Checking file integrity after copying using Teracopy
Checking file integrity after copying using Teracopy
Hi all! I've been transferring a bunch of stuff from my portable harddrives to my synology. After transferring using Synology's file transfer and connecting the harddrive directly, I've completed a handful. I started worrying about the file integrity of these transfers since synology really doesn't tell you what files failed and etc. So I started using Teracopy to transfer all the files instead. Can I use Teracopy to verify files that are already transferred that didn't use Teracopy?
Like plug harddrive into PC, and then "Source F:\" and "Target Nas location" and click verify. Does that work... sorry very new to data hoarding. Thanks in advanced
If you have set Teracopy to verify upon moving and copying, original and copy should be identical. You can automatically save the checksums for re-verification later on.
Transferring (moving) or copying?
It's better to copy, so you retain your original as a "backup," in case something goes wrong at some later time. Then you can always re-check integrity in the future.
I use Beyond Compare on whole drives/volumes to compare/verify integrity and re-synchronize/update from time to time.
copying, but that’s the thing. These files were already copied using windows file explorer. I was wondering if Teracopy can verify the file integrity between the original and the new location
I don't think Teracopy can compare files.
Beyond Compare does, it's a wonderful tool for comparing files, directories, even whole drives, and is darn fast at it. It has a very good (graphical) interface too.
You can use other programs (many are free) to generate hash values of files. Then you can compare the results side by side. This can be done manually or even semi-automatically, using a script.
I sometimes use MultiPar (it's free) to create some redundancy (protection) blocks, to repair files or folders that got broken/corrupted.
In Teracopy, choose your files, Test and save a HASH. You'll need a program like MD5Checker to compare the HASH.
I like ViceVersa for comparing drives/directories. The free version should be fine unless you have non-English file names. https://www.tgrmn.com/free/
I’ll take a look! Thanks
I started worrying about the file integrity of these transfers since synology really doesn't tell you what files failed and etc.
I am sure any failed write or read operation on the NAS will be presented to the OS mounting that network drive, and then to the application doing the copy or whatever other operation.
Can I use Teracopy to verify files that are already transferred that didn't use Teracopy?
Not sure if this file manager has a "compare" feature (I guess it should?) but Far Manager (free and open source) for example does it with F11/Advanced Compare/select also "contents", maybe also "Display a message if no differences were found" and let it run (it takes of course longer than just checking date and/or size).