High Availability Data - Server Mirroring

Ok, very high maintenance client, only 25 users, but they are movers and shakers.

When a fileserver started wailing due to a RAID failsafe situation, and a genius decided to immediately start restarting the server over and over, we ended up with a corrupt filesystem, causing several hours of downtime.

I would like to be able to replicate this data, in its live state, onto another server, and have the mappings remain persistent. So that a failover becomes transparent, or almost transparent.

What software would allow me to do this? The file server is 2003 R1 and the target server would also be 2003 R1. I have a feeling that FRS would not be the best choice, but what say you?
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shankshankConnect With a Mentor Commented:
Use DFS technologies that is included with windows 2003

You can easily replicate with DFS exact volumes, or shares, etc

see here


Only catch is you need to upgrade to R2

but it will be the perfect solution
automatically replicates between servers

and you can create a script for a failover of the network
DerekleuAuthor Commented:
Upgrading to r2?

Have they come out with an r2 patch/upgrade? Last I heard that didn't exist.


It seems regular DFS is what I need to be using. Anyone know of a FAQ, or definitive guide to using DFS? Something that not only tells you what it is supposed to do, but what I can't do, and what its known weaknesses are?
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that's the crappy party. You need to buy Windows 2003 again, which comes with R2 (addon)
so you need to buy 2 copies of windwos 2003, upgrade your current installed version with the included r2 cd

then install windows 2003 on a new box, then use r2 cd, then you will be set

hang on for dfs articles
one side note is that you cannot rely on DFS technology as a backup.
for ex

lets say you setup DFS to replicate immediately to another server

If you make a change on server one, its going to server 2
server 1 delete file = server 2 delete file

my failover is that I am using Backupexec with CPS (continuous backup protection) so as a file gets modified on my file server it gets backup on my backup server. it also backs up changes every hour so i can revert back to what I want. If my file server crashes then I could restore what I have live onto another server ...

DerekleuAuthor Commented:
You are using a dedicated backup server with disk based CPS, and offloading to tape every hour?

I am thinking of having 2 DC/File servers with DFS, and have one of them back up to tape every night.

High availability has priority over a dedicated backup server in my situation. These guys would rather lose 12 hours work than have the entire office at a standstill for an afternoon.

 I may have a 3rd server be a dedicated Backupexec server at a later time.

We are using a dedicated backup server, CPS at every file change to disk, and offloading to tape at night using differential backup.

Yeah setting up 2 DCs with DFS and then  having a tape backup at night would be good.

The only problem I am not sure of is that if setup instantly, as said before, if the server1 data would be deleted, would that result in server2 data being deleted
DerekleuAuthor Commented:
Ok, I'm going with DFS. My secondary DC is now up.

Here is my situation:

Server 1: DC+file server
Server 2: DC

I would like to have server 2 keep a copy of the files on server 1, and synchronize them as much as possible. If I could get them both under a single DFS root for transparent failover, that would be great.

Is there a step by step that would alllow me to accomplish this?
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