On Sun, Jun 28, 2015 at 4:27 PM, Chris Bennett <chrisbenn...@bennettconstruction.us> wrote: > On Mon, Jun 29, 2015 at 12:56:04AM +0200, nerv wrote: >> On Sun, 28 Jun 2015 17:39:18 -0500 >> Chris Bennett <chrisbenn...@bennettconstruction.us> wrote: >> >> > I had 4 different hardrives that were failing. >> > I bought a 2TB usb drive to back up all the home folders. >> > >> > I now would like to cp all of the folders and files to another empty >> > partition. >> > >> > But I don't want to overwrite any files with same name but different >> > content. >> > >> > For example: >> > >> > /homeX/index.html to /homePerfect >> > /homeY/index.html to /homePerfect >> > >> > both have same name but different contents. >> > >> > I googled but couldn't find any solutions. >> > Ideally I would like a list of failed file copies. >> > >> > Any ideas or scripts or ports? >> > Browsing through 4 home folders is a nightmare. >> > >> > Chris Bennett >> > >> >> If you can't find a switch for cp you may have an easier time using >> rsync, but I'm not too familiar with it so I couldn't tell you >> what switches to use (It may be able to natively do what you're asking >> however). >> Writing a script for it using cp should be quite easy, for each of the >> partition have the script recursively go into all folders and copy the >> files after verifying if the name already exists in the target >> partition. If it does, compare checksums, >> same checksum : do nothing and go to the next file, >> different checksum : copy and append a number to its name (or append to >> it a name for the source partition). > > I looked at rsync and cp and gnu cp. > noclobber just won't do what I want. > > Using checksums seems like a good part of the answer, but name changing > would be very complicated. I have everything read-only except for > regular /home, /var, / and /tmp. I do some of my programming in /home > folder and I also have many html files. I already wrote software to > change file contents to new values, but that adds even more > complications for both of those areas. > > And I want to do this for 4 home folders!!???
IMO, you're over thinking it. Step 1) GET THE DATA OFF THE FAILING DRIVES. Doing *anything* before that's done means you *want* to lose data. Step 2) okay, *now* that the data is safe, compare files between trees and delete duplicates Note that trying to dedup as it's copied will probably *increase* the number of times the data has to be read and thus increase the chance of lost data. Philip Guenther
