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2 external drives of the same size to a Windows 7 or Windows 8 PC

2 external drives of the same size to a Windows 7 or Windows 8 PC

Only one drive is seen when connecting two WD external drives of the same size to a Windows 7 or Windows 8 PC
http://wdc.custhelp.com/app/answers/detail/a_id/6571/session/L3RpbWUvMTQwNTU0ODQ5NS9zaWQvQU5TUVVzWmw%3D#

Problem:
When connecting two WD external hard drives of the same capacity to a computer running Windows 7 or Windows 8, only one of the drives can be accessed. When each drive is connected separately, they can be accessed, but only the first drive plugged in to the computer will be visible when both drives are plugged in.

Cause:
This issue is caused by the two drives having identical signatures, leading to a Signature Collision. This is different from the drive's serial number, which is always unique.

Solution:
1.Connect each drive (one at a time) and create a backup of any data you may already have stored on the device.
2.Connect both drives to the computer.
3.Open the Start Menu, type diskmgmt.msc and press Enter.
4.On the lower part of the Disk Management window, look for a disk which is listed as Offline.

5.Verify that you have a Signature Collision by holding your mouse over the drive. You will receive a pop-up explaining why the drive is offline.
6.Right click on the disk in the area that says Offline, and select Online
7.The drive will be given a new signature. A new Drive Letter should appear and you should now be able to access the drive.

[ 本帖最後由 蘇格拉底 於 2014-7-17 17:58 編輯 ]
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蘇格拉底

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2 same hard drive at the same time!
小露寶

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