Hard drive will not mount after optical drive upgrade

I recently performed an optical drive install. Had to remove the hard drive bays (I use three hard drives - Luckily, 2 run OSX).
I carefully removed all three drive bays and the empty bay. When I inserted the drives into the computer I had changed the position, swapping one OSX drive with a different one and reversing the drive bays. On restart, the computer started on the drive I had not selected for startup and I received an error message stating the other drive could not mount and it gave three options (Initialize - Ignore and Eject).
I can see the drive in Disk Utility and repair the permissions (it's also located in the System Profile).
I tried a few things I read in the community using various Terminal commands but was unsuccessful.
(Let me point out that I recently switched from a PPC G5 to MacPro and swapped the drives from PPC into MacPro and all has been fine until I removed changed their positions in the bays)
Any suggestions/help would be greatly appreciated.

I would recommend you reformat your drives that you brought over, and if possible put in a Firewie case.
Swapping drives will normally not matter but you should use Startup Disk to reset the default after using Option key the first time.
Putting in an optical device shouldn't require removing the drives to get the cage loose and let you put in a 2nd superdirve.
G5 used APM partition map, Intel Macs use EFI and requie GPT/GUID.
A drive with just data should not matter but that is not fool-proof either.
A drive iwth the system from a G5 though can.
During startup the boot process scans all volumes and looks for systems and mountable volumes.
Pull all the drives except the one with OS X that you were using, and put that in bay #1.
I've moved arrays between bays and that never "broke" the array or had trouble mounting and using (even moving to ODD ports).

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How do I repair a hard drive that was being written to while my MacBook Air crashed? (Drive will not mount)

My external backup drive will not mount. I have tried to mount it in Disk Utility via the app and the command prompt but the attempt times out. Any suggestions?
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Ciao.

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Hi guys ... this is my first post in these forums, so sorry if it is in the wrong category.
I have a Mac Pro, purchased in Feb this year. I have an iOmega Ultramax firewire drive, that is partitioned into four disks.
I have had time machine running well, and it backs everything up onto a second iOmega drive I have.
Yesterday, before I left for work, I saw TM was sbusy backing up. The finder was not responding but I just left it, as didnt have time to loko into it before leaving.
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The only problem I have, is I cannot even mount the drives to format them!
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The only problem I have, is I cannot even mount the drives to format them!
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Firewire drive will not mount on PowerBook

Firewire drive will not mount on PowerBooks
Posted: May 2, 2006 8:09 AM
Reply Email
Hi All,
A friend of mine has a Titanium Powerbook G4 500's with 640mb ram and OS 10.2. She has purchased a Fantom Drive 120gb Firewire drive to back up her work. The drive will not mount on her machine. It will mount on my G5 running 10.3.9. I went to the Fantom Site, and all I could find was a link to Apple's site on Tiger.
She bought a set of Panther disks and wanted to back up all of her stuff before the upgrade.
Any help would be appreciated,
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Thought you could use this info about getting FireWire to work!
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Try resetting your FireWire ports by disconnecting all FW devices, shut down your Mac and unplug it from AC power (wall socket) for 30 minutes. plug it back in and try FW.
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If that still did'nt get it Zap the PRAM. While restarting Mac hold down the following key combo Command-Option-P-R. Keep holding those keys down till you hear the second start-up chime, then release.
For those of you with Macs that are not PowerBooks or iBooks, a bad internal battery can cause FireWire to not be recognized, so make sure it's good!
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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.
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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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This is driving me nuts. I LOVE this computer, but I have WAY more invested in music than the cost of the computer.
Thanks in advance.
Message was edited by: hempomatic

It took a while to figure it out but apparently there was a conflict with bluetooth. I disabled it and all is well.

External Hard drive will not mount on Macbook Air (mid-2011) OSX 10.9.4

Hello Everyone!
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You may believe this is Apple's problem but I just like Baltwo have had absolutely no problems with any of my Firewire drives in Lion. So unless you can come up with much stronger evidence to the contrary, I doubt that your feeling are going to carry any weight at all.
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