Marijntje600

Q: macintosh classic hard drive not showing up.

Recenty i bought a different  hard drive for my macintosh classic becase the old one was broken. when i installed the new one it gave a error instead the floppy with questionmark. the error code was 000000f0000002. the hard disk spins up. the needle moves a bit and than just nothing. i installed the system on a floppy and tried to boot it with the floppy but it wont let me. i always get the error. if i disconnect the hard drive it booted the floppy and worked fine. (sorry for bad english)

iOS 7.0.1

Posted on Jul 29, 2015 10:01 AM

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Q: macintosh classic hard drive not showing up.

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  • by Jan Hedlund,

    Jan Hedlund Jan Hedlund Aug 1, 2015 3:09 AM in response to Marijntje600
    Level 6 (9,894 points)
    Aug 1, 2015 3:09 AM in response to Marijntje600

    >yes. the old hard drive has that to.

     

    ?

    Sorry, I do not follow you here. Do you mean that the new drive has A0, A1 and A2 positions? If so, are there any connecting jumpers in those positions?

     

    The SCSI ID is normally not important as such, as long as no other device has the same number. The ID can be anything between 0 and 6, but the convention is that ID 0 is used for a single internal hard drive (that is, normally, no jumpers at all at A0, A1 and A2). If a hard drive had ID 7 (all three positions A0, A1 and A2 connected by jumpers), it would be in conflict with the computer itself (which has ID 7).

     

    Any exact model number or text about jumpers on the other side of the hard drive?

     

    >no I haven't put resistor packs in them. (bit of a no obligation with boards)

     

    ?

    I meant resistor packs on the controller board of the hard drive itself. It looks like there are two (removable?) resistor packs parallel to the hard drive connector. That ought to be OK, but there should not be an additional terminator where the hard drive cable meets the logic board of the computer.

     

    Hopefully, someone else here has more information, based on the photo of the new hard drive.

  • by Marijntje600,

    Marijntje600 Marijntje600 Aug 1, 2015 7:24 AM in response to Jan Hedlund
    Level 1 (4 points)
    Desktops
    Aug 1, 2015 7:24 AM in response to Jan Hedlund

    I've put a little connector between A0 but that din't make a diffrence and A1 also din't do anything. could it be that i received a failed hard drive?

  • by Jan Hedlund,

    Jan Hedlund Jan Hedlund Aug 1, 2015 8:39 AM in response to Marijntje600
    Level 6 (9,894 points)
    Aug 1, 2015 8:39 AM in response to Marijntje600

    >I've put a little connector between A0 but that din't make a diffrence and A1 also din't do anything.

     

    As I indicated above, the chosen SCSI ID is not really of importance, if between 0 and 6, providing that no external SCSI device is connected. So you should (typically) have no connectors/jumpers/clips at A0, A1 and A2 (resulting in an ID 0 for a single internal hard drive).

     

    The only setting that could create a conflict (and error messages) would be ID 7 for the hard drive. ID 7 is reserved for the computer.

     

    The hard drive is supposed to be terminated when in a Macintosh Classic. Some drives have a TE jumper position in order to enable termination. Your drive appears to use another method; termination is enabled by plugging in resistor packs. So, the resistor packs must be on the hard drive's controller board in this very case.

     

    >could it be that i received a failed hard drive?

     

    Yes, (if termination is OK, and there are no SCSI ID conflicts) one would at least suspect that, since the computer seems to run well without the hard drive. You should ask the seller whether the drive had been tested, in which computer, and how it had been formatted.

     

    You may want to read more about SCSI. For example, try a web search for something like "Mac SCSI termination".

  • by Jan Hedlund,

    Jan Hedlund Jan Hedlund Aug 1, 2015 9:16 AM in response to Jan Hedlund
    Level 6 (9,894 points)
    Aug 1, 2015 9:16 AM in response to Jan Hedlund

    Addendum

     

    It will probably not make any difference at all, but it does not hurt to try it anyway. Under certain circumstances can bad SCSI hard disk drive drivers affect the system startup. Insert a bootable floppy, start the computer, immediately press and hold the four keys Command(Apple) + Option + Shift + Delete(Backspace). Any change?

