SimpleTech 1TB External HD Formatting Help

I bought a brand new 1 TB hard drive and i clicked the "Get Started for Mac" and tried formatting for Mac and PC. It showed me to go to the disc utilities app. I clicked erase>MS-Dos> and hit erase. I get the "Disk Erase Failed: Could not unmount disk." I also tried to format it for just mac, (Mac OS Extended (journaled)) but it didn't work either and i received the same message.

What do i do?

MacBook Pro, Mac OS X (10.5.5)

Posted on Jun 15, 2009 5:58 PM

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11 replies

Jun 16, 2009 5:16 AM in response to Si_ege

Siege-A wrote:
... i clicked the "Get Started for Mac" and tried formatting for Mac and PC.


What exactly did you click to see this getting started information? If it was a document found on the drive, then the drive can't be unmounted until the document is closed, & possibly until the application displaying it is quit.

Also, when you follow the instructions & click once on the line with the size (in GB) for the SimpleDrive in Disk Utility's list, you should see at the bottom right of the Disk Utility window a line that tells you the "Partition Map Scheme." What is it?

Jun 16, 2009 5:47 AM in response to Si_ege

Was the "Getting started " document pre-loaded on the hard drive? or did it come with a CD-ROM.

If disk utility can't unmount the drive, it is most likely because there is something on the drive that is still open.. Such as the document you are referring to.

Close the document, if there is a Volume on the desktop for this drive already, drag it to the trash and unmout it before lauching Disk Utility.

You can also unmout the drive manually in Disk Utility by clicking on the volume icon underneath the Device icon and clicking UNMOUNT.

That should allow you to click on the device icon, and then ERASE it.

Hope this helps.

Brent

Jun 21, 2009 5:08 AM in response to bphendri

Here is how you have to proceed with this drive.

• Plug the drive in
• Open Disk Utility and select the drive (not the partition)
• On the left side of the screen you will will see "First Aid, Erase, Partition, RAID & Restore"
• Click Partition
• Under Volume Scheme select the drop down box and select 1 partition (assuming you only want the computer to see the drive as one large drive).
• Click "Options..." below the white box and change the selection from "Master Boot Record" to "GUID Partition Table".
• Click Apply and you will be done.

This is the process for formatting ANY Hard Drive that comes as a windows NTFS system. The reason it would error on you is because you were trying to change the format of the partition while leaving the drive as a Windows drive

I work for Best Buy and see people come in weekly with this issue on all brands of Hard Drives. I personally just purchased this same drive and yesterday formatted it (as instructed above) and it is preforming perfectly.

*Rick Mead*
Rick Mead Photography
Web Page: www.rickmead.com
Blog: photoviewfinder.blogspot.com

Message was edited by: Rick Mead

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SimpleTech 1TB External HD Formatting Help

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