DISCLAIMER: I am not a SAN storage expert but I have spent a lot of time looking into SAN storage systems from the business side and I thought I'd share some of my conclusions.
It seems that the proverbial question is how to balance the performance, cost, usable space, and availability of a storage solution. Any DBA will ask you to give him RAID 10 on small fast disks. Anyone paying the bills will ask "Why can't I use half the disks I bought?"
Recently, I was asked to give some advice on an integration project involving some Solaris web servers . One of the sides requested to install the top command. Now I know and love top for Linux but using top on Solaris is a waste in my opinion. Solaris comes with the prstat command built in- why use something else? Of course he answered that top was standard for him and he was used to it but I felt obliged to convince him otherwise so I dug around and found some proof 🙂
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One of the issues was the following message which the machine logged hundreds if not thousands of times: