External Hard Drive 1TB corrupted and unreadable. In My Computer the drive appears but can not access. Right click for Check Disk doesnt work.

You can gain access to a working hard drive that is inaccessible when the system starts and assign it a drive letter under the Windows Explorer interface. Or, you can import foreign disks into Windows or create a partition and format them. You can scan a drive for bad sectors or lost clusters and repair the system files to allow access to a corrupted drive. In short, you can utilize the drives as they were intended to be used by completing some operating-system configuration steps that are occasionally required for some drive installations.

Click "Start" (the Windows Orb) and "Computer" to access the Windows Explorer screen. Right-click on the inaccessible drive and choose "Properties" from the context menu. Click the "Tools" tab and click "Check Now" under the Error-Checking section. Select both check boxes to allow the system to automatically fix file-system errors and to scan for and attempt recovery of bad sectors. Allow the system to run the scan the next time the system is booted. Restart the computer to complete the scan and check for access after the scan completes. Click "Start" (Windows Orb) and "Computer" to access the Windows Explorer screen. Right-click on the inaccessible drive and choose "Properties" from the context menu. Click the "Security" tab and click "Edit" to change permissions for the drive. Click "Users" from the Group or User Names section. Check the "Allow" box for full control and check for access after the settings are saved. Click "Start" and "Control Panel" and then click "Administrative Tools" and double-click "Computer Management" to launch the utility. Click "Disk Management" to display a list of all detected drives in the system. Right-click in the left column of the inaccessible drive and click "Import Foreign Disk" to allow the system to convert the disk signature to a local disk. Check for access after the settings are saved. Click "Start" and "Control Panel" and then click "Administrative Tools" and double-click "Computer Management" to launch the utility. Click "Disk Management" to display a list of all detected drives in the system. Right-click in the right column of the inaccessible disk and choose "Change Drive Letters and Path." If no letter exists, click "Add" and assign a drive letter from the list of available letters. If a drive letter is listed, click "Change" and select a new letter to eliminate any conflicts with other devices in the system. Check for access after these settings are in place, which may require a restart of the system. Click "Start" and "Control Panel" and then click "Administrative Tools" and double-click "Computer Management" to launch the utility. Click "Disk Management" to display a list of all detected drives in the system. Right-click in the right column of the inaccessible disk and choose "New Simple Volume" to create a partition and format it for use. Click "Next" when the New Simple Volume Wizard appears. Click "Next" to accept the maximum for the drive. Click "Next" to accept the suggested drive letter assignment. Click "Next" to format the volume with the suggested defaults or change them if desired. Click "Finish" to format the drive and make it accessible to the operating system. Restore a Drive That Is Not Accessible b> Microsoft Windows operating systems support a large number of file system formats including FAT12, FAT16, FAT32 and NTFS. Hard drives are typically formatted with either FAT32 or NTFS, both of which can be used for years without issues. Damage can occur to the file system through a sudden power outage, malicious software or lack of maintenance, rendering the drive unreadable or inaccessible. Run the Chkdsk utility in Windows to resolve file system corruption and restore access to the hard drive.

Select the "Start" or "Globe" button and then click "Programs." Click "Accessories" and then right-click the command line icon in the menu that appears. Click "Run as Administrator" in the drop down menu that appears. The command prompt will display. Enter "chkdsk C: /F" substituting the "C:" with the letter assigned to the drive that cannot be accessed, and then tap the "Enter" key. Enter "Y" and tap the "Enter" key if a message appears that states "Would you like to schedule this volume to be checked the next time the system restarts? (Y/N)." Let the disk scan run and fix the drive, or if the scan does not start, reboot and let the scan run and repair the drive.
http://technet.microsoft.com/en-us/library/cc730714%28WS.10%29.aspx

Try it on other Port or try plugging it on other computer.
if its corrupted there's a way of retrieving the files. using a recovery software :).
you can use Seagate File recovery software. it will work on other devices .

click start control panel administrive tools computer management disk management right click on your drive select properties click tools you should see click check now click start tick in two boxes automatically fix files and scan for and attempt recovery of bad sectors place then a tick in both boxes then select check now start or you might tick one box then return after its finished the first repair then return and tick the second box then wait for that to finish this might schedule to start on restart of your computer
if there is an operating system on this hard drive you sould not do anything while the chkdsk utility is in progress any input might damage your computer
hope this helps

you could run the check disk utility
click start run type cmd then type chkdsk/r/f which will scan for and attempt to repair any bad sectors and automatically fix any corrupt files on your hard drive then defragment your hard drive or
control panel administrive tools,computer management ,disk management right click on your drive select properties click tools you should see click check now click start two boxes automatically fix files and scan for and attempt recovery of bad sectors place then a tick in both boxes then select check now,start should schedule this task when restart
hope this helps

1. Right click on My Computer and choose Manage.

2. Navigate to Disk Management and check to see if the drive is appearing as a drive.

3. If it is showing as unallocated, right-click on it and Partition the drive.

4. If it is showing as formatted and healthy, right-click on it, choose 'change Drive Letter and Path' to assign a drive letter.

when your external drive does not appear in "my computer" or not recognized in windows vista or windows 7, then just right click on my computer, click on manage, the go to disk management. Find your external drive there and right click on it, then select assign new drive letter. Select a letter from the midlle of the alphabet like m, then enter. The icon of your external drive should appear inside my computer

Have you "Formatted" it before you used it, If NOT, Right Click on drive and select "Format" format NTFS. After this you should be able to use the drive as normal. Also Right Click, MY Computer, choose "Manage" when it comes up select Disk Management, and you can initialise it and format there.

connect it and do the following>
1. right click it properties and the tools and the disk check....it will remove the bad sectors it may be having.
2. if then also it doesnt work luk out for a formatting in fat 32 mode,.
cheerss...pls rate...

Dear,
Data can be recover but the drive must be accessible by OS. As you write windows vista says drive is not accessible and that the disk structure is corrupted and unreadable.Do one thing try the same drive at another PC. If it run on that PC copy the data to that PC. Now format the drive and paste the same data back to your drive. But, if same thing happend then there are chances of fault in the driveand for this you shuld visit to the service cetre but, they are not responsible for the data.

Thanks & regards,
Rakesh Kumar

You most likely need to delete the partition on your external hard drive, then create a new one and format it again. You will lose the data on your external hard drive.
1. Go to the Control Panel, click on Administrative Tools, click on Computer Management, then Disk Management. (You will need Administrators rights to carry out the following tasks)
2. On the lower Right Panel select the External drive, this will be displayed as Disk 1, Right click on this drive (MAKE SURE YOU DON"T SELECT THE C: DRIVE which will be displayed as Disk 0)
and then Delete the partition.
3. This drive should then be Unallocated, Right Click on this drive and create a New Partition.
4. Then select Primary partition.
5. Check that the maxium disk size matches close to 240000(MB) you about 10+MB in the formating process
6. Click Assign the following drive letter (let the computer select this.
7. Chick Format the partition with the following settings
File System = NTFS
Allocatin unir size = Default
Volume label = "name of your choice eg. BACHUP DATA"
DON'T TICK Perform a quick format & Enable file & folder compression
8. Click Finish