PostgreSQL data on a NAS device ?

Hi all,

Does anyone have any experience with putting PostgreSQL data on a NAS
device?

I am asking this because a NAS device is much cheaper to set up than a
couple of SCSI disks. I would like to use a relatively cheap NAS device
which uses four IDE drives (7.200 rpm), like the Dell PowerVault 725N. The
disks themselves would be much slower than SCSI disks, I know, but a NAS
device can be equipped with 3 Gb of memory, so this would make a very large
disk cache, right? If this NAS would be dedicated only to PostgreSQL, would
this be slower/faster than a SCSI RAID-10 setup of 6 disks? It would be much
cheaper...

Any advice on this would be appreciated   :)

Kind regards,
Alexander Priem.