Please help. I have an external Iomega drive that I cannot reformat

I recently switched from a 2.4Ghz iMac to a MacBook Pro. I was using a 500GB Iomega external drive as the TimeMachine drive on the iMac, and thought it would be fairly straightforward to restore the backup from this drive on to the PowerBook, but it looks like it (the Iomega) is totally corrupted, so I have basically given up any hope with it, (whenever I plug it in to the MacBook, it causes the whole machine to freeze, and I could only do a hard power down).
Firstly, I tried to use Disk Utility to zero out the data, (from the Macbook Startup disk). No dice.
So then I tried to use Disk Util from the Install disk (holding down C after a hard power down).
It looked like it was going to start erasing the disk, (I selected 'zero out data'), so I left it over night. But again, the same problem.
How would I go about erasing/reformatting the Iomega when it simply causes everything to lock up?
Hoping someone can help.
Thanks.

Try it on another machine and see how it behaves. Sounds like the drive may be worse than corrupt - it might simply be unusable.

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I have an external hard drive that I cannot find on my macbook pro.

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Thank you

Welcome to Apple Support Communities
To access to your external disk, open a Finder window and choose it in the sidebar, under "Devices". Another way is to go to Finder menu (on the menu bar) > Preferences > General, and mark "External drives" to show it in your desktop. Then, you can read your data on your external disk and you can copy files, unless your external drive is using NTFS. In this case, you will have to use Paragon NTFS or format it

I keep getting "error occurred while attempting to import file *******. The disc your are attempting to use is full." I have an external hard drive that I moved files over to, but apparently they're also still on my hard drive? HELP!

I keep getting "error occurred while attempting to import file *******. The disc your are attempting to use is full." I have an external hard drive that I moved files over to, but apparently they're also still on my hard drive? HELP!

So you have backed up the content of the computer's hard drive, too?
That usually is a great idea since it is possible to lose use of the system
if parts of it have accidentally been removed or get over-written, or the
main system files get corrupted, when the hard disk drive gets too full.
If you have not trashed the originals of your created content, that remain
after you made copies on an external hard drive or other device, then
that is what you'd have to do to reclaim the capacity still in use by them.
What are specifications of the hard disk drive? The unused capacity
verses the used, in GB? If the hard drive has less than 15 to 20%
free or unused capacity, you could run into trouble. Mine are 40-50%
unused hard drive space, so ample room is available for automatic
Virtual Memory to use that capacity as temporary swap file space.
This is helpful when the computer could use more physical RAM
memory capacity, but doesn't have it. Or if the RAM is maxxed out
and you can't add any more. Virtual Memory is part of OS X and the
system automatically can use as much as is available, but it is better
to be sure there is plenty of resources available to include chip RAM
as well as unused or free hard drive capacity for use as VM.
If for some reason your files in Trash won't go away when you empty
it, you may have to restart. Be sure you have not included any System
files in the content in the Trash, or the Mac may not start up later on.
You may have to boot the computer from the install-restore OS X DVD
and run Repair Disk from its version of Disk Utility, to be sure it's OK.
I'm guessing that by now you know enough about the vintage system
in the older hardware to figure it out, so I won't write about it now.
In any event... hopefully you can simply trash the files, but check them
carefully, & you may need to remove (copy to archive first) even more.
Good luck & happy computing!

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Hi,
Check Finder>Preferences>Sidebar, is it checked there to show external drives?

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I have an external hard drive that shows up in disk utility but Verify and Restore are greyed out. I am trying to determine what is wrong with the drive.
I need the data on the drive and it won't show up in Disk Warrior. I have tried different Mac's and different USB cords only to find the same outcome. When selected in Disk Utility the information read as such...
Disk Description : WD Elements 1023 Media                      Total Capacity : 500.11 GB (500,105,740,288 Bytes)
Connection Bus : USB                                                               Write Status : Read/Write
Connection Type : External                                                     S.M.A.R.T. Status : Not Supported
USB Serial Number : 575837314135304D36373132        Partition Map Scheme : Unformatted
As the drive shows in Disk Utility there must be some life left in it surely. There is a possibilty that the physical connection between the USB cord and the external drive is damaged but since the drive shows up I believe it's unlikely... before I give it to the pro's is there anything else I can do to diagnose the issue?

Hello,
I have just experienced the same thing!
Although my external drive shows in Disk Utility, it does not show in Finder.
And the Verify/Repair buttons are also greyed out.
Also, although the drive is 2TB. DU shows it as having Total Capacity of only 4.14GB! (Which should be the Free Space).
I was wondering if you solved your problem, & if so, would you share your solution.
I´m afraid to Erase in case I lose all my Data on the drive.
Thanks in advance for your reply!

