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Windows 7: chkdsk, does it check empty sectors ?

20 Mar 2016   #1

XP Pro (x86) | 7 HP (x86) & (x64) | 7 Pro (x64)
chkdsk, does it check empty sectors ?

Does ChkDsk check empty sectors?
I have run ChkDsk to "check only" a brand new (unused) 2TB HDD.
The scan was all over within <5 seconds.
Does ChkDsk only check occupied sectors ... files/folders ... or does it check all sectors ?

C:\Windows\System32>chkdsk D:
The type of the file system is NTFS.
Volume label is Seagate Expansion Drive.

WARNING!  F parameter not specified.
Running CHKDSK in read-only mode.

CHKDSK is verifying files (stage 1 of 3)...
  256 file records processed.
File verification completed.
  0 large file records processed.
  0 bad file records processed.
  0 EA records processed.
  0 reparse records processed.
CHKDSK is verifying indexes (stage 2 of 3)...
  278 index entries processed.
Index verification completed.
  0 unindexed files scanned.
  0 unindexed files recovered.
CHKDSK is verifying security descriptors (stage 3 of 3)...
  256 file SDs/SIDs processed.
Security descriptor verification completed.
  11 data files processed.
Windows has checked the file system and found no problems.

1953512032 KB total disk space.
     42076 KB in 10 files.
        16 KB in 13 indexes.
         0 KB in bad sectors.
    125824 KB in use by the system.
     65536 KB occupied by the log file.
1953344116 KB available on disk.

      4096 bytes in each allocation unit.
 488378008 total allocation units on disk.
 488336029 allocation units available on disk.
Thank you :)

My System SpecsSystem Spec
20 Mar 2016   #2

Windows 7 Pro 64 bit

Run as shown chkdsk checks only the logical consistency of the file system. It does not check file data clusters or empty clusters. Doing any of that would require far longer than 5 seconds. It will do more with some of the switches but am not sure how much.
My System SpecsSystem Spec
21 Mar 2016   #3

XP Pro (x86) | 7 HP (x86) & (x64) | 7 Pro (x64)

So chkdsk only scans system sectors -- not data sectors ?
- but the D: drive is not system drive
How can chkdsk "fix" system sectors if the system is in use ?
** see my edit below

The disk I checked was/is a new empty Seagate Expansion pocket 2.5" spinner

Why I want to scan a new drive:
Two months ago I purchased an ADATA 2TB portable HDD, formatted it to NTFS (mostly to remove the "extras" on the default single partition) ... copied a bunch of MP4 movies onto the ADATA ... 60% of disc capacity ... connected the portable drive to our "smart TV" and have been watching a number of the MP4 videos for about 8 weeks.

Then wanted to copy some more MP4 videos onto the ADATA.
- WinExp recognised the ADATA drive letter but when the drive was opened WinExp locked up
- the same result on 2 other PCs
- required Task Manager to escape from WinExp
I could open the drive in Bootable MiniTools (Linux Ubuntu) and view the contents ... but I abandoned the investigation because I had a back up of the contents on the ADATA device.
I would like to do a disk integrity check of the new Seagate before loading anything onto it.

Is there an app to scan an entire drive ?
SpinRite will do it but at us$100+ [ouch!]

Just found this ancient 2008 tutorial by Brink How to Run Disk Check in Windows 7
- at a glance it looks like I have to select the target drive in "Computer" and check disc from there
- I thought by running chkdsk D: in command prompt I would get the same result
My System SpecsSystem Spec


 chkdsk, does it check empty sectors ?

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