Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: External Hard disk Iomega 2 Tb recognized by pc but can't be formatted

31 Jul 2013   #1

windows 7
External Hard disk Iomega 2 Tb recognized by pc but can't be formatted

Hi everyone
I'm new here and even though i have been reading a lot of usueful threads , i couldn't solve my problem at all.

Well i have an external HDD Iomega 2Tb , that after a while stopped to work entirely.
At first i would get "corrupted data " messages on windows 7, but now i can't access any of its content, even though as soon as i connect it to my pc it DOES get recognized and has a letter assigned, but i just can't do anything on it.

I tried formatting it via windows but the proccess fails before even starting( it looks like any pc i connect it to, detect it at first(like a couple of seconds) but then its connection goes off even though its usb cable is perfect and i also tried connecting with several different cables just to be sure.

Then i used several programs, like "hard disk low level format tool" which as soon as i start the formatting process gives error strings and doesn't even start the process at all( remains stuck at 0%)

I also tried to use "Hard disk sentinel" program which gives it a status of 0% health and suggests me to back its data up. Too bad i just can't access it at all. it also states "REALLOCATED SECTORS COUNT"

I tried booting my pc with gparted and seeing if it could somehow formatting it and assign a new partition but it's like each program can access for a very short amount of time( the hdd led blinks as well) then it can't be accessed anymore and "gets lost" (its led stops blinking as well).

My System SpecsSystem Spec
31 Jul 2013   #2

Microsoft Community Contributor Award Recipient

Windows 7 Ultimate 64

Welcome to SF gabriel,

I would double check the connection by trying another USB port and changing the cable and let us know if that helps.

Sorry you tried different cables I see, does the drive show up in the bios? Does the drive have an alternate connection like esata or firewire you could try?
My System SpecsSystem Spec
31 Jul 2013   #3

Windows 7 Home Premium 32 bit

1. Please post a screenshot of how your ext. HDD in question appears in Disk Management. Disk Management - Post a Screen Capture Image

2. Connect your ext. drive to another working PC, check and report what happens.
My System SpecsSystem Spec

31 Jul 2013   #4

windows 7

aalright i attached a pic just like you asked.

i tried connceting it to another pc but the results are the same.
it doesn't have an alternative way to be connected beside via usb.

oh and the pics language is Italian i hope it's not a big deal. It's the disk drive 1 , status online, primary partition.

alright i removed it from its case and this is what i got:


thank you very much for your help


Attached Thumbnails
External Hard disk Iomega 2 Tb recognized by pc but can't be formatted-hdd.jpg  
My System SpecsSystem Spec
01 Aug 2013   #5

Windows 7 Home Premium 32 bit

OMG! Why did you take the HDD out of its casing? By handling the bare HDD you are likely to make matters worse.

OK, never mind. Put it back into its casing, connect your ext. HDD to your PC and check whether it looks the same (RAW) as in your previous screenshot.

If so you will run Partition Wizard bootable CD version booting from the CD/pen drive and run Partittion Recovery Wizard in it to recover the partition.

Download Partition Wizard Bootable CD ISO from Free download Magic Partition Manager Software, partition magic alternative, free partition magic, partition magic Windows 7 and server partition software - Partition Wizard Online

a) Burn the ISO to a CD and boot from the CD to run Partition Wizard

or b.) create a bootable pen drive with the ISO as indicated in my post hard disk failure in sony vio laptop VPCSB38GA ( only that part dealing with creating a bootable pen drive with Rufus)

Now boot from the CD or pen drive and run Partition Wizard.

Follow the steps under Recovery with Partition Wizard: SanDisk Cruzer Blade 16GB in my thread Recover a flash drive turned RAW – Partition Wizard and TestDisk.

( In your case it will be your Iomega 2TB external drive. To avoid confusion, Remove all other USB drives and connect only the Iomega which you want to recover.)
My System SpecsSystem Spec
01 Aug 2013   #6

windows 7

alright mate i'm on it

i'll let you know how things turn out

thanks and bye for now
My System SpecsSystem Spec
01 Aug 2013   #7

Linux CENTOS 7 / various Windows OS'es and servers

Hi there
once you start getting up to 2TB disk sizes you need to change / convert it to a GPT drive -- 2TB is around the limit for standard "MBR" drives and at the limit you'll get problems.

Have a read of this for more info.

The other solution is to boot up something like a strand alone version of Partition Wizard and split the HDD into smaller partitions.

