Thank u for helping! I am a Mac user. Only if not too much trouble, screen shots will help me more.
I am very confused about how ARQ identifies an internal or external drive. From ur answer, ARQ identifies drives by their names. I have a Mac1 and ARQ is doing hourly backup. This Mac1's main drive is called Macintosh HD1. I have an spare drive named HD2 and I make a clone of HD1. I put HD2 in a new Mac2. When the Mac2 is powered up, ARQ should not run as ARQ's scheduler is looking for the source named HD1, but can not find it. Yes?
But I believe that is not the case as I asked ARQ support this question and his answer was:
"ARQ backs up whatever paths you tell it to back up.
If you mount a drive at /Volumes/thing and back it up, and then unplug it and mount a different drive at /Volumes/thing, Arq will back the new drive up as /Volumes/thing."
----- I don't really understand what this means.
Support also said that:
"If you create a clone of a Mac that has Arq installed, the second Mac will start using the same backup set as the first Mac, and they will corrupt each other. DO NOT DO THIS."
Does his answer means ARQ treats external drive and internal drive differently?
On another matter, I understand that u are backing up to more than one cloud providers and also understand that most cloud providers employ RAID to safeguard their data. Does backing up to two cloud providers provides more safety to data lost?
Volumes is going to change based on the name of the drive. For example: one drive could be named BackupA, another drive could be BackupB. On a Mac, they'll show up as /Volumes/DriveName --- replace drive name with the name of the drive. : /Volumes/BackupA and /Volumes/BackupB.
For example:
This is my external drive, right? Called Mac Storage. Apple sees this drive as: /Volumes/Mac Storage
See Arq:
See how Arq sees this?
So depending on the name of the drive, it will be a separate entry. In Arq's reply to you, /Volumes/thing --- thing will change based on the drive's name. In my case: /Volumes/Mac Storage
All Arq support is saying is, if you create a clone copy (by cloning the hardrive of a Mac to a separate Mac) - you don't want both of those Macs backing up with Arq at the same time (they will have the same encryption key and computer name).
I don't think Arq treats external/internal drives differently - all it is is a location to Arq. I have Arq running on my Mac Mini (above), my Macbook Air (laptop), my Work PC, and my Work Laptop (PC). All my data resides in OneDrive. One Drive is on all my computers.
My Mac Mini backs up to B2 Backblaze.
My Macbook Air backs up to Google Drive.
My Work PC backs up to several external drives.
My Work Laptop backs up to Google Drive (different account).
I believe in backing up many times because redundancy is cheap and I only have 180GB.
In your case - if you're using an external drive on two separate Macs --- only have one of them with Arq backing up the external drive to the cloud. No need to have the Second Mac back up the external drive to the cloud if the first Mac is backing it up to the cloud. I think Arq support thinks HD2 is internal.
If you have Arq on multiple computers it will save the data based on the computer. See?
I have my wife's two computers backed up to B2 via Arq, my 4 computers backed up via Arq to B2. It separates them via computer. So you can't have duplication - it is each separate.
[doublepost=1520888446][/doublepost]Now to address your internal vs external drive Question:
B2 is Cloud. Arq Backup is an external drive (red dash). No difference for Arq from what I can tell. Same for my Macs. It will say B2 and "Mac Storage" or whatever the external drive is. It treats them as locations to back up to.
[doublepost=1520888604][/doublepost]Even deeper:
Top two folders are internal drive folders.
Photos exists on external drive. Yet Arq treats them all the same. Backup folders to backup (to B2).
[doublepost=1520888775][/doublepost]
I've yet to move off of my Crashplan Home account and my time to do so is running out. Are any of you using Arq on computers with multiple user accounts? If so, how well does it work, esp. if one of the user accounts is not accessed frequently?
My guess is, it's just a location on the hard drive - so it shouldn't matter. If you're using Windows it's a C:\users\username\foldername thing, if Mac, kinda same thing. It's a service that runs that has Admin (or System) privileges so it can backup all data even if you're logged out and the computer is on.