Run "postgresql\9.0\data" on a RAID-1 disk on my Local Area Network (LAN)

Hello – I´m trying to install PostgreSQL and PostGIS ”asking” PostgreSQL to
store data on my new Netgear NAS Duo LAN-disk in a Windows XP sp2
environment.

In the Setup Wizard I accept C:\Program\PostgreSQL\9.0

and I change C:\Program\PostgreSQL\9.0\data to either
//R1/aa_db/PostgreSQL\9.0\data or P:\PostgreSQL\9.0\data where P:\ =
//R1/aa_db/ on the computer from which I´m installing Postgresql.

R1 is the name of the Netgear disk och aa_db the Share/folder I want to
store the PostgreSQL data in.

I have tried every possible combination I can think of. Sometimes the
installation seems to work, but in pgAdmin “Connected?” says “No”. If I try
to install PostGIS afterwards I crashes during the EnterpriseDB Stackbuilder
installation.
After several hours I can´t find any useful information in the manual or on
the FORUMs.
If anybody could give me a hint where I should look I would be so happy.
Regards Anders Söderman Stockholm Sweden