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  1. There was a SCSI connector once upon a time that...

    There was a SCSI connector once upon a time that wasn't very popular - it was about the same external dimensions as the common HD-50 pin connector but had a "ribbon" style connector inside

    57714
  2. is it possible that change was necessary for the...

    is it possible that change was necessary for the OEM disk drive that was included in the 4869 and not specifically the enclosure itself?
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    My dad's original caddy load drive came with one...

    My dad's original caddy load drive came with one and only one. The caddy load drive I just bought from Agent Orange also came with exactly one. I didn't realise people had spares... now I want more...
  4. Yeah that all makes sense, but what I can't quite...

    Yeah that all makes sense, but what I can't quite wrap my head around is that in the blog pictures you appear to be swapping Pin 6 and Pin 10. Neither one of those should matter for an "IBM" style...
  5. I was looking at the Shugart pinout which has DS3...

    I was looking at the Shugart pinout which has DS3 on pin 6 and DS0 on pin 10. IBM used pin 10 for Motor ON (drive A) and pin 6 for ? in the internal PC cabling, so apparently they moved motor on to...
  6. your pics don't show pin 1, but it appears you're...

    your pics don't show pin 1, but it appears you're just swapping DS0 and DS3? so in theory you could just change the DS jumper on the drive and leave the cable alone right?
  7. These will just plug in to the 5150/5160 FDC and...

    These will just plug in to the 5150/5160 FDC and work? DOS configuration notwithstanding, I just mean is the pinout the same?
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    what about the opposite? writing 9SPT on HD...

    what about the opposite? writing 9SPT on HD disks? is that likely to hold up?
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    Yeah. I can see the CF card being a solid choice...

    Yeah. I can see the CF card being a solid choice for a 5150/5160. Of course, the cache on the mechanical drives does confer real-world benefit as well so we can't count it out as a feature - it's...
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    Atlas' native sustained transfer rate was...

    Atlas' native sustained transfer rate was actually rated at 41 MB/sec, so a little closer to 15x :cool:

    Even the 1993 7200RPM Barracuda was able to edge out the CF card in sustained transfer on...
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    Eudimorphodon was correct, it was the cache...

    Eudimorphodon was correct, it was the cache skewing the results. I re-ran the test on the Atlas 10KII with file size set to 16MB: the 8K random, 70% read was averaging around 67 IOPS and sector...
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    I'm still not convinced that the 10K SCSI drive...

    I'm still not convinced that the 10K SCSI drive with busmastering HBA can't defeat the flash memory even in random access, but I will re-run the test as advised.
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    As far as how they "feel" honestly I think they...

    As far as how they "feel" honestly I think they feel the same.

    My whole argument is, put simply: "if you want to maximize storage performance on a slow CPU, there are other options than flash...
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    That's an interesting point, I'll try to circle...

    That's an interesting point, I'll try to circle back around to the test with a >8MB file and see if the results change substantively
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    I know it's kind of buried in my thread, but the...

    I know it's kind of buried in my thread, but the SCSI disk beat the CF card in both the "8K random, 70% read" and "sector random read" metrics of DISKTEST as well as sustained transfer metrics
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    The drive I got from Agent Orange is working...

    The drive I got from Agent Orange is working perfectly, so I'm good for now.

    Thanks to those who posted! (I'd still be onboard with a cheap IBM 3510 in beige to stick a recorder in if one comes...
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    Yes I'm sure it is faster than a MFM drive, but...

    Yes I'm sure it is faster than a MFM drive, but it's not faster than a good SCSI. Or probably even a modern IDE drive for that matter.
    ...
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    No, it isn't

    No, it isn't
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    If you don't have any IDE card at all, you might...

    If you don't have any IDE card at all, you might just want to purchase one with an integrated option ROM as Chuck alluded to. But I would wonder - if the XT-IDE ROM doesn't work on the 5170, would a...
  20. I always assumed most people proofread their...

    I always assumed most people proofread their posts before hitting send, not after.

    You wouldn't notice the problem unless you actually submitted the post (or previewed it I guess)
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    Even without cache, SCSI is faster on a 286, if...

    Even without cache, SCSI is faster on a 286, if you use a bus mastering HBA like the 1542. I did a whole thread on it a while back here. Obviously a cached controller would be better

    That's being...
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    I strongly doubt a standard 5.25" HH drive is...

    I strongly doubt a standard 5.25" HH drive is inside there. I've had several external SCSI disc drives fully apart over the years, and what I've experienced without exception is that if the exterior...
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    the idea was to acquire an enclosure that would...

    the idea was to acquire an enclosure that would fit a standard 5.25" disc drive, so I wasn't stuck with one drive should it fail

    old CD drives tend to be horribly flaky IME (especially the...
  24. sounds likely

    sounds likely
  25. I like this plan

    I like this plan
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