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Read-Only volume is (temporarily) writeable!

Topics: Technical Issues
Jan 28, 2016 at 2:15 PM
I mounted a volume read-only.
If I try to create a file, this does not work (which is correct),
BUT:
I changed the ID3Tag of an MP3 file (no error!) and when I copied the .mp3 to the Desktop the changed Tag was also present in the Desktop file.

Remounting let me find out that the change is not written to disk - so it seems like you can edit files, this edit is written to the drive cache (no error!) and then without further notice the content of the write cache is lost?!

(Win 8.1 x64, VC 1.16)
Jan 28, 2016 at 4:20 PM
I get an error on my Windows 7 Pro 64-bit OS running 1.16 version of VeraCrypt.

Test Procedures
  1. Created a small file container of 50 MB.
  2. Mounted volume normally and copy some files into the volume.
  3. Dismounted and mount volume read-only.
  4. Opened a Windows text file, modified it and attempted to save the file in the read-only volume.
  5. I got the error: "The media is write protected."
I suspect the issue you are experiencing is with your software for changing the ID3Tag of the MP3 files and not VeraCrypt. Can you confirm my results on your Win 8.1?
Jan 28, 2016 at 5:42 PM
I expected that as well - that is why I copied the file to my Desktop. Even the md5 of the file changed.

Interestingly I cannot reproduce this now. Editing the Tag now gives an error as well. This is strange.