640KB 256MB ought to be enough for anyone. I struck gold when I took apart the ReadyNAS Duo. Underneath the metal plates I found end-user changable RAM module! There doesn’t seems to be any warranty stickers on the chassis.
Upgradable RAM module on the ReadyNAS
256MB is quite a lot for normal usage. If you are those linux fanatics who hope to make the ReadyNAS Duo a mini server running your web scripts + database + radius server + something something … Then 256MB is obviously not enough for you! Go for 1GB! Do take note that you need to have DDR400 modules.
Default 256MB RAM module on the ReadyNAS Duo
Can’t wait to run memory intensive applications (e.g. MLDonkey) on the ReadyNAS!