My first NetWare service call was to upgrade a DCB from 2x40mb drives to 2x80mb drives. That very server went to 4x2gb internal drives and from thinnet to gigabit Ethernet over the years before they finally tried it. 2.15c was a robust OS. Linking nic drivers was a chore. Mapping drive parameters to fit the limits of the OS took me a whole morning once, they would load and then fail creating volumes.