Hi Thomas,
- Ask are you refering to Hard drive or Network drive?
- Do you get any error message?
- From which location are you trying to open this drive?
This issue occurs because the same device instance ID is assigned to the drive when the drive is moved to a new slot. Therefore, Windows uses an incorrect interrupt line for the drive.
Method 1:
a. Restart Computer
b. Insert a drive
c. Open Computer Management
d. Go to Disk Management
e. Right Click on the Disk Currently Inserted and Change Drive Letter & Paths
f. Give the drive the first permanent letter (i.e. E, F, G, etc)
g. Now remove that drive and do the same w/ # 2.
If your drives are recognized properly by the computer, you should be able to hot swap them now and have them keep the same drive letter.
Method 2: Run the fixit
Hardware devices are not working or are not detected in Windows
http://support.microsoft.com/mats/hardware_device_problems/
For more information:
Device Manager does not display a drive after you hot-swap the drive between slots on a PCI-E switch in Windows 7 or in Windows Server 2008 R2
http://support.microsoft.com/kb/2601456?wa=wsignin1.0
Do let us know if you have any other queries pertaining to Windows in the future. We will be happy to help. We, at Microsoft strive towards excellence and provide our customers with the best support