If that C drive has 462gb of crap on it, that's what I count. I add that all up, toss in another 50% and that's my storage volume.
It's the bit that comes after that part that worries me:
"and that's my storage volume.......needed for the folder redirections. You add this to the volume needed for the company/client data and the volume needed for the server host and VMs and THIS TOTAL is the storage You need to provide in a server.....and maybe 1.5 x that for backup.
So lots of back-of-the-napkin math here (confession, I had to use a RAID calculator, can't do that stuff in my head):
So let's say you have a dozen workstations, and your host server has a DC VM, and Application Server VM, maybe a SQL VM and one or two workstation VMs. The company dataset is 5TB, for arguments sake. Let's say 150GB for the DC, 1TB for the App server, and 500GB for the SQL VM, yeah? So before we get to the folder redirection footprint, we've got storage needs of 6.65TB of storage with 50% fudge factor for growth, that's 10TB. If the workstations have 500GB drives, then by your rule, you need to plan for something close to that as the max redirection for a workstation. x 12 = 6TB x 1.5 to give some room for growth (but not much really), you're at 9TB. So without folder redirection, the server needs 10TB, and with redirection, it needs 19TB, call it 20. To put this into play, you need to DOUBLE the storage you are designing into the physical server.
So let's say you have a standard 2U rack server, you get 8 bays for disks. If you do one big array, which seems to be the favored approach these days, 8 x 2TB SSDs in a RAID 10 gets you 8TB, not enough. You could go RAID6, which would get you 10.9TB. That will do. For server drives, let's say $425 per disk (approx wholesale cost) means $3,400 in storage cost. Maybe $4,400 to the customer? Now, with folder redirection, what would we need? 8 x 4TB disks in a RAID6 would give you 21.8TB, that's probably as close to 20 as you'll get. Now we're up to $760 per disk for server drives so that totals $6,080 cost, maybe $8,000 to the customer. So $3,600 increase to provide folder redirection. And, I'm not sure that's enough to allow for company growth. What if they add 10 employees over the life of the server?
I hadn't worked out an example like this in the past, but I think it illustrates my point. Redirecting folders would add a sizable increase in the cost of a company's server. Some clients are great - they say "We trust you for the details, just tell us what we need". Most are a little less trusting. "$15,000 for a server?!? We're just a little company, we're not MADE of money, you know! What else you got?"
It's a lot to ask of a small (well, whatever you call 12 employees - they would be "medium" to me) business. I'll dig out my RMM this weekend if I can to see if my guesses have any validity.
