     
  6. bunnspecial thread starter macrumors 603

    bunnspecial

    Joined:
    May 3, 2014
    Location:
    Kentucky
    #6
    The 80 pin drives I'm using are Quantum Atlas IVs

    The full model on the one I'm looking at now is 9.1S KN09J011 REV 01-D 0808

    All the ones I've tried carry this same PN. I can dig through my stash and see if I can find a different one, but I'm pretty sure that they are all the same.
     
  7. MacTech68 macrumors 68000

    MacTech68

    Joined:
    Mar 16, 2008
    Location:
    Australia, Perth
    #7
    OK, on the drive's logic board is a 4 pin jumper.

    The rear most pair is "No Connection" - which is where the jumper will normally be if it's not being used.

    The pair of pins AWAY from the 80pin connector are the "SE" pair. Placing the jumer on this pair will force the drive into "Single Ended" mode, which is what you want.

    The best diagram I could find is actually on the top of some drives without a label over the top.

    Here it is:
     

    Attached Files:

  8. bunnspecial thread starter macrumors 603

    bunnspecial

    Joined:
    May 3, 2014
    Location:
    Kentucky
    #8
    Thanks-somehow I'd missed those jumpers!

    I'll try again this evening and see if I can get anywhere.
     

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