Before, we used a cluster of two Windows servers with shared storage system on a single SAN. One of them was a working clustered SQL server with database mirroring. Every part of the system was redundant except for SAN.
It was almost satisfying.
Every cluster server system we know needs shared storage system. The cluster could be fully redundant, but this redundancy is worth nothing without a redundant storage system.
We had a single SAN system. As a single system, SAN was not redundant. But we needed a redundant storage system. We always were afraid that once upon a time our SAN will stop to work.
We, of course, had backups, but it was not enough.
What we needed was the system with no data loss in case of issues and with no interruption (or only several seconds of interruption) in data processing.
We were looking for a relatively simple and not very expensive solution.
Why have we selected StarWind among other storage solutions? Actually, I don’t know why. Simply, I was looking for a solution using Google. StarWind was the first system I found that gave me hope. When I did some tests with StarWind, I stopped looking for anything more.