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You can't write to it because it's formatted as NTFS which OS X will read but not write to. If you want to continue using the drive with both a PC and OS X you will need to download and install NTFS-3G so you can then write to it from your Mac. You can get NTFS-3G at:
http://www.macupdate.com/app/mac/24481/ntfs-3g
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Yes you can. See the following:
Drive Preparation
1. Open Disk Utility in your Utilities folder.
2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Click on the Partition tab in the DU main window.
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4. Select the volume you just created (this is the sub-entry under the drive entry) from the left side list. Click on the Erase tab in the DU main window.
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HT4718 I have an external hard drive that I used as Time Machine Backup. I have not used it for a while and now, when I plug it in computer says: This disc is not readable. I want to recover the backups and not erase and reformat the disc. Thank you in

I have an external hard drive that I have used as Time Machine backup, but not for a while. Now when I plug it in, computer says this disc is not readable.
I want to keep the backups on it and not erase and start over.
Thank you in advance.
Gregor

It sounds like something went wrong with the drive. Did you drop it? How long has it been sitting around unused?

I have an external disc drive that is not taking discs any suggestions?, I have an external disc drive that is not taking discs any suggestions?

I have an external disc drive that is not taking discs any suggestions?

what make a model external? Did it work before with your Mac? More details needed.
ejecting right away, damaged loader
ejecting after several seconds dirty laser diode lens
(this is the typical scenario)
Insert a commercial DVD and what happens?

Please Help - Time Capsule and External hard drive Issues

Recently, I switched from Comcast to AT&T uverse as my internet provider and I started experiencing problems.
(1) I have a 4th generation Apple Time Capsule which I am using as my router.
(2) Connected to the Apple Time Capsule - USB - is an external hard drive (not for backup with Time Machine.)
(3) I have a 2011 Macbook pro which I use to access my file on my time capsule and external hard drive.
(4) I had been using my AT&T portable Hotspot from my cell phone to get internet access on my MacBook pro from remote locations to gain access to my external hard drive which is attached to the time capsule.
(5) On August 2, 2014, I switched from Comcast to AT&T and had the AT&T turn off the router function. (I have been using the router from my apple time capsule)
(6) Under Network I switched to bridge mode.
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Do I need to reset my Time Capsule since I have a new service provider. Everything else works fine - meaning able to get internet signal but unable to access my external hard drive and backup my time capsule. Please HELP.

(5) On August 2, 2014, I switched from Comcast to AT&T and had the AT&T turn off the router function. (I have been using the router from my apple time capsule)
(6) Under Network I switched to bridge mode.
(7) And since August 2, 2014 my time capsule has not been backup.
If you got ATT to turn off router function in their modem..
Then 6. is wrong.. You cannot have the Network switched to bridge mode..
You must have it set to dhcp and nat.
That is also why you cannot backup.. the TC is off the network.
Please change back to router mode in the TC.
Ensure the internet tab shows dhcp and you create a wireless network.
Then power down the TC... power down the ATT modem.. wait about 20min (you can try 5min.. but it might not be long enough).
Power up the ATT modem.. wait 2min for things to flash lights in de right blinkin order.. then start the TC.
Open the airport utility and make sure your TC captured the public IP and is now working as the router.
That should fix that end of it.. the hotspot end??
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Hello, Please help me if you can:
I have all of my data backed up onto a Seagate External Hard Drive, purchased just a few months ago. I just got a new laptop (MacBook Air) and need to get my data off of my hard drive, but it isn't showing up on my Desktop or Finder. It shows up in Disk Utility, but when I ask it to "repair" it says:
"Invalid B-tree node size
The volume could not be verified completely.
Volume repair complete.Updating boot support partitions for the volume as required.Error: Disk Utility can’t repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files."
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Hi, Brian, and welcome to the Discussions!
You might perhaps launch System Profiler (from Applications/Utilities) and see if the device is listed there under the FireWire heading in Hardware Overview.
Can you hear the LaCie spin up when powered on?
You might download the free trial version of Data Rescue II and launch it to see if it recognizes the drive. This software often does when DW or Disk Utility won't. If it does, run a scan with it to see if the data on the volume is viewable.
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Gary
1GHz DP G4 Quicksilver 2002, 400MHz B&W rev.2 G3, Mac SE30 Mac OS X (10.4.5) 5G iPod, Epson 2200 & R300 & LW Select 360 Printers, Epson 3200 Scanner

So, I have an external hard drive that was connected to my mac not able to access.

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Please help. I have an external Iomega drive that I cannot reformat

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