I have a client whose sites were migrated to a new server back in 2012, and I am trying to piece together the old archive to retrieve one of the sites that was not moved. I found a set of files in a temp directory on the new host that had 15 files in it, all named "obfw" followed by 6 random characters, and all randomly dated, ranging from 0 bytes to 207MB. They are all archives, and if I append .tar.gz to the end of any of them (aside from the 0 byte one) and open them with the archive manager, they all show that they are archives for a 2GB folder named backup-9.8.2012_13-35-26_p24acata, all from the same date (which is the date that they were migrated). I have tried joining the files together in various orders (alpha, alpha reversed, by apparent dates), and each one dies when I try and extract the resulting archive either with "truncated gzip input" or "gzip compression failed". However, it appears that the different orders that I cat the files together in give varying amounts of the correct data, so it definitely seems like there is at least a chance that they can all be recombined to create a valid archive.
Is there a way to read the headers of these fragments to see what order I should put them in?