And what if something happens to your building? Their history of backups goes "poof"...and then they have some issue with a database and you have to reach back to a backup of 7 days ago...and the local device doesn't do that? You're stuck...cuz you haven't had other locations to "mirror" to.
IMO, shopping for offsite backup companies...redundant locations is a must have. We even do that with our hosted e-mail washing system...we have 3 different locations. It's just smart.
I can't see cellular doing that well...even 4g. Perhaps if you're doing basic file backups..and only doing changed. But then in that case, plain backups is not BDR..title of this thread. BDR includes image backups..for fast restoration of servers.
thats what crashplan is for, and the external. If Im here, and its an emergency, i can grab that external. I wouldn't let any backup go without running over 2 days, so 7 days isnt an option. I just dont have the need for it. 4G does great actually, ive had 3 backups run in a test, each doing 100k down.
The unlikely event that something happens to my building, and the customers building, and crashplan, and ++++ (hopefully nothing ever happens). Unlikely scenarios, yes, its possible, but so unlikely. if these were cleints that have mission critical systems, for that, we would go with ditto or another appliance that does the job with more reliability. But for non-critical file backup, this works great.
Can you tell us the worst situation you had to recover from? how did it go and how long did it take to get the client operational?
Not all clients need or want to pay for everything someone like Datto offers, but when things go wrong I wonder how you manage their expectations on when they will be back running?
An associate of mine sells Datto as his entry into managed services for new clients and really stresses time to recovery as much as the safety of the backup.
Worst was a clothing store, HD failure. We do a bare metal backup once a week to their local NAS. restored the image from their NAS, and was able to transfer the files from my backup server within an hour and a half between the two, back set on my server was about 4 Gigs. Could have been faster to use the local external, but I wanted to test my systems too. It happed on a day they were not open until late, so I had the time.
I tell my customers that if something goes wrong that impacts productivity, we are onsite within 4 hours, but this is typically within 2 hours.
I already had it on paper to have the backups replicated to another location if I got close to 20, so its about that time.
My main point, is it is not a necessity to have a replication server, if your still small and starting out. Its was a great starting point for us getting into this market. its also not a necessity to have two dedicated ISPs if your not backing up mission critical files/servers.
Also, think about it, if 4G didnt work so great, retail chains wouldnt be using them as a backup source of internet if their primary ISP goes out. i know this, because I have been doing a lot of this the last couple of months. 4g/3g modem ->cradlepoint ->backup router