About verify files

[Alexa33323u]

Hello, I want to ask, when I copy or move files with Total Commander, it is there an option to check, Verifiy. What method is defaut for Verify? And how to change it? I guess I can chouse between maybe MD5 and others? And which one is better? Thanks

[Dalai]

It's described in the TC help. Press F1 in the copy/move dialog (F5/F6), then in the help click on "F5 Copy" and look for the section about verification. It reads

With the option Verify enabled, Total Commander reads the copied file again after copying finishes, and compares its BLAKE3 checksum (if available, otherwise MD5) with the original. The disk cache will be bypassed.

To my knowledge it's not possible to customize the hash type, but it's not really necessary to change it anyway.

[Alexa33323u]

Hello, I press f1, but nothing happend, I have last version of Total Commander

[Dalai]

Pressing F5 opens the copy/move dialog. Pressing F1 with that dialog showing opens the TC help with the page "File operations".

If the TC help doesn't open at all, it's possible that the help file totalcmd.chm is not present on your system, although I can't imagine how that could've happened. If it's missing, you can extract it from the TC installer. Press Ctrl+PageDown on the TC setup file, e.g. tcmd1151x32.exe, press Ctrl+PageDown again (or Enter) on install.cab, then go to the "e" directory and copy/extract the file totalcmd.chm to your TC installation directory. The full source file path is <TC_setup_executable>/install.cab/e/totalcmd.chm.

[Alexa33323u]

f5 it works, but f1 no. I will try your directions, to see if I can make it work

[Alexa33323u]

I dont know how to do that. I install it in program files, there in install folders are no file named install.cab

[Dalai]

As I've written already, the install.cab is contained in the TC installer/setup executable.

[Alexa33323u]

Okay, I download it again, double click to install and ask me if I want to update or install

[Dalai]

Yes, reinstalling or updating TC could also work. I suggested the manual way because I don't know how the help file could be missing in the first place, and extracting it would work for sure.

[Alexa33323u]

But where to find install.cab?

[Alexa33323u]

Okay, got f1, then I check f5 and got your message "With the option Verify enabled, Total Commander reads the copied file again after copying finishes, and compares its BLAKE3 checksum (if available, otherwise MD5) with the original. The disk cache will be bypassed" So, how to check which method is selected? Blake or Md5? Where can I find this option to change?

[Dalai]

So, how to check which method is selected? Blake or Md5? Where can I find this option to change?

As I've said in the beginning, there is no option to change the hash type. TC should use Blake3 if the appropriate DLL file (blakex32.dll or blakex64.dll) is present and TC is used on XP or later. The history.txt says:

12.04.22 Release Total Commander 10.50 beta 1
[...]
11.04.22 Added: Show error when trying to check a BLAKE3 checksum and the dll cannot be loaded, e.g. on Windows versions before Windows XP, or when the dll isn't found (32/64)

I'm not sure whether or not a special CPU instruction set is required but I doubt it. The only way to know is to measure the time required to verify the files. As far as I'm aware, Blake3 is much faster than any other hash type supported by TC. In the end, it's not really important which hash type is used. What matters is that the verification is done properly. Both hash types can achieve that. And even though MD5 has been discredited for years now, it's still fine to be used as a checksum algorithm in the field we're talking about.

[Alexa33323u]

And about total commander copy long path files? How to do that, move or copy files and folders without error or interupts for this specifical type of files and folders with long path name/ or to many characters?

[Dalai]

Copying long paths has been discussed many times already. Search for LongNameCopy in the forum and the TC help.

[Alexa33323u]

Can you tell me where to look and find that topic? Thanks