Can chkdsk delete my files? (bad file attribute, deleting)

[Achint2000]

A long story... all is important.

I had Windows 7 on a 256GB MBR SSD, tried to convert to GPT using gptgen as I wanted to install win10 clean but Windows10 clean install from boot doesnt install on MBR.

After gptgen completed, a BSOD came, my win7 stopped booting.

Trying to recover, accidentally executed "clean" in DISKPART. Entire drive was unallocated.

Used EaseUS Partition Recovery (Boot version) to recover but it was recovered as MBR disk, with the previous 2 partitions, and the empty partition recognized as a logical disk.

My Windows 7 booted successfully after that as I used bcdedit /fixmbr /fixboot /scanos /rebuildbcd randomly many many times and finally went to "repair your computer" from the setup disk and for the first time in past 18 failed boots of the same Windows 7 since past 7 years, it magically saw an error, fixed it automatically, renaming it "Windows 7 Ultimate (recovered)".

Then, installed another copy of the same Win7 from the same setup CD to the other partition of the same SSD and upgraded it to Windows 10 Pro x64. Everything worked perfectly fine and normal.

Ended up with a successful Windows 7 and Windows 10 Dual Boot on the same SSD. (yay)

Had another copy of the same Win7 in a different 1TB HDD which also failed to boot after a complete hardware change but it had too many memories so I left it alone. I tried to boot that, thinking all those bcd repair commands must've fixed it, but it didn't boot and it also deactivated my current Win7's license key.

Now the 2nd partition I created was just 46 GB and I have space issues on Windows 10 so today I tried to shrink the win7 partition and it said something like the drive appears to be corrupt, and chkdsk will run, dont remember exactly.

Restarted,
chkdsk started,
scanned the first normal Win7 partition and all worked fine.

Restarted again, started scanning the 2nd partition and even before 5% completion, kept saying bad file attribute, deleting ... something ... (80, "") repeatedly in a long high speed row. Then a random power cut came, my PC isn't connected to my UPS for now so it shut down and after power came back, restarted to Windows 10 and it also had scheduled a chkdsk. Skipped it, went to see if all's ok and saw 1.9GB more free space on my Windows10 drive. Im not sure if it was some temp files or data is actually missing but I wanted to be sure.

Can chkdsk in any possible way delete stuff from my drives in this case?

What's wrong with my SSD that chkdsk is detecting? I can still use Windows 7 search (win10 search is crap), copy large files, play games, defrag it, etc. Nothing seems wrong...

What should I do?

 

[USAFRet]

The problem stems from this:

accidentally executed "clean" in DISKPART. Entire drive was unallocated.

Everything after that is simply putting layers of bandaids on a sucking chest wound.

Bite the bullet, cut your losses.
Wipe and reinstall from fresh.
Or...go back to the full drive image you made before you started messing with the partitions.

 

[Achint2000]

I have a total of 5 TB storage which in past 7 years is all full and I don't really make any backups at all. Everything's working perfectly fine on both partitions, im using them both on a daily basis of copying and moving files, indexing files on both Win7 and Win10, defragging the drives, etc...

I went through a hard time recovering my data and I had my share of not-booting issues with Windows. I'd rather not care reinstalling xD

My question still remains, can chkdsk delete stuff from my drive or mess with the installed OS? And if so, how do I cancel a scheduled chkdsk? (If someday my PC restarts and I forget to cancel it, wont wana lose any data)

 

[USAFRet]

Done incorrectly, chkdsk can absolutely screw with the OS, and any other files on the system.

And I hope you're not actually telling us that you have several years of stuff, on a single 5TB drive, with no backups.
That is a single failed drive or major virus away from losing it all, no matter what you do.

 

[Achint2000]

All 1 TB separate drives with 2 Internal, 3 External and one of the drives having every single setup I need to set up a new OS and then a 256 GB SSD.
And I cant have anything to do with chkdsk. It schedules and scans and fixes, no options for me.

So how do I permanently cancel or remove chkdsk? I dont want any more problems with this ... xD

 

[USAFRet]

The OS seems to think something is wrong with one of those drives.
Discover which one, move everything off it, and either fix or replace.

Just stopping chkdsk from running does not mean the problem, if there is one, is actually fixed.

 

[Achint2000]

It's the 2nd partition of my internal SSD on which I have Windows 10 installed. I don't even care if some error shows up, I'll set it up all again then, takes just a day. But I wana keep using it as long as it works. I practically have no important data on it, just my current working OS.

Screenshot after scanning the error-found partition with Defraggler: http://imgur.com/c1ZyWzH
Screenshot of disk management (SSD is disk 0, error partition is the right one, with a green border) : http://imgur.com/nI3HzLa

Everything is working absolutely fine...

 

[USAFRet]

1. Defraggler on an SSD? No.

2. This would seem to be a simple file corruption, not a failing drive.

 

[Achint2000]

I had to properly defrag my SSD to shrink the primary partition and create a secondary one. Then I can atleast scan the drive and see if it's working. No file is corrupted, I've tested every single program I have.

A GPT Partition is like this:

Now, when it was recovered AS an MBR, with Partition Information and Information 1,2, the secondary GPT header had 3 partitions created by Windows 10, all empty, which got disappeared into the logical disk partition. So, those partitions disappeared and the current partition information or something is not complete but it works.

And the MBR partition looks like this:

So overall, I think that when it was recovered as an MBR, the GPT information disappeared from below and nothing is really corrupted but file attributes or some information might be incomplete or corrupted, which is bugging chkdsk.

 

[Achint2000]

Anyway I already got my answer, so thanks, I'll just terminate chkdsk from both my OS'es

Done incorrectly, chkdsk can absolutely screw with the OS, and any other files on the system.

 

[Achint2000]

Another update: 2 months back from this date, power got cut off while booting Windows 10 on that partition. I was testing an old game, so until a week ago, I always booted into Windows 7. Now 2 days ago, I wanted to see 'sup with Win10 and it launched startup repair, ran chkdsk and deleted 40 GB out of 46 GB from my Windows 10 partition and completely ruined itself. I lost 2 TV series, my Windows 10 and about 20 GB of mobile videos with friends and stuff, and couldn't recover them as the file names are still there but their sizes are all 0 bytes.

Ended up removing and formatting the partition, then deleting the volume into unallocated space. :\
Worst part - Windows 10 didn't even prompt weather to start normally or launch repair...