ROBOCOPY FOR MAC PC
However, the Samba server has a default block size of 1k! So setting up the Samba with an explicit block size that matches the one of your client PC solves this issue.Įnter this line bellow the tag (use the block size of your host file system, e.g. I was wondering first, because I set up both NTFS and Ext4 with a Block size of 4K. The reason for this can be found in different block sizes used in NAS and Client. Tthe attentive observer might have recognized that the size on the disk is different. So what now?īut why do they have a different size at all? Thats some file on the client PC: SomeFile on the Client PCĪnd that’s the same file after transferring to the NAS: SomeFile on the NAS Skipping all files with different sizes? No, that’s some dangerous idea when backing up data. The file is copied to skip this file, use /XC. The source and destination files have identical time stamps butĭifferent file sizes. What does CHANGED mean? The answer can be found here: Robocopy kept telling me CHANGED for most files. If your incremental works by now, skip the rest of the article.Īs for me, after solving the above problem, the incremental backups still didn’t work. Obviously, Samba’s time granularity is not as precise, and therefore the time stamps hardly ever match. If this option is not set, a nanosecond-granularity is used. This results in a 2-second-granularity, that is a file is only declared NEWER or OLDER, when it there is a difference of more than two seconds between the source and the destination file. If the problem still persists, a good solution is to make Robocopy use FAT file times ( /FFT). TimestampĪt first, Robocopy kept telling me NEWER or OLDER for each file (even though the file didn’t change), resulting in copying the file instead of skipping it.įirst, make sure that both the NAS and the client PC have the same system time (use an NTP server, for example).
Here are the solutions solving these issues (at least for me), as well as some additional hints to using Robocopy.
ROBOCOPY FOR MAC FULL
Unfortunately, my backup scripts, which have done a splendid job of incrementally backing up my data to an external hard drive for years, now do a full backup to the NAS every time.Īs it turns out, there is not only one reason for this behavior, but two: As of late, I’m the proud owner of a DS213+ NAS, which runs some Linux base OS and Ext4 hard drives.Īs I’m still looking for the perfect backup/versioning client (rsync on windows?!), I thought to stick to Robocopy in the meantime. Until recently, I used to backup my data from an internal NTFS hard drive to an external NTFS hard drive. This will recursively copy the source to the destination and exclude older files as well as '.svn' and '*.pyc' directories/files.I have been using Microsoft Robocopy for years, as it is an easy (by now even a built-in) way to do incremental backups under Windows. Here is the rsync command that is equivalent to your robocopy command: rsync -auv -exclude '.svn' -exclude '*.pyc' source destination Rsync will copy files from one directory to another directory on the same machine like robocopy.
ROBOCOPY FOR MAC FREE
Rsync is free (as in speech) and cross platform, meaning it syncs files between operating systems (Windows/Cygwin, Mac OS, Linux) it works over ssh so it's encrypted and secure unlike FTP it's incremental, so only the parts of changed files are transferred, not whole files, which makes it go like Speedy Gonzalez and the fact that it's command line makes it scriptable and easily automated. Today we'll use rsync to mirror folders between a Mac and PC over a secure connection at the command line. Whether you want to backup your data, distribute files securely or mirror your working documents over the internet from the office to home, between computers on your local network, or from your computer to your web server, rsync can get the job done. See Lifehacker's Mirror files across systems with rsync for more details: Rsync supports copying files over SFTP (SSH File Transfer) which most linux boxes have enabled already (if not manually disabled). You do not need to set up an 'rsync server' to copy files from one machine to another. It sounds like rsync is definitely what you are after.
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