So.. I have to weigh in here.. I don't know if people know i do the classes for freenas, but you can use it as a gui for both formatting drives and replication.. and it's free. and it has time machine.. In my environment I just has a small nas box that i backup to all of my systems including my macs. I just saw rsync.net will take zfs receives and charge .06 per GB per month for zfs. linda On 9/4/15 2:28 PM, Jeff Chapin wrote: > The script would take a little tweaking, but it could work. > > I, personally, know that I would get lazy at some point and fail to > swap the drives for months on end. I would consider taking one of the > drives to both locations, and getting an initial backup of each > location, and then mirroring that to the other drive -- and then have > both locations back up to both drives. Alternatively, you could backup > both drives to the local drive, and then mirror the two drives(you > could do hourly local backups, and nightly remote copies). Since rsync > only transfers the differences, once you have the initial backup, it's > likely that each day's change is fairly small. If you use the flag to > make rsync aware of the hardlinks, you could presumably replicate a > full copy of the day's hourly backups fairly quickly. > > > On Fri, Sep 4, 2015 at 2:17 PM, Mike Miller <mbmiller+l at gmail.com > <mailto:mbmiller+l at gmail.com>> wrote: > > That is really cool! I'll have to try something like that. I'm > thinking a good strategy is to have two drives, both with all the > same stuff on them, and I'll use them both to backup all my Linux > boxes (home, office, laptops). I'll just switch between home and > office every week or so. That way if my house burns down or my > office is burglarized, I still have a copy of everything from last > week at the other location. > > Does that seem reasonable? The thing I'm not sure of is how that > strategy would work with the "time machine" concept -- I'd be > using two drives and swapping them weekly. > > Mike > > > > On Fri, 4 Sep 2015, Jeff Chapin wrote: > > Looking at the rsync command you gave, it looks correct -- but > rsync can do > so much more when backing up! > > Using the magic of rsync, and the magic of hardlinks, you can > make a full > backup, in incremental time and space. Rsync has, built into > it, the > ability to compare your most recent backup files with existing > backup > files, and if they are they same, use a hard link, and copy > them over if > they differ. This allows you to store just the files that > change -- but it > looks like a full backup every time it runs. This way, you can > keep, say, > hourly backups for the last week -- and recover an > accidentally deleted or > altered file, even after the latest backup has run. > > For more details: > https://blog.interlinked.org/tutorials/rsync_time_machine.html > > > > On Fri, Sep 4, 2015 at 8:21 AM, T L <tlunde at gmail.com > <mailto:tlunde at gmail.com>> wrote: > > Assuming that you have NOTHING on the drive that you care > about, I would > remove the factory partitioning and create a new GPT table > with parted. > > Then, format that as ext4. > On Sep 3, 2015 3:17 PM, "Mike Miller" > <mbmiller+l at gmail.com <mailto:mbmiller%2Bl at gmail.com>> wrote: > > How to format? > > I have a couple of Linux boxes that I would like to > regularly backup to a > 5 TB external drive. It seems like it would be a good > idea to format that > drive with ext4. Can I just do that with gparted? > The drive comes with > NTFS format. Are there any issues I should know about? > > > Which directories to back up? > > What really needs to be backed up? I guess if the > system totally failed > I'd install Linux (Ubuntu) again. Of course /home is > needed, but > /usr/local and /opt often have programs I've installed > and /etc will have a > bunch of settings. I guess /var can have some > important stuff. Are > crontabs stored in /var? > > > Which software to use for backup? > > I guess I want only to have in backup what is on the > originating drive. > So if I have deleted a file, I want it to be deleted > on the backup drive, > too. I assume rsync can do this. Would this be correct?: > > rsync -av --update --delete /home /usr/local /etc /var > /opt /media/me/back > > > TIA! > > Mike > _______________________________________________ > TCLUG Mailing List - Minneapolis/St. Paul, Minnesota > tclug-list at mn-linux.org <mailto:tclug-list at mn-linux.org> > http://mailman.mn-linux.org/mailman/listinfo/tclug-list > > > _______________________________________________ > TCLUG Mailing List - Minneapolis/St. Paul, Minnesota > tclug-list at mn-linux.org <mailto:tclug-list at mn-linux.org> > http://mailman.mn-linux.org/mailman/listinfo/tclug-list > > > > > -- > Jeff Chapin > President, CedarLug, retired > President, UNIPC, "I'll get around to it" > President, UNI Scuba Club > Senator, NISG, retired > > _______________________________________________ > TCLUG Mailing List - Minneapolis/St. Paul, Minnesota > tclug-list at mn-linux.org <mailto:tclug-list at mn-linux.org> > http://mailman.mn-linux.org/mailman/listinfo/tclug-list > > > > > -- > Jeff Chapin > President, CedarLug, retired > President, UNIPC, "I'll get around to it" > President, UNI Scuba Club > Senator, NISG, retired > > > _______________________________________________ > TCLUG Mailing List - Minneapolis/St. Paul, Minnesota > tclug-list at mn-linux.org > http://mailman.mn-linux.org/mailman/listinfo/tclug-list -- Linda Kateley Kateley Company Skype ID-kateleyco http://kateleyco.com -------------- next part -------------- An HTML attachment was scrubbed... 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