My System SpecsSystem Spec
01 Aug 2013   #8

Windows 7 Home Premium 32 bit

Hi jimbo45,

This is an extract from Microsoft Support article from Windows_support_for_hard_disks_that_are_larger_than_2TB

"In order for an operating system to fully support storage devices that have capacities that exceed 2 terabytes (2 TB, or 2 trillion bytes), the device must be initialized by using the GUID partition table (GPT) partitioning scheme............

Note that this article refers to disk capacity in powers of two instead of powers of 10, which is the more common designation on storage device capacity labels. Therefore, references to “2 TB” actually refer to a product that is labeled as having “2.2 TB” of capacity....................."

Hi Gabriel,

Inasmuch as your external HDD is only 1863.02GB (your screenshot) much less than 2.2TB you need not be concerned about this.

The only thing I am concerned now is that you had tried various methods to format your ext. drive and whether this has turned your ext. HDD, RAW. Never mind.

Run the Partition Recovery Wizard in Partition Wizard and check whether you can recover the partition. If partition recovery is successful, your ext. HDD will be restored to its former condition and you will be able to access all data in it.

If Partittion Recovery is not successful, you can try to format it with Partition Wizard.(if you don't want to recover data)
My System SpecsSystem Spec
01 Aug 2013   #9

windows 7

Thanks for your help and explaination JUMANJI

As of right now i'm Running the Partition Recovery Wizard in Partition Wizard as suggested to see if anything can be done.
The process is taking sooo long though.
Is it normal it's still stuck at 0% after several hours?
At this rate how long should it take? couple of weeks? wow just wow

Thanks everyone

as soon as partition wizard has finished i'll update my hdd status

My System SpecsSystem Spec
01 Aug 2013   #10

Windows 7 Home Premium 32 bit

How is your ext. HDD being shown in Partition Wizard?

If it is shown as "Bad Disk" ( and not as "unallocated"), then the prognosis is not good.

Since it is a 2TB HDD even Quick scan, may take quite some time. Wait for an hour or two and if it does not show any progress in the progress bar you may abort.

You have already tried Low Level Format and formatting with other Linux utilities without success. So I have to conclude that it is a BAD DISK.

As a last ditch attempt you can try to format it with HP USB Disk Storage Format Tool v2.2.3 HP USB Disk Storage Format Tool Free Download

It is an exe file. Right click on it and run as administrator. If it fails to recognise it or format it I would take it as a confirmation of bad disk.

In rare cases, it may a fault in the interface electronics of the enclosure. Since you had already taken out the Seagate drive ( which I normally do not recommend before trying out all possible means in the enclosure), you can hook it up as a second internal drive in a desktop and run Seagate Sea Tools for Windows. It will be the ultimate test for the integrity of the hard drive.

SeaTools | Seagate# Also read the guide by clicking on the link at right.

Run the Quick Test and if it fails, run the long test. If it can, it will repair your drive.
My System SpecsSystem Spec

 External Hard disk Iomega 2 Tb recognized by pc but can't be formatted

Thread Tools

Similar help and support threads
Thread Forum
iomega external ssd disk unknown offline, not initialized after format
Well, I really messed this one up... I have an iomega ssd model iomssdu part #31926500. Has been working great up until I intentionally chose an option to remove encryption on the device which formatted it. After format, unplugged from usb. From that point when repluged, nonfunctional. It...
Hardware & Devices
iOmega External Hard Drive Not Appearing Anywhere
A month ago, my father asked to take back the Mac he lent me, so he gave me his iOmega external hard drive to copy all of my information onto. iOmega External Hard Drive Model: EPHD-ME I did so, and waited for a month before I realized I was better off moving the information onto my Windows...
Hardware & Devices
Why USB external hard disk show now " The disk need to be formatted"
I don't know what is my problem because is not the first time that usb external hard drive is working fine until get damage and said " it need to be formatted " and lost all the INFO because I have to format again the disk to be usefull. Also it is not the same hard disk.:cry:
Hardware & Devices
How to run chkdsk on Iomega networked external hard drive
I tried to run a system image to the "Backup" folder of my Iomega external hard drive three times, without success. The error message asked me to run chkdsk on both the source (my desktop) hard drive and the destination (Iomega) drive. How can I run chkdsk on this external drive? I am willing...
Backup and Restore
Iomega ego 320 GB external HD not recognized
ok heres the sitch, my iomega hd was working for almost 3 months until last wik my brother borrowed it and plugged it in on a windows xp PC in their school and he said it doesnt work because there was a ballon pop up saying usb device cannot be recognized so i called him to bring it back home to...
Hardware & Devices

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

© Designer Media Ltd

All times are GMT -5. The time now is 01:07.
Twitter Facebook Google+