On 25.03.16 11:16, Jon Elson wrote: > On 03/25/2016 09:28 AM, Jerry Scharf wrote: > > No one mentioned my favorite way, so I will just throw it out there. rsync > > is a very good way to keep directory trees synced.
> Yes, my system is to use ssh and sftp to move files around, > I do keep .ngc files on the machines (I only have 2 CNC > machine computers, so it is not a big management deal.) I > use rsync to backup everything to a hard drive on my main > desktop. The OS and user files are on an SSD, the magnetic > hard drive is used ONLY for backup. My favourite is also rsync, but there is one thing to watch out for, if backing up to unreliable media such as flash sticks. Some of them last for years, with many writes, but I've had one which developed about 6% corruption in less than 1% of files. Since neither the ctime nor the size of the files changed, rsync did not detect the corruption. By default, rsync finds files that need to be transferred using a "quick check" algorithm which only looks for files that have changed in size or in last-modified time. Safer is: -c, --checksum With this option, rsync compares a 128-bit checksum for each file that has a matching size. That can slow things down significantly, but what use is a corrupted backup? Erik ------------------------------------------------------------------------------ Transform Data into Opportunity. Accelerate data analysis in your applications with Intel Data Analytics Acceleration Library. Click to learn more. http://pubads.g.doubleclick.net/gampad/clk?id=278785471&iu=/4140 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
