Dell Equallogics vs. MD3000i vs other replicated backup options

Hey All,

I'm looking into various SAN offerings to come up with a backup plan for my company.

We have two offices, interconnected by a T1 MPLS line.  500gb or so at the main office and 300gb or so at the branch.

Currently both backup sets are backed up independantly using an LTO3 drive at each location.  

What I would like to do is backup the data to a SAN and have it replicate to the other site.  that way I have all my main office data at the branch and vice versa.

Equallogics looks awesome, built in replication, and volume snapshot capability.  only downfall is the cost.  

Option 2 is a pair of MD3000i SAN's, would require the use of double take or DFS to replicate the data over the wire and would not be as robust as the EQL.

I've looked at HP LeftHand products, replication requires very low latency between sites, and the fact that each node only has a single controller is concerning.  

Any other suggestions all?
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Auric1983Asked:
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BigSchmuhCommented:
I don't think you need a low latency solution for a secondary backup.
Your primary backup is a "backup to disk" local one that can stay on a replicated file system.

The DFS from Win2008 R2 is pretty good at replicating at file level and looks a good candidate.

If you have a disaster recovery plan to add to this scenario, you can use the replicated file system for all non-synchronized files and use Database LOG based replication.

Regarding hardware, I usually go to DAS (using some SAS 2.5" and some SSD for IOPS usage) instead of those insanely expensive SAN...I consider clusters a too complex solution for most production people that leads to more downtime than a raw server active/passive replication which relies on a manual switch decision
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Auric1983Author Commented:
Thanks for your input Big, I would prefer to use a SAN as I want multiple services to be able to access it.  If I go with the MD3000i for example I would start out with this, but eventually we will add more disks for other services.


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BigSchmuhCommented:
If you have the money for it, SAN are great !

Regarding the backup solution:
-A Win2008 R2 DFS allows to synchronize at a file level
-To backup a set of files that are coherent together (as database files are), you need an extra solution
-Example1 of a solution : stop all activities for the applications modifying the set of files, copy to a DFS synchronized directory
-Example2 of a solution : use the application backup and store the backuped files to a DFS synchronized directory
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Auric1983Author Commented:
Thanks for your help.
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