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Help: IDE to Compact Flash not working

Fizzbinn

Well-known member
Drive Setup usually is not keen on formatting what it sees as non-Apple drives.
Yes, but historically didn't that only apply to SCSI disks and Drive Setup? Back in the day I recall no such limitations with IDE disks of that era. Later, toward the end of the IDE (now called PATA) spinning disk era I think manufactures stopped supporting some of the old PIO modes some early IDE Macs were limited to, and I believe there are some disk size LBA limitations as well. I think some of the challenges in gettin our old Macs working with CF/SD/flash substitutes is how good these devices/adapters are at appearing to the system as a late 90s IDE hard drive. :cool:
 

Fizzbinn

Well-known member
I can’t think of a good reason why the 40 pin adapter works while the 44 doesn’t, they have exactly the same guts on them. If it’s easy for you to chuck it into another machine I’d sanity check to see if it could be defective. (That’s a downside of these super cheap electronics from China, I don’t think QA is really a thing.)

Since I have it out for other work, I'm going to try these in my UMAX SuperMac C500. Def could be be a bad adapter.
 

Gorgonops

Moderator
Staff member
Later, toward the end of the IDE (now called PATA) spinning disk era I think manufactures stopped supporting some of the old PIO modes some early IDE Macs were limited to, and I believe there are some disk size LBA limitations as well.

I'm not going to say this definitively because I haven't tried them on the era of machines we're dealing with here but the scuttlebutt is that issues with not supporting some of the more obscure data transfer modes is a significant issue for many IDE->SATA adapters. (And by extension those adapters that go from PATA to mSATA or M.2 SSDs.) Generally it seems like they work fine in anything that supports UDMA (ATA-4), and they also support the slowest PIO modes (needed at boot time even on modern controllers) but they barf on some of the higher PIO modes and the various DMA Single-Word modes defined in the ATA-1/2 standards. This makes them very hit-and-miss on mid-90's computers even if you ignore LBA/disk size issues.

I've also heard they sometimes don't do CHS addressing at all either, which can also be a problem with CF cards, and that deep-sixes compatibility with even older machines. The IDE->SD adapters at least seem to handle that adequately.
 

Spidey01

Well-known member
Yes, but historically didn't that only apply to SCSI disks and Drive Setup? Back in the day I recall no such limitations with IDE disks of that era. Later, toward the end of the IDE (now called PATA) spinning disk era I think manufactures stopped supporting some of the old PIO modes some early IDE Macs were limited to, and I believe there are some disk size LBA limitations as well. I think some of the challenges in gettin our old Macs working with CF/SD/flash substitutes is how good these devices/adapters are at appearing to the system as a late 90s IDE hard drive. :cool:
Combing one of the SD adapters mentioned earlier in the thread, I was able to dd my Wallstreet’s 2 GB IDE drive to a spare 8 GB SD card on another machine to verify booting off the adapter before erasing the original owner’s files.

When I went and loaded up a CD-R with 9.2.2, I was able to nuke, initialize, and load without any problems. So I’m assuming by the last Drive Setups they didn’t care, or the image must have been patched.

By contrast the unlatched 7.5 Disk Utils floppy I was using on my Duo’s BlueSCSI, didn’t work for me. Not that I’ve had any luck with that Hd SC setup in BasilliskII for that matter. Even trying to fudge data from the label of the Duo’s old DOA drive didn’t help, lol.
 
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