hard drive in Sun Ultra 10

What are the options on upgrading disk space in an Ultra 10 workstation? Sun states they are EIDE drives, are they standard or Sun specific?

Just about everything on a Sun machine is Sun specific. I have not worked with the lower end workstations such as the Ultra 10, so maybe they are standard, but I doubt it. Sun makes their money from hardware, so they like to use proprietary stuff and sell it for exorbitant prices.