Disk First Aid cannot unmount disk

Question

Disk First Aid cannot unmount disk

I installed a Belkin FSU 220 USB 2.0 PCI card into my G4 466 (Digital Audio).
Now when I run Disk First Aid I get an error that my Hard Disk cannot be unmounted when I try to repair it. Additionally, the computer will not awake from the sleep mode. I took the card out and the hard disk will still not unmount. I have reset the PMU, zapped the PRAM and ran fsck all to no avail.
I understand that many USB cards creat the sleep issue but why can't I run Disk Utility?

G4 (Digital Audio), Mac OS X (10.3.9), 1 Gig Ram

Posted on Dec 15, 2005 7:40 AM

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Answer 1

Dec 15, 2005 8:09 AM in response to Jerry Landers

Which hard disc are you referring to? The HDD containing the System cannot be umounted unless you boot from the OS Installer CD/DVD and run Disc Utility from there...

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Answer 2

Dec 15, 2005 9:16 AM in response to Hussein-New-York

I'm sorry. I shouldn't have posted my problem before I had my coffee this morning. First off, I meant Disk Utility not Disk First Aid. I am starting from the eDrive in Techtool Pro. Not only will Disk Utility not unmount my HDD but neither will Tech Tool Pro. I suspect that some file on my Hard Drive is corrupted causing these utilities to "think" that the HD is in use and therefore unmountable.

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Answer 3

E.Moore

Level 3

610 points

Dec 15, 2005 9:49 AM in response to Jerry Landers

Can you boot from an OS X installer disc and run Disk Utlity? From there you should be able to repair/unmount the disk.

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Answer 4

Dec 15, 2005 10:38 AM in response to E.Moore

Unfortunately, I bought this computer used and it did not come with any installlation disks.

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Answer 5

Dec 15, 2005 11:37 AM in response to Jerry Landers

Have you confirmed that the version TTP is appropriate for your version Panther?

You are between a rock and a hard place; you need OS installer CD's; there is no way in your current situation you can deal with any event that requires an OS re-install.

You really should back up any important files you have ASAP, then boot from a Panther or TTP CD & run from that.

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