Please follow all the steps to upgrade the easyStore from b325 to b6xx :

1) Please download the latest firmware from the Support Website ( http://support.acer-euro.com/drivers/server/altos_easystore.html )
2) Do a backup/copy of all the data inside the easyStore on an other machine
3) Shutdown the system by pressing the front button for 4 seconds
4) Pull out all the Hard Disk Drive
5) PowerOn the easyStore
6) Run the System Console to find the easystore. Check the IP Class and log into it by the browser
7) Insert all the Hard Disk Drive, one by one. Please wait the led activation before inserting an other disk
8) Press "scan" button and then select the new firmware
9) Press next and then follow the wizard to reconfigure the storage.

Note: We reccomends to create a RAID 5 to have more space and redundancy.