Copy with verify feedback

[melgrubb]

I am rebuilding a RAID array, and it has a LOT of stuff on it. I'm recycling my old drives from a 2-bay RAID doing simple mirroring to a 4-bay RAID enclosure, so I want to make VERY sure that all of my stuff has been properly copied to an external drive before nuking the pair of drives it's currently on to build the new RAID.

I used FFS to do the copy, and set the verify option in the globalsettings before I started, but when it was done, there was no way to tell that it had actually done anything. I can't tell if it was happy with the results or not because there was nothing in the UI to say that the files had been verified. A simple "50,000 Files Copied and verified" type message would let me know that it had verified the results.

I'm currently letting FFS do a file content comparison between the source and destination, but apart from the progress bars, I also have no idea whether it's already found something. Maybe no news is good news, and the screen would be filling up with entries if anything had been found wrong. I just don't know what I should be looking for. I think perhaps a slight change in messaging would let the user know that everything is going okay.

The progress bars for the verify operation are telling me how far along the process it is, but not what I really want to know. "12345 of 50000 files verified, 0 differences found". Since this operation is still expected to take another 12 hours at this point, I'd like to know early on whether to just pull the plug and start over or not. If, at this point, I had 10 out of 50,000 files that don't match, then things are going great, and I'll re-copy those files individually. If, on the other hand, the stats are more like 5000 errors out of 50000 files, then I'd know that something went horribly wrong during the copy, and that I should try again.

[therube]

Why not start small, say, 3 files.
Sync them.
Manually change one of them.
Then run your comparison & see what kind of feedback you get?

[Zenju]

After each file copy you should have seen a short status message "verifying file...". Additionally you can check the info messages after sync where you find "Verify copied files: Enabled".