App to backup a NAS onto multiple USB drives

[VinceLP]

Hi guys.

First thread for me here .
I'm looking for an app that has "weird" backup possibilities.

Let me explain : i have a 4 bays NAS with each bay containing a 2TB HD (soon to be 5TB in each bay).
The NAS is configured for RAID 5 use... but i have an extra layer of security : every now and then, i bakcup all the NAS content onto USB drives (currently onto 4 drives, i'll probably expand it to 6 drives... because i don't have a 6 or 15TB USB drive ) that i store somewhere else.

The app i use is an app i made myself for Windows which :
- only backups files that are not already on one of the USB drives ('cause it would take quite a while to backup everytime everything from scratch)
- backups each file on the first drive where there's enough space
Nothing fancy, it just copies files from 1 NAS (seen as 1 drive) and dispatches thoses files between multiple drives.

I'd like to get rid of my Windows computer so i have to replace my app.
The thing is, though i'm a software dev, i only work on the Windows plateform... i'd like to learn Swift, use xCode, ... and re-write my app but it'll take time, time that i'm not ready to spend just yet...

So... do you guys know any app that would do what i need and that runs on OSX ?
In advance, thank you (a lot) for your help.

Vincent

 

[AndyK]

Carbon Copy Cloner can do that.

 

[VinceLP]

Carbon Copy Cloner can do that.

Thanks Andy, i appreciate your help

Their website seems to only mention the ability to backup to 1 volume (max) as a destination so, to make sure (not that i don't trust you ), i sent them an email.

 

[phrehdd]

You didn't say what make of NAS you have. This would be helpful as some makes and models provide the ability to have within the NAS itself either applications or scripting available to do these tasks. What is the physical set up for the backup to the USB drives (how are they connected - USB3 or USB2 or...)?

 

[VinceLP]

You didn't say what make of NAS you have. This would be helpful as some makes and models provide the ability to have within the NAS itself either applications or scripting available to do these tasks. What is the physical set up for the backup to the USB drives (how are they connected - USB3 or USB2 or...)?

The NAS is a Synolgy DS411+, connected via ethernet to a switch & to the whole network.
The USB drives (USB 3) are connected to a PC which is connected to the (same) network.
The NAS does have 2 USB ports (USB 2, i guess) but i don't know if i can plug an USB hub (in order to have more than 2 USB drives connected)... doubt it, but i'm not sure though.

The "backup split" is clearly the weird thing because i don't want to say "this folder goes to this drive", ... i want the split (=the distribution) to be automatic.

Thanks for your reply.

 

[VinceLP]

Just for info, the CCC team told me this :

Vincent,


CCC backs up from one volume and to one volume at a time, a single backup task cannot span two target volumes


If you can establish the split at a high level, you could then configure multiple tasks within CCC to back up each of the higher-level folders to one of the backup volumes. That's basically what you're looking for, but the programmatic configuration of that kind of task would be almost impossible. Well, initially it could be easy, but most users aren't adding data evenly to their folders, and that's what would be difficult to plan for. You have a much better idea about how your data should be organized and how it will grow.​