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An OS 9 / Classic fix for unmountable FireWire drives Classic
I have had a ongoing problem with miscellaneous FireWire drives that won't mount. Clicking on the grayed-out drive in the Disk Utility only creates an endless beachball. After trying DiskWarrior, Data Rescue, and other various tools that were no help, I tried booting into OS 9 (sorry newer Mac owners) and the drive immediately showed up on the desktop. When I booted back to OS X, all was well and the disk just worked.

Next time it happened, I just started Classic and the drive came right up. I don't know how or why it happens, but it has worked with other clients' computers, as well.
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An OS 9 / Classic fix for unmountable FireWire drives | 5 comments | Create New Account
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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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An OS 9 / Classic fix for unmountable FireWire drives
Authored by: cudaboy_71 on Aug 27, '04 01:41:11PM

i had a similar issue recently (still running 10.3.2) on my 450mhz cube and a FW400 oxford 911 chipset ext. drive.

even tho i could have booted into os9 on the cube, simply turning around and mounting the drive on my b/w G3 400 still running os9 native fixed the problem on the osx cube.

my problem sounds more like the original poster's and not the first replier's.

---
if it aint broke, break it!



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An OS 9 / Classic fix for unmountable FireWire drives
Authored by: mshmgi on Aug 27, '04 03:32:36PM

I have experienced similar problems. The most reliable way I have found (it seems to work 100% of the time for me) is to reboot in single-user mode (holding [COMMAND]-S) - then run" /sbin/fsck -y". When I exit single-user mode I have 9 lovely firewire disk icons sitting on my desktop.

This might come in handy for those who haven't gotten around to installing Classic yet :)



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An OS 9 / Classic fix for unmountable FireWire drives
Authored by: johnsawyercjs on Aug 27, '04 08:34:58PM

I wonder if the problem has anything to do with the OS 9 desktop files needing to be altered/updated by OS 9 before some drives can be seen properly by OS X--I remember reading recently about some drive problem with OS X that was fixed by rebuilding the desktop files. You can do this in the Classic prefpane, so that might do the job for Macs that won't boot directly into OS 9.



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