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Windows 7: Drive G: intermittently disappears

05 Apr 2014   #21
Microsoft MVP

Windows 7 Ultimate X64 SP1

The drive with the active OS on it needs to be plugged into SATA_0 or SATA_1, whichever your board has. They should also be set to AHCI mode in your BIOS.

My System SpecsSystem Spec
05 Apr 2014   #22

Windows 7 Home Premium 32 bit

OK, you must have gone to sleep.

When you wake up, apart from answering the query in my previous post #20, you neeed to give the following information.

1. Please confirm that all the drives shown in your last screenshot (in post#19) are internal drives and there is no external drive connected to any USB port.. ( If you keep connecting external drives and post screenshots with it, I may have to give up in frustration.)

2. Now you have two 4TB drives E and F and three 2TB drives G,H and I. According to your problem posted one 2TB drive was going on and off. Is it still behaving like that or is your problem resolved?

3. If it is still behaving erratically, which one is it? Is it G or H or I?

4. Leave only that problem drive connected, disconnect all other secondary drives - except the system drive - and post a screenshot of Windows Disk Management and also My Computer. ( And again no external drives)

We shall investigate the extra Ghost CDROM drive as we go further.( As for Disk numbering that is not a serious problem and so we shall put it in the backburner till Britton30 comes on it.)

And a final but none the less important query.:)

Was any of the drive taken out off any external drive casing and connected as an internal drive? If yes which one is it? ( Normally a WD external HDD with Smartware backup software on it can create a virtual CD)

I am also taking a break and see you after you wake up from your deep slumber.:)
My System SpecsSystem Spec
06 Apr 2014   #23

Microsoft Community Contributor Award Recipient

Windows 7 64 Bit Home Premium SP1

It is very hard to tell, sxcd1, if you are following the instructions and what you have done. You need to respond to our inquiries with direct answers to get the best help.

I notice you still have not removed the Active flag from Disk 0 - the 2TBWD, Drive (I).
My System SpecsSystem Spec

06 Apr 2014   #24

Windows 7 Pro 64Bit

Quote   Quote: Originally Posted by jumanji View Post
OK, I have noted.

Do you have any programs like Daemon Tools, Alcohol and the like which create a virtual CD rom drive?

If so get into the settings and disable creation of virtual CDROM drives.
That was it so all is well at this point. Will see if any problems occur going foward. Thanks for the help and explanations.
My System SpecsSystem Spec
06 Apr 2014   #25

Windows 7 Home Premium 32 bit

That is good to know.

So, I take it that doing a drive clean up and releasing the drive letters and registry entries pertaining to the non-present drives, has resolved the problem of that one drive going intermittent.

I was really perturbed with that one CDROM drive that stole one drive letter that prevented you from assigning sequential drive letters to the internal HDD drives. Knowing fully well that it could come either from a virtual drive software and worse still from a WD external HDD with Smartware ( that cannot by any normal means be done away with) made me anxious. Reason why I was harsh about connecting an external drive while you are in the process of cleanup.:)

Ok now that you have conceded that it was indeed coming from a virtual drive software, here is how to give it a permanent drive letter.

Enable your virtual CDROM drive.

Mount an ISO on it.

Now go to Disk Management. You can see your Virtual drive with the automatically assigned drive letter.

Change the drive letter to one of the last few alphaphets. ( I had given it the drive letter X with the physical drives given Y and Z as in post #.18. Without anything mounted on it, the VCD will not show up in Windows Disk Management and so you cannot assign a specific drive letter to it.)

Drive G: intermittently disappears-06-04-2014-19-40-47.jpg

If you are plugging in and plugging out innumerable external drives and frequently - which seems to be true in your case - sooner or later you will again get into the problem of some drives not showing up due to drive letter confusion. So perform the drive Clean up periodically to flush out the non-present devices locking the drive letters in the registry.

As for as rearranging the disk numbers like Disk 0 , disk 1 etc.,, I really do not know whether it really matters, though it will look nice that way. I shall as I said earlier leave it to Britton30 to elaborate and guide you on it. ( I am not plain competent :))

Whether you should remove the active flags in non-system drives? As I said in post #8, theoretically as long as you are booting right it should be OK. But we always want to remain safe. Isn't it? From a practical standpoint, if you are not a multi OS operator as TVeblen pointed out and know your way, it is safer that you remove it from non-system drives.

If your problems have really been resolved, you may mark this thread as solved that would benefit others.

Have a nice day.

My System SpecsSystem Spec
06 Apr 2014   #26

Windows 7 Pro 64Bit

Drive G disappeared while using the computer after I installed the USB HDDs and memory card reader. My best guess is it's the Samsung USB 3 drive connected to the Orico PCI card. So I disconnected it and rebooted drive

Attached Thumbnails
Drive G: intermittently disappears-dm-no-xa.jpg   Drive G: intermittently disappears-dm-no-xb.jpg  
My System SpecsSystem Spec
06 Apr 2014   #27

Windows 7 Home Premium 32 bit

Ok. Check if after plugging out the SAMSUNG USB3 drive the G drive does not disappear.( Monitor for a long time)

Also check what happens when you connect the Samsung drive to one of the USB2 ports on your computer.

Honestly, I couldn't reason out a connection between the Samsung external drive and one particular WD internal drive out of so many..

EDIT: In view of the unpredictable behaviour of drive G , I would advise that you forthwith backup all contents in it to another drive. If it is not the power cable/data cable or port fault which you can easily check by interchanging, some component in the G drive may be failing intermittently now, but can fail totally anytime. That's what I can intuitively reason.
My System SpecsSystem Spec
06 Apr 2014   #28

Windows 7 Pro 64Bit

I did run the WD Data Lifeguard Diagnostics on Drive G: short and long and it passed.
My System SpecsSystem Spec
06 Apr 2014   #29

Windows 7 Home Premium 32 bit

:) OK. Now do this:

In the current positions, determine from Windows Disk Management which drive disappears when the Samsung USB 3 external drive is connected to the add-on card port. Is it 2TBWD2 or WD 1Gig SAT? (both are 2TB non-active drives)

Interchange 2TBWD2 and WD 1Gig SAT. Connect your Samsung External to USB3 port on the add-on card as before. Now determine from Windows Disk Management which drive disappears. Is it 2TBWD2 or WD 1Gig SAT?

If it is the same drive label that disappears, back it up ASAP.

I am retiring for the day.
My System SpecsSystem Spec
06 Apr 2014   #30

Windows 7 Home Premium x64

.... i suggest u should take the whole PC to a WD reseller or retailer or where u bought the HDD to test for any problems
My System SpecsSystem Spec

 Drive G: intermittently disappears

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