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  1. D

    ATA bus speed, QS G4?

    Well, I tried a Sata device with an adapter, but I think the adapter I got is defective. Drive hangs during file copies, etc. it is recognized and I can format it. But it’s limited to 16.7MB/sec. I dug out an old ATA hard drive (a barracuda 7200.7 that supposedly supports higher speeds) and...
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    Clock running slow? (IIsi again)

    IIsi, new PRAM battery. Keeps settings when off, but clock is losing about 15 minutes a week. It's overclocked to 25MHz if that makes a difference. Is it likely cap goo or a damaged trace like here: https://68kmla.org/bb/index.php?threads/macintosh-iicx-slow-clock.46554/ Or is that relatively...
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    ATA bus speed, QS G4?

    New cable didn’t do anything. Bummer. I’m going to try a couple different ATA devices and see if I can find one that works at the advertised speed, I guess. I think I have an old HDD or two around here somewhere. That wouldn’t solve the problem, exactly, but it would at least be a data point.
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    ATA bus speed, QS G4?

    Yeah, it’s a 40GB SSD. Read the linked thread there. I guess I could try a new cable next. Thanks!
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    ATA bus speed, QS G4?

    The ultra ata bus (connector by the PCI slot.) Oh and I’m also using some cheap 40->44 pin ide adapters. (SSD & CF device both use the laptop style connector.) Might that make a difference somehow?
  6. D

    ATA bus speed, QS G4?

    So I’m wondering why my QS G4 is running its internal SSD at the slowest possible speed? I checked with and without the CF card adapter I use as a secondary drive. In both cases the drives seem to be stuck in 16.7MB/sec mode even though I know the SSD is definitely capable of faster. (I used...
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    Oversized HDD with Mac IIsi?

    Yeah, it just irks me, having to leave an external device plugged in like that. I was hoping to have it working "the right way" and not just "sorta works if you..." you know? :-( Do you know if the original HDDs for the IIsi included active termination or something extra? I wouldn't mind...
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    Oversized HDD with Mac IIsi?

    Okay, so I've dug out a couple other internal HDDs, some of which are even Apple OEM, and have found that _none_ of them are recognized without the ZuluSCSI plugged in. If it's plugged in, the drives format, mount, and can be booted from just fine. However, the drives all work fine in my other...
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    Oversized HDD with Mac IIsi?

    Is it possible the adapter requires termination power from the motherboard to work correctly? (Knowing that it works with a Quadra and the IIsi doesn't have termination power on its internal SCSI connector?)
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    Oversized HDD with Mac IIsi?

    This is the adapter that's on the drive. I thought RN1 and RN2 provided termination to the drive. Any idea how I could test/check those? I tried putting on a jumper of the "term power" jumper of the HDD but it doesn't make a difference...
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    Oversized HDD with Mac IIsi?

    And then it stoped working again as soon as I unplugged the external ZuluSCSI. Maybe it is a termination issue. Huh.
  12. D

    Oversized HDD with Mac IIsi?

    Well, it works now. The only difference was updating the driver and repartitioning with a patched version of HD SC Setup 7.3.5. Thanks for the advice!
  13. D

    Oversized HDD with Mac IIsi?

    Disk Utility 1.7.3 included on this: https://www.macintoshrepository.org/931-apple-legacy-software-recovery-cd
  14. D

    Oversized HDD with Mac IIsi?

    Interesting; that's good to know. Thank you!
  15. D

    Oversized HDD with Mac IIsi?

    Have a 9GB scsi HDD I’m trying to use with a IIsi. I can boot from a CD image on a ZuluSCSI to format and install an OS. When I initialize the drive I get a prompt about volume size, so I create a 1GB volume. It mounts, I install an OS, and then… nothing. It won’t boot from the volume and if I...
  16. D

    AppleCD 600i (Sony CDU75S-25) Tray Belt

    Awesome thanks!
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    AppleCD 600i (Sony CDU75S-25) Tray Belt

    Hi; any chance you have a link for that multipack? I’m in the same boat. 😀
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    AppleCD 300i Replacement Belts?

    Hi, I've got an AppleCD 300i Plus, (Matsushita CR-503-K) in my Quadra 650 which works, but only mostly. It reads cds fine, and will eject the tray when there's a CD in it ok. But if I hit the tray button when the drive is empty, the tray sticks and I have to tap the left side of the tray to get...
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    My IIsi is not booting

    You might want to check all the traces going in and out of the onboard RAM; those are used for VRAM. (U[F|G|H|I][6|7]) A lot of people seem to end up having to replace the chips. C9/C10/C11 are required for sound to work; if you're getting anything weird sound-wise, you might have to resolder...
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    Found the 50MHz bus switch on Alchemy (5400/6400)

    Damn, I'm glad that card still worked after all that time in storage! Nice fix, too!
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