  • by Marijntje600,

    Marijntje600 Marijntje600 Aug 18, 2015 6:24 AM in response to Jan Hedlund
    Level 1 (4 points)
    Desktops
    Aug 18, 2015 6:24 AM in response to Jan Hedlund

    sorry for the late responce. no it doesn't do any boot commands when the hard drive is connected. when i disconect it it boots floppy's and from the rom perfectly

  • by Jan Hedlund,

    Jan Hedlund Jan Hedlund Aug 18, 2015 10:22 AM in response to Marijntje600
    Level 6 (9,894 points)
    Aug 18, 2015 10:22 AM in response to Marijntje600

    If a hard drive prevents the computer from starting up, either from ROM or from a floppy, one would suspect that something is wrong with that drive. When you said that you disconnected it, did you mean completely (the hard drive's power and SCSI connectors) or just the hard drive's power connector?

     

    Also, how did the computer act when the old hard drive was in place? Was it then possible to boot from ROM and/or floppy?

  • by Marijntje600,

    Marijntje600 Marijntje600 Aug 21, 2015 9:18 AM in response to Jan Hedlund
    Level 1 (4 points)
    Desktops
    Aug 21, 2015 9:18 AM in response to Jan Hedlund

    i disconnected only the powercable and when the old hard drive is connected it gives me the floppy with questionmark but it does boot to the rom. i contacted the store and they just stopt replying. they just ignore me.

  • by Jan Hedlund,

    Jan Hedlund Jan Hedlund Aug 21, 2015 2:00 PM in response to Marijntje600
    Level 6 (9,894 points)
    Aug 21, 2015 2:00 PM in response to Marijntje600

    At this point, the behaviour of the new hard drive appears to be suspicious, but we do not know for sure. It is very difficult to diagnose a problem with access to merely a semi-working computer.

     

    The exact new hard drive model name/number is still not quite clear. "540S" can be seen on a label, but there may be additional information of interest on the other side of the drive. The jumper situation is also a bit unclear.

     

    Have you tested the new drive without the resistor packs (if in fact removable), with or without a terminator connected to the external SCSI port? However, please note that there is a risk that the computer and/or the hard drive may become damaged because of improper SCSI termination.

     

    You should really try to locate another approx. 1991-1997 Macintosh computer (with a built-in floppy drive, and preferably Ethernet and a CD-ROM drive), that could be used to create special bootable disk tools floppies (for example, with Lido 7.56, and Mt. Everything or SCSIProbe). An external SCSI enclosure (for a hard drive or a CD-ROM drive) could be useful in order to connect both hard drives (the old and the new) to the SCSI port of the other Mac for tests. Also, a SCSI Zip 100 drive would allow some comparative tests at the Macintosh Classic.

  • by Jan Hedlund,

    Jan Hedlund Jan Hedlund Aug 22, 2015 1:35 AM in response to Jan Hedlund
    Level 6 (9,894 points)
    Aug 22, 2015 1:35 AM in response to Jan Hedlund

    Also, it may be wise not to rule out a possible issue involving circuits (SCSI?) in the Macintosh Classic. Has the logic board battery (3.6 V) voltage been checked? Under certain circumstances, with some computer models, a bad battery can cause unexpected problems. Resetting the PRAM (holding down the four keys Command+Option+P+R at startup) is a procedure that often does not lead to anything, but sometimes it helps. There could be faulty components on the boards (one may want to use a magnifying glass or a microscope in an attempt to discover various cracked/discoloured electronic components, leaking electrolytic capacitors and bad solder joints).

  • by Marijntje600,

    Marijntje600 Marijntje600 Aug 30, 2015 12:58 PM in response to Jan Hedlund
    Level 1 (4 points)
    Desktops
    Aug 30, 2015 12:58 PM in response to Jan Hedlund

    Thanks for the help but it was the hard drive. I orderd a new one and it works perfect. thanks for the support.

  • by Jan Hedlund,Helpful

    Jan Hedlund Jan Hedlund Feb 12, 2016 4:30 AM in response to Marijntje600
    Level 6 (9,894 points)
    Feb 12, 2016 4:30 AM in response to Marijntje600

    Hi,

     

    Glad to hear that it is working now.

     

    Jan

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