from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A notched board at either side of a staircase that supports the treads and risers.
from The Century Dictionary.
- noun One of the notched boards of a stair to which the ends of wooden steps and risers are fastened. Also called
from the GNU version of the Collaborative International Dictionary of