Verify while copy

[trob]

Is the Total Commander verifying/comparing source file to target file while copying? Or If i want to be sure about the copy is good, i have to use compare/synchronize?

[Clo]

2trob
Hello ! Welcome on board !

¤ Indeed, you can use "Compare by contents" to know if the copying has been correct.
* You also see immediatly if the size of the copy in the target-dir is identical with the original file; it's a simple first visual control.

  Kind regards,
Claude
Clo

[Sheepdog]

In addition you can use Files->Create CRC Checksums (sfv format...) and Verify CRC Checksums (from sfv files).
But as far as I know the OS-function to verify the written data is enabled.
When I use a bad floppy and try to copy files there is always a complaint that data couldn't be written.

To be sure we have to wait for a comment of @ghisler.

sheepdog

[trob]

Have You ever seen that the TC's copy was wrong?

[Sheepdog]

Have You ever seen that the TC's copy was wrong?

Not as far as I can remember. But it comes in mind to me a thread about defective data which was based on hardware faults (USB Stick; HD Prob).
So if you really want to be sure of identical data it's recommended to use CRC check.

If you copy zip archives its enough to test the copied archive (because zip himself uses CRC-check).

sheepdog

[trob]

I ask this because i want to make the copying faster than copy+synchronize, but without a mistake (a lot of file).
So if the TC is verifying, then i haven't to.

[Sheepdog]

2.560.029 bytes in 21430 files took 5 minutes 55 seconds to build a checksum file and again 9 minutes 08 sec to verify them.

Dont know if copy and synchronize is faster, but if you must be sure to have the copied without error, you should verify again.

sheepdog

[trob]

So You don't know that TC is verifying when copying or not...

Thank You very much.

[trob]

(i'm copying my winchester to another one)

[eugensyl]

(i'm copying my winchester to another one)

If you WANT to be sure closer to 100 procent you must verify with a checksum method (SFV / MD5 recommanded).
If still use removable storage medium try remove and attach them again before verifing checksum. Otherwise verify is in RAM !

Best wish,
Eugen

[bobputnam]

If I'm mirroring complete directories or drives, I'll set the archive attributes on and use xcopy with /v /m. If the copy gets interrupted, it will skip those files already copied. The command line still rules for some things. ;>)

[Hacker]

trob,
TC does not verify files while copying, AFAIK. I think at least one of these tools do, though - http://clubtotal.free.fr/ - Tools - and there look for filecopy and slowcopy.

HTH
Roman