Block Size and various FS settings

Hi Everyone

Im setting up a machine that will host postgres 8.0.3.

The main tables will be:

Product - around 5 million records.

keywords - around 80 million records.

The machine that will host it is IBM x345 with two XEON, 3GB RAM,
ServeRAID 6i and 6 15K HD.

The OS ( Centos4.1 ) will be installed on the RAID 1 ( 2 HD )

The PG Data will be initialized on RAID 10 ( 4 HD ).

should I stick to the default postgres 8192 block size ?

If so, the same 8192 should be applied to the Reiserfs block size ?

and what about the RAID hardware striping size ?

Read on the net that pg 8k, reiserfs 8k and Raid strip of 64k will be
the best.

http://forums.devshed.com/archive/t-33101/Any-RAID-striping-recommendations

Is it safe to use noatime, nodirtime, notail on the partion of PG data ?

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