Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: Windows 7 drops drive letters on reboot - simple solution

22 Apr 2013   #1

Windows 7 Professional
Windows 7 drops drive letters on reboot - simple solution

I've been researching this problem for 3 days now and found a simple solution that worked for me - and which I couldn't find on the web, although there are many people with this problem.

Problem: I instaledl Windows 7, attached drive letter to a partition (in a RAID in my case, but I don't think that matters) - Drive letter was lost on reboot, but could be reattached using "Control Panel - System and Security - Administrative Tools - Create and format hard disk partitions". Lost again on reboot.

Cause: I don't know why, but for some reason both my RAID volumes (which I set up during install and gave drive letters to in control panel) had the 'hidden' attribute set. This appears to have prevented them being assigned drive letters on boot. I don't know how to fix (or find) this in control panel, so I used DISKPART as follows:

Solution: In command prompt window, run DISKPART. You can type help to learn how to use it, but the following is what I did:
- type "list volume" to identify volume number (n) of partition
- type "select volume = n" (you are now opoerating on volume number n)
- type "attributes volume" This will show you attributes. Look at Hidden - if it shows 'yes' you have the same problem I had.
- type "attributes volume clear hidden"
- type "attributes volume" again to confirm this worked.
You can repeat this for other volumes (I had to).

Note: I found that assigning drive letters in diskpart didn't work well (some were unavailable) so I rebooted and then used Control Panel to set them.

Now they are permanent through reboots!!

My System SpecsSystem Spec


 Windows 7 drops drive letters on reboot - simple solution

Thread Tools

Similar help and support threads for2: Windows 7 drops drive letters on reboot - simple solution
Thread Forum
Solved One possible solution to running out of drive letters. Network & Sharing
Solved Why would Windows 7 assign drive letters oddly on an internal drive? General Discussion
Solved Help with changing drive letters in Windows 7 General Discussion
Windows Explorer: Display Drive Letters Before Drive Names General Discussion
Drive letters get swapped in windows 7?! Hardware & Devices
dvd to h.246 The simple solution, and free. Music, Pictures & Video
Possible solution to network card drops Network & Sharing

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 04:18 AM.
Twitter Facebook Google+

Windows 7 Forums

Seven Forums Android App Seven Forums IOS App

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33