IMac Disks will not mount under OS 9...

...only through Tiger.
I have an iMac G3 500mhz. It has a partitioned drive, and is running OS 9.x and Tiger. If I insert a CD, it won't mount on the desktop in OS 9. Also, firewire & USB drives won't mount in OS 9.
When I'm in Tiger, these items mount without issue.
What is the problem? Anyone else experience this?
Thanks,
Chris H.

Not sure about the CD, because a CD can have various formats. Some are not readable under Mac OS 9. What CDs have this problem, or is it all CDs? If it's all CDs, the CD driver (in Extensions folder) may be disabled. You can check using Extensions Manager.
For the hard drives, they should be formatted as HFS+ (also called Mac OS Extended). Not only that, but if they were formatted using a Mac OS X, that checkbox in Disk Utility for +Install Mac OS 9 Disk Drivers+ needs to be checked. If should be by default, but if it was unchecked during formatting or partitioning, then Mac OS 9 will not be able to access those drives. And again, there may be some USB and FireWire extensions disabled, which would prevent any USB or FireWire drive from mounting.
The disabling of those drivers is likely if the Mac OS 9 System Folder was being used for Classic under Mac OS X. Mac OS X handles such driver functions, so an experienced Mac user would have disabled certain unnecessary extensions in the Mac OS 9 System Folder. But if that same System Folder is used to boot the Mac directly, those driver functions would be missing.

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  • Hard drive will not mount shows up in Disk Utility

    I have an external drive with a bootable OS X 10.6.8. I was in a transition between building up a SSD swapped drive. The SSD is installed in the CPU box but I have my old installation running from an external.
    I have several external hard drives. They are all Firewire. Some have USB 3.0 and or eSATA options but my MacMini only talks to Firewire and USB 2.0.
    I understand that you daisy chain Firewire drives and turn them on and off in sequence as they fall from the CPU box/case.
    Firewire is a power source. I run the external with the OS using an AC adapter but one Firewire drive is powered through Firewire.
    I have had as many as 4 external drives running along with the internal drive without a glitch while I was reorganizing files.
    Today I booted off the external drive. It was running fine. I turned on one Firewire drive (the one that runs on Firewire power). That drive stumbled. I recognized the sound when there is an interruption in power. This cause the external boot drive to stall. I had to force a reboot.
    Now the external boot drive will not boot up. It does not mount but Disk Utility sees it. The drive itself is bright and clear in Disk Utility but the partition (single) is faded out. I can run Verify and repair in DU. DU says it doesn't see anything to repair. It will not mount on its own or when I click the Mount button in DU. It does not produce an icon on the Desktop (because it is not mounting).
    I also have SpeedTools. But although it sees the drive I cannot do anything with it. None of its tools run more than a spli second before they fail.
    This drive has USB 3.0 and I see everything through USB that I see through Firewire. Connecting the other way did not get around the problem.
    Of course I will buy an AC adapter for every external drive and never run them using Firewire again but the horse is out of the barn.
    I have the original installation disks and could run the Archive and Install option but it would require physically swapping drives with the internal. I'd like to avoid it if possible. It is a MacMini and tedious.
    Any suggestions?

    I took the problematic hard drive and installed it in my Mac Mini so I could attempt a Safe Boot and then Archive and Install if necessary.
    Safe Mode didn't work. The drive produced the circle with a slash symbol.
    I reset the PRAM which was part of a list of steps to work through I found created by Apple Support.
    I was able to boot up to Verbose Mode and view the text of the boot process. I wrote it all down. I can answer questions about the content better than typing it all out exactly. It includes, "...journal magic is bad..." "...failed to open..." and ends with "...cannot mount root, errno = 19"
    I attempted Archive and Install however when it went to show what target drives were available it was a blank box and all buttons were grayed out.
    I rebooted and opened Disk Utility from the DVD. The drive appeared the same with the top main line bright and the partitioned volume faded. Still was unable to mount. I ran Verify and this time a red line of text appeared "Invalid content in Journal" and at the end I ran Repair. When running I could read line by line and at one point it showed "checking volume information" then the following line "Repairing volume" the following line "Rechecking volume" more line of checking then it ended with "The volume was repaired successfully."
    It still would not mount. I ran Verify again and again said "Invalid content in Journal" and this time it stopped midway saying "The volume was found corrupt and needs to be repaired. Error: This disk needs to be repaired. Click Repair Disk."
    I clicked Repair and it ended with The vol. was repaired successfully."
    Still unable to mount I began repeating Repair over and over. Each time it found something to repair and ended with a success message. After several more Repairs I tried Verify and it stopped midway saying to Repair the disk.
    Question: Does running Repair multiple times continue to correct bits and pieces little by little or is this a generic message and we should treat it as a problem Disk Utility cannot pinpoint and is just beating its head against the wall?
    The step by step instructions I downloaded mentioned running Repair more than once but it did not say that running it 20 times would erode some problems and eventually lead to a fully repaired disk (if the problem was something DU could take care of in the first place). At this point I have run Repair about 20 times total with a series of 10 back to back skipping Verify. I keep seeing the lines about invalid content in a journal and that it repaired something successfully. Yet I still cannot mount the disk.

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