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Windows 7: Drive D: disappears REPEATEDLY

11 Jun 2012   #1

Windows 7 Ultimate 64-bit
Drive D: disappears REPEATEDLY

I have a Sony VAIO laptop running Windows 7 Home Premium 64-bit with a single 500 GB hard drive. A year ago, when the computer was new, I used a free partition manager program (Partition Wizard maybe?) to allocate about 60 GB for drive C: which holds Windows 7 and all of my software apps. I allocated the rest of the free space to D: for all of my data files. Sony also has a 13GB recovery partition and a 100 MB System Reserved partition which preceed C: and D: on the hard drive.

Three days ago, when I booted the computer for the day, drive D: was gone. Disk Management showed free, unallocated space equal to the size of my missing drive D:. Using Sony live chat support, the technician used Disk Management to allocate the 400 GB of free space to D: and formatted the partition. I then restored my missing data from a backup.

The next day I booted my computer and drive D: was gone again. Disk Management again shows free, unallocated space equal to the size of my missing drive D:.

I have no third-party disk management software installed. Recent changes to my system include:
1) SmartSync Software recently downloaded a new version of SmartSync Pro (version 4.0) to my hard drive.
2) I ran Disk Cleanup on drive C:

Do you know what would cause drive D: to repeatedly disappear on boot up and how to fix the problem?
Thanks for your help!

My System SpecsSystem Spec
13 Jun 2012   #2

Windows 7 Ultimate 64-bit
No One Will Respond?

I searched the threads for awhile. Although there are many for "Drive D: disappears", none of them are like my situation. It appears to be unique--a first for my particular situation and symptoms.

I would really appreciate some help! If you need more information, let me know.
My System SpecsSystem Spec
13 Jun 2012   #3

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium SP1, 64-bit

Have you run the drive manufacturer's disk utility?

What does SMART report?

Have you done a system file check (sfc /scannow)?

Do you see any errors in Device Manager?

When did you last do a complete virus/malware scan?
My System SpecsSystem Spec

13 Jun 2012   #4

XP / Win7 x64 Pro

If a partition keeps disappearing, I would make sure all of the data on there was backed up and proceed to run a Disk Check on the drive. It's possible that the drive is failing, or that you've contracted some malware that is wreaking some havoc with your system.
My System SpecsSystem Spec

 Drive D: disappears REPEATEDLY

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