USB LaCie Porche 500gb usb external drive won't mount

Here is the scoop.
A few days ago I was using my LaCie 500gb external drive and the usb chord was accidently yanked out whilst adding a photo to iphoto.
So i thought uh oh better close everything disconnect wait a while then restart.
So I did...plugged it back in...it made all the normal start up noises little amber light came on but it didn't appear on the desktop..nor in disk utility. But it did appear in system profiler.
Yesterday after resetting the "pram" or whatever it is that happens when you hold p + r + the apple key and alt....or ctrl and still no relief.
So i leave it plugged in over night to see if it is merely slow for some reason. When i awake this morning it is in disk utility even with the "time machine" volume...so presumably all the files are more or less still intact. But it still isn't mounting. So after clicking repair disk ....three or more hours later i get this in the log
2008-07-18 10:07:22 +0100: Verify and Repair volume “Time Machine Backups”
Starting repair tool: 2008-07-18 10:07:22 +0100
2008-07-18 10:07:22 +0100: Checking Journaled HFS Plus volume.
2008-07-18 10:07:22 +0100: Detected a case-sensitive catalog.
2008-07-18 10:07:22 +0100: Checking Extents Overflow file.
2008-07-18 10:07:22 +0100: Checking Catalog file.
2008-07-18 10:14:21 +0100: Checking multi-linked files.
2008-07-18 10:23:17 +0100: Checking Catalog hierarchy.
2008-07-18 10:42:25 +0100: Checking Extended Attributes file.
2008-07-18 10:42:46 +0100: Invalid sibling link
2008-07-18 10:42:46 +0100: Repairing volume.
2008-07-18 10:42:46 +0100: Rechecking volume.
2008-07-18 10:42:46 +0100: Checking Journaled HFS Plus volume.
2008-07-18 10:42:46 +0100: Detected a case-sensitive catalog.
2008-07-18 10:42:46 +0100: Checking Extents Overflow file.
2008-07-18 10:42:46 +0100: Checking Catalog file.
2008-07-18 10:49:46 +0100: Checking multi-linked files.
2008-07-18 10:58:37 +0100: Checking Catalog hierarchy.
2008-07-18 11:17:59 +0100: Checking Extended Attributes file.
2008-07-18 11:18:20 +0100: Invalid sibling link
2008-07-18 11:18:20 +0100: Repairing volume.
2008-07-18 11:18:20 +0100: Rechecking volume.
2008-07-18 11:18:20 +0100: Checking Journaled HFS Plus volume.
2008-07-18 11:18:20 +0100: Detected a case-sensitive catalog.
2008-07-18 11:18:20 +0100: Checking Extents Overflow file.
2008-07-18 11:18:20 +0100: Checking Catalog file.
2008-07-18 11:25:15 +0100: Checking multi-linked files.
2008-07-18 11:34:06 +0100: Checking Catalog hierarchy.
2008-07-18 11:53:38 +0100: Checking Extended Attributes file.
2008-07-18 11:54:01 +0100: Invalid sibling link
2008-07-18 11:54:01 +0100: Repairing volume.
2008-07-18 11:54:01 +0100: Rechecking volume.
2008-07-18 11:54:01 +0100: Checking Journaled HFS Plus volume.
2008-07-18 11:54:01 +0100: Detected a case-sensitive catalog.
2008-07-18 11:54:01 +0100: Checking Extents Overflow file.
2008-07-18 11:54:01 +0100: Checking Catalog file.
2008-07-18 12:01:19 +0100: Checking multi-linked files.
2008-07-18 12:10:29 +0100: Checking Catalog hierarchy.
2008-07-18 12:28:25 +0100: Checking Extended Attributes file.
2008-07-18 12:28:46 +0100: Invalid sibling link
2008-07-18 12:28:46 +0100: 2008-07-18 12:28:46 +0100: The volume Time Machine Backups could not be repaired after 3 attempts.
it would appear that the problem is "invalid sibling link"
Any ideas people.

nonononon...
Every tech will offer to reformat the HDD or suggest its broken.
The table of contents are corrupted.
What I do is remove the drive from the case and put it in a PC and run "mac drive" software then choose repair volume and your good to go.
Iv done this as a PC tech for several of my mac customers.
But for the life of me I cant appear to reproduce the issue and don't know what the issue is.
Several macbook guys have given me their "broken" USB drive and the TOS is corrupted. Its really a royal pain in the back side.
What is the issue, how to make it stop?

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LaCie external drive won't mount on iMAC

Hi,
My external LaCie external drive won't mount on my iMAC running 10.6.8 but will mount and show up on my PC as working fine, however I am not able to read the information on it as it was formatted for my iMAC. Therefore it leads me to believe this is a software issue.
I have reason to believe someone had changed the permissions and prevented the mounting of this external drive (which belongs to me) so that the contents won't be found on my iMAC.
How to resolve this issue?
Thanks in advance,
Cait

Cait,
Please try a SMC reset, it may take 2-3 attempts for it to work. Look over the instructions below carefully.
SMC RESET
Shut down the computer.
Unplug the computer's power cord and all peripherals.
Press and hold the power button for 5 seconds.
Release the power button.
Attach the computers power cable.
Press the power button to turn on the computer.
PRAM RESET
Shut down the computer.
Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
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Hi Support Crew...
I have a 13" MacBook(2,1) running OS X 10.6.2. This is a 2 GHz Intel Core 2 Duo machine w/ 4 GB RAM & 320 GB hard drive.
Today, I had the Iomega drive plugged in via USB, along with my soundcard (MOTU 828mk2) plugged in via FW. This is a very normal setup for me which has been bug free since I bought this computer over 2 years ago. When I plugged in my iPhone 3G via USB I got an error message which comes up when you incorrectly remove a device. This was strange because I didn't unplug anything, I only plugged in the iPhone. The iPhone was playing music when I plugged it in and I had to unplug and plug is back in to get iTunes to recognize it.
Ever since this happened, my Iomega external drive won't mount. I am able to access it via Disk Utility (and ran the Verify Disk/Repair Disk - everything is "ok"), however I can't access the data on the drive. I really really need the data but of course can't access it to backup.
Disk Utility log:
500.11 GB Ext Hard Disk Media (black text)
Iris (grey text) - I ran Verify Disk & Repair Disk
2010-01-22 14:20:51 -0800: Verify and Repair volume “Iris”
2010-01-22 14:20:51 -0800: Starting repair tool:
2010-01-22 14:20:51 -0800: Checking Journaled HFS Plus volume.
2010-01-22 14:20:52 -0800: Checking extents overflow file.
2010-01-22 14:20:52 -0800: Checking catalog file.
2010-01-22 14:20:56 -0800: Checking multi-linked files.
2010-01-22 14:20:56 -0800: Checking catalog hierarchy.
2010-01-22 14:20:58 -0800: Checking extended attributes file.
2010-01-22 14:21:00 -0800: Checking volume bitmap.
2010-01-22 14:21:01 -0800: Checking volume information.
2010-01-22 14:21:01 -0800: The volume Iris appears to be OK.
2010-01-22 14:21:01 -0800: Volume repair complete.
2010-01-22 14:21:01 -0800: Updating boot support partitions for the volume as required.
2010-01-22 14:21:01 -0800: Repair tool completed:
2010-01-22 14:21:01 -0800:
2010-01-22 14:21:01 -0800:
System Profiler shows the drive (on both FW & USB ports when I tried other cords). This drive does not require power and I am not using a USB hub, strictly the laptops ports. And yes, the laptop's power adapter is plugged in.
System Profiler: Device Tree log:
Iomega eGo HDD:
Capacity: 500.11 GB (500,107,862,016 bytes)
Removable Media: Yes
Detachable Drive: Yes
BSD Name: disk1
Product ID: 0x047c
Vendor ID: 0x059b (Iomega Corporation)
Version: 0.01
Serial Number: 000000066273
Speed: Up to 480 Mb/sec
Manufacturer: Iomega
Location ID: 0xfd300000
Current Available (mA): 500
Current Required (mA): 0
Partition Map Type: APM (Apple Partition Map)
S.M.A.R.T. status: Not Supported
Volumes:
Iris:
Capacity: 499.97 GB (499,972,702,208 bytes)
Writable: Yes
File System: Journaled HFS+
BSD Name: disk1s10
When I tried to run Migration Assistant, I just get the spinning search circle and none of the drives come up, just endless searching.
The fact that I got the "Improperly removed device" error when I plugged in the iPhone makes me think something weird is up and it's not actually the external drive. There is clicking/whining/noise, the drives powers up fine and is recognized by the system but the mount point is now "not mounted".
Does anyone have any idea how to fix? If you live in SF, I will buy you a beer.
J

I meant to say; "There are NO clicking/whining/noise sounds made by the external hard drive"

My external drive won't mount. Disk Utility says it can't repair disk and to backup the disk and reformat, but how can I do that if it won't mount?

My external drive won't mount. Disk Utility says it can't repair disk and to backup the disk and reformat, but how can I do that if it won't mount?

See mount section in 1st linked article.
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External drive won't mount. Options?

Hi everyone. I've used a LaCie 250GB D2 external hard drive for a little over two years with no problems. A few days ago, I bought a Western Digital 500GB drive to serve as my main external drive, so I decided to erase and reformat the LaCie drive, which I had previously partitioned into two volumes, to serve as an archive drive.
That's where my trouble started.
I deleted all my files off the drive and then selected Erase in Disk Utility. I checked the option to eight way random write over format the disk for increased security, but that seemed to be taking so long I just quit Disk Utility. I figured since I didn't have any data I was afraid of losing, it wouldn't be a problem.
The next day I tried to erase it again, but I got an error message that said something about my partition (sorry but I can't recall what the message was; at this point I still didn't think there would be any problem).
Yesterday night, I tried again to erase and reformat the disk. I selected the option to zero all data because I thought that might solve any hard-to-fix problems. I left Disk Utility running overnight and all day today--about 20 hours in all-- but the progress bar showed no progress. None.
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I've tried unplugging the drive and plugging it back in. Nothing. I own DiskWarrior, but as far as I can tell there's nothing DiskWarrior can do if the drive won't mount.
I'm wondering if disconnected the drive while it was running could have caused this problem. I might have done that inadvertently when it was taking so long to format. I figured that might result in loss of data, but I wouldn't think it would render a drive completely non functional.
I'm guessing the problem is probably a failure of the drive, but the fact that this only cropped up when I tried to reformat it seems suspicious to me.
If anyone has any suggestions for ways to get the drive to mount or format it, I'd sincerely appreciate hearing them. Thanks.

Thanks for quick reply. Boy, I really screwed up. I guess I didn't think I could permanently ruin a drive that way. I just assumed as long as the drive could spin and wasn't going bad, you could always reformat it.
Just so you know, I let my iBook run untouched for literally 20 hours in the zero out erase mode, but the progress bar showed no progress at all, so I think the drive must have already been broken by that point. I was prepared for it to take a day or more, but with no visible progress in 20 hours it would have taken weeks.

Kernel panic, now external drive won't mount

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*" If the worst happens and it cannot be mounted as is, what is the easiest way to get files off the drive so I can erase and reconfigure it?"*
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*"The second line — the working name I have given the WD500 — is grayed out."*
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Go here for help to Resolve Kernel Panics
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Repair Disk Permissions on the internal HD and also on the EHDs. Then do restart in Safe Mode and then do both SMC and PRAM resets.
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Shut down the computer.
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Press and hold the power button for 5 seconds.
Release the power button.
Attach the computers power cable.
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