In pictures: Taking apart D-Link's xStack DSN-2100...
The inside of the D-Link xStack DSN-2100-10 is quite roomy so you can easily reach the memory and any other components that may need maintenance or replacing. Fully configured, the SAN array has 512MB of DDR1 system memory and 4GB of disk write cache memory. The write cache is protected by battery for up to 72 hours in case of a total power failure.
In pictures: Taking apart D-Link's xStack DSN-2100-10 SAN array