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I'm looking for a free solution to build virtual disk targets accessible over SAN (iSCSI). Primary requirement for me is data deduplication support. After much search on the internet i came across quadstor ( and nexentastor ( nexentastor isn't on linux but since they include everything as an iso its fine by me.

But i haven't been able to get any reviews on these software. Has any one had experience with either ? Have i missed any other obvious solution ?


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closed as not constructive by Sven, MDMarra, Tom O'Connor, Sam Jan 21 '12 at 16:30

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Welcome to Server Fault! Please read the faq. This kind of discussion-oriented question is off topic. – MDMarra Jan 21 '12 at 14:49
SAN is fibre channel. iSCSI is IP. – Nils Jan 21 '12 at 20:25
@Nils not accurate. There are iSCSI and Infiniband SANs as well as FC. Having FC interfaces is not the defining characteristic of a SAN. – MDMarra Jan 21 '12 at 22:39

If you're tied to Linux, then you can take a look at building something with IET ( for hosting iSCSI targets, and LessFS does block level deduplication ( I'm not sure about the production-readyness of LessFS though - I've never heard of anyone using it in anger.

That said, this appears to be a no-brainer for something like FreeNAS ( or OpenIndiana ( - neither of which are Linux but both would be my first choice of doing something like this, on a budget of zero.

Nexenta's also pretty good, but as you point out, that's not Linux either.

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