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Windows 7: Internal drive disappears when trying to copy LOTS of files TO it

12 Dec 2014   #11
DavidE

Multi-Boot W7_Pro_x64 W8.1_Pro_x64 W10_Pro_x64
 
 

I feel your pain on this one.
The suggestions of things to try are all over the place, with no common solution.

Have to wonder if it isn't some type of Motherboard issue, but I have no idea how to test that.

What you could consider is:
Create a System Backup Image (hopefully you can do that).
Do a Clean Install of Windows and see if that fixes the problem.
If you're interested, here's a tutorial by gregrocker with everything needed:
Clean Reinstall - Factory OEM Windows 7


My System SpecsSystem Spec
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12 Dec 2014   #12
profdlp

Main - Windows 7 Pro SP1 64-Bit; 2nd - Windows Server 2008 R2
 
 

Oops - sorry I missed your mentioning the drive tests.

Have you tried closing all non-essential services and programs? Perhaps one of them is causing a conflict somewhere.
My System SpecsSystem Spec
12 Dec 2014   #13
TheAncient

Windows 7 Ultimate x64
 
 

@DavidE: I do nightly backups of the system drive and the data drive to NAS which has no problems. If I absolutely HAVE to re-install, I will likely go straight to Win 8.1 if the board allows that. I do have 2 system drives on SSDs: One is the "regular" "C" drive and a second SSD drive is reserved for trouble-shooting and "playing" with things. (Of course you have to explicitly boot into the drive (F8) or change the boot sequence in the BIOS) It should be very easy for me to load a fresh operating system on the secondary boot drive and try things out from there. Loading a system from scratch is a rather time consuming effort, though. It's scary how much stuff you accumulate over the years: According to SUMo, I currently have 159 programs installed - and,of course, nobody takes the time to document each and every settings change they make. As for motherboard problems: Yes, that's a possibility but just like you, I have no clue how to test that.
My System SpecsSystem Spec
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12 Dec 2014   #14
TheAncient

Windows 7 Ultimate x64
 
 

@profdlp: Tried the easy stuff (besides, one would think there would be an entry in the event log if there was a conflict). What I have NOT tried so far is, to shut down things like the Comodo firewall and/or Microfluff's anti-virus program. To test if any of those are causing trouble, I, of course, have to disconnect from the internet. I have to confess though, that I have never heard of any software conflict causing trouble copying large files to different drives. There is one exception: If I had multiple AV programs set to do 'real-time' virus checking, they could well clobber each other. I am reasonably sure this is not happening on my machine - although Comodo has a habit of trying their very best to sneak in their AV components even if all you want is their firewall.
My System SpecsSystem Spec
12 Dec 2014   #15
DavidE

Multi-Boot W7_Pro_x64 W8.1_Pro_x64 W10_Pro_x64
 
 

Quote   Quote: Originally Posted by TheAncient View Post
If I absolutely HAVE to re-install, I will likely go straight to Win 8.1 if the board allows that. I do have 2 system drives on SSDs: One is the "regular" "C" drive and a second SSD drive is reserved for trouble-shooting and "playing" with things. (Of course you have to explicitly boot into the drive (F8) or change the boot sequence in the BIOS)
Are you saying you have another OS installed now on your second SSD?
If you do, boot that up and see if you have this issue.

If not and you do want to test a clean install, I would not spend any time loading all your programs and making configuration tweeks, etc.
Just Install the OS, install MSE, and test your copy to see if it fails or not.
If it works that way, then you decide if you want to spend the time setting up the new OS, or continue trying to find the cause with your current OS.

If you do a clean install and you're interested in 8.1, you can get a free Enterprise Evaluation version that is good for 90 days.
That way you would know if everything works with 8.1.
As far as I know, you can't change the Enterprise Evaluation version to a licensed version, you would have to purchase 8.1 and clean install.
My System SpecsSystem Spec
12 Dec 2014   #16
TheAncient

Windows 7 Ultimate x64
 
 

@DavidE: I can easily restore an older backup (I think I have backups going back 3 months or so) onto the secondary boot drive and give that a shot. As for 8.1, I downloaded a full copy from MS Technet through my subscription before they pulled the plug on Technet so I'm good on that front. For now though, I have other things to do and I won't be able to work on this problem until Monday.
My System SpecsSystem Spec
16 Dec 2014   #17
TheAncient

Windows 7 Ultimate x64
 
 

Update:
I re-loaded the oldest Full backup of my system drive (Jan03, 2014) onto my secondary boot SSD and tried to create a large file (Acronis image) from there. The target drive disconnected again. Since I definitely did NOT have this problem at the beginning of the year, this effectively proves that my problem is not caused by any software, including drivers or any settings in Windows. I downloaded and ran the latest version of memtest86+ to rule out any memory problems: that wasn't it either.
I downloaded and ran SpeedFan which, among other things, lists voltages. Since those where pretty close the "nominal" voltages, the power supply is probably ok as well. (That's a wild guess only. Just looking at a one-time measurement certainly doesn't qualify as proper trouble-shooting but I do not have the knowledge or the equipment to find out more)

I have now ruled out pretty much everything. The only suspects left are the CPU (highly unlikely) and the motherboard. Both of those suspects will require buying replacements as I have no way of testing them.
I am marking this thread "closed" since there really isn't anything else that can be done and I will start shopping for a new motherboard. Thanks to everyone for your help and for pointing out different avenues to explore during the trouble-shooting process.
My System SpecsSystem Spec
16 Dec 2014   #18
DavidE

Multi-Boot W7_Pro_x64 W8.1_Pro_x64 W10_Pro_x64
 
 

Sorry to hear that
The only other thing I can think of is, if there is a reliable PC repair shop in your area, talk to them and describe your problem.
Maybe they have some type of test equipment that can verify if it is or is not a MB issue.
You would have to make sure the cost of them testing it is less than the cost of a new MB or it wouldn't be worth it.

Best of luck!
My System SpecsSystem Spec
17 Dec 2014   #19
CKWD

Windows 7 Home Premium x64
 
 

I am sorry to hear that too! I hope you manage to identify the problem quickly and that it wouldn't be something hard to handle!

Good luck!

CK_WD
My System SpecsSystem Spec
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 Internal drive disappears when trying to copy LOTS of files TO it




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