Public bug reported:
In Ubuntu 21.10 using ntfs-3g 1:2017.3.23AR.3-3ubuntu5 I can create
sparse files which result in the following messages from Windows 10 21H2
disk scanning:
Stage 1: Examining basic file system structure ...
The allocated length 0x41000 is not in multiple of 0x10000 for attribute
of type 0x80 and instance tag 0x1.
The Windows GUI will say that the drive was scanned successfully with no
errors, and I will need to look in Event Viewer to see this in scanning
output. Repeated scans will not do anything about this issue. To fix the
issue, make a copy of the affected file in Windows and delete the
original.
Attribute of type 0x80 is the data attribute, which tells where the
file's data is stored. Apparently Windows allocates space for sparse
files in multiples of 64 KB (0x10000), and ntfs-3g does not. The message
from disk scanning in Windows fails to tell you what file is involved. I
only found the affected file after seeing that sparse files use 64 KB
chunks, and then searching the file system for sparse files.
I'm attaching a tar file created with the --sparse option. Extracting it
onto NTFS should create a sparse file which triggers this issue. I'm
testing with a partition with 4 KB clusters.
ProblemType: Bug
DistroRelease: Ubuntu 21.10
Package: ntfs-3g 1:2017.3.23AR.3-3ubuntu5
ProcVersionSignature: Ubuntu 5.13.0-25.26-generic 5.13.19
Uname: Linux 5.13.0-25-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu71
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: XFCE
Date: Mon Jan 17 17:22:47 2022
SourcePackage: ntfs-3g
UpgradeStatus: Upgraded to impish on 2021-10-02 (107 days ago)
** Affects: ntfs-3g (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug impish
** Attachment added: "tar contains sparse file which triggers bug"
https://bugs.launchpad.net/bugs/1958180/+attachment/5554993/+files/1229312_sparse_266240.tar.xz
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https://bugs.launchpad.net/bugs/1958180
Title:
"not in multiple of 0x10000" chkdsk errors for sparse files
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