"The Sun System Handbook is your friend ..."
Sun System Handbook:, also known as the SSH:
http://sunsolve.sun.com/handbook_pub
then select the Systems handbook:
http://sunsolve.sun.com/handbook_pub/Systems/
Next, find your equipment; in this instance it's the 3511 array:
http://sunsolve.sun.com/handbook_pub/Systems/3511/3511.html
Choose the "Related Documentation" link on that resource page:
You'll be forwarded to a list of documentation.
http://www.sun.com/products-n-solutions/hardware/docs/Network_Storage_Solutions /Workgroup/3511/index.html
For this particular item, there are two choices,
depending whether you have a firmware 3.x array or have a firmware 4.x array.
Pick one and find the Service Manual as a downloadable PDF file.
You can use these same steps for most every computer system and large peripheral that Sun ever sold.