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I have a server, file server and a NAS Server. The storage on file server is created using ISCSI on NAS Server, and it's include with users' files (stored on NAS Server ISCSI).

The problem is, when i have a network problem where NAS server and file server disconnected, the ISCSI is gone, and it really take a long time for a user to login to server since users file is on ISCSI that shared via file server.

So, i want to create a backup for my network so when NAS and File Server disconnected, it still can connected via this backup network.

i'm using windows server 2008 R2 standard and eonNas. how can i make a backup for my network like this??

thank you for your answer.

fakhri nur zakky
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For optimal performance and reliability iSCSI storage is typically connected to hosts via a dedicated network (or, in some cases, multiple dedicated networks).Rather than a "backup network", I think you should be thinking about a dedicated storage network. Doing that could be as simple as dedicating a couple of inexpensive layer 2 switches to handling only iSCSI traffic (though I'd spend a little more and get managed switches).

Isolating the iSCSI traffic to a dedicated network allows for:

  • Maintenance on the front-end network w/o causing hosts to lose their connection to storage

  • Use of jumbo frames (which may not be practical to support on the front-end network)

  • Enhanced information security (confidentiality, integrity, availability) because the iSCSI network is not directly accessible by any devices other than the hosts and storage

  • Minimizing potential non-deterministic behavior as a result of high-traffic or protocol-induced delays that might be present on the front-end network (think broadcast storms, adjacency table flooding when a layer 2 device "goes crazy" or an attacker launches ettercap, spanning tree thrashing nightmares)

The fact that you're having situations where "where NAS server and file server disconnected" seems to suggest that you're having stability problems on your front-end network. Isolating the iSCSI traffic to a smaller, dedicated, more predictable network wouldn't cost a lot of money and you'd probably reap major stability rewards.

Evan Anderson
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