Ideal Disk recommendation for PostgreSQL

Hi All,

We are right now in initial phase to setup a production server having
PostgreSQL database installed and would require help with Disk
configuration. The database size would grow approx to 500 GB. I have gone
through the following link
http://momjian.us/main/writings/pgsql/hw_performance/index.html which was
very helpful. However what I would like to understand is, do you have any
figures around minimum / optimal disk performance for postgresql to operate?
As an example I remember MS have a document on Exchange that gives some
rough guidance around the number of IOPS it needs depending on number of
users / mailbox size.

Any suggestions are welcome !

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Thanks and Regards

Bhaskar Sirohi
bhaskar(dot)sirohi(at)druvaa(dot)com
www.druvaa.com
(C) +91 986 094 6619