This is a reply on A bit on SANs and system dependencies by Eric Bergen.

Lets first start by making a difference between entry level, midrange and high-end SAN's.

Entry level:
This is basically a bunch of disks with a network connection. The Oracle/Sun/StorageTek 2540 is an example for this category. This storage is aimed at lowcost shared storage.

Midrange:
This kind of storage generally features replication and more disks than entry level. HP EVA is what comes to mind for this category. This storage is aimed at a good price/performance.

High-End:
This is mainframe style storage which is made usable for open systems. Hitachi Data Systems VSP is a good example of this category. This category is for










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