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An OS 9 / Classic fix for unmountable FireWire drives
Authored by: Cameroon on Aug 27, '04 12:29:24PM

You may want to be careful. I had a similar (though not quite the same) problem with an external firewire drive that I have. I could mount and work with it in OS 9, but in OS X it would quickly become unusable.

In my case, the disk would show up and would mount but then would spontaneously become unavailable. It was becoming unavailable because the directory information (the data that the computer uses to know where everything is on the disk) was being erased.

The issue was a firmware bug for the Oxford chipset that the firewire controller in the drive enclosure was using. You may want to find out what chipset is running your firewire drive (or drives) and whether there are any firmware updates for them.

I believe the problem was a semi-well documented issue at one time, but when I purchased the drive the issue had been out of the news for awhile and it took some digging to find what I needed.

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An OS 9 / Classic fix for unmountable FireWire drives
Authored by: johnsawyercjs on Aug 27, '04 08:44:36PM

Another reason to be careful about rebooting into OS 9, with any volume (not just Firewire drives), is that some volumes you've been using under OS X, can sometimes suffer directory damage if you stay in OS 9 for a while (an hour or so has been my experience). If I have to boot into OS 9 these days, I generally try to get my OS 9-specific stuff done quickly and then reboot into OS X, or I first disconnect my most important drives (I usually have three or four connected).

Another possible fix for volumes that won't mount, might be to trash the contents of the invisible "Volumes" folder at the boot drive's root level (don't trash the Volumes folder itself, since OS X may need to see it present to work properly), where aliases of each attached volume are kept--maybe they sometimes get damaged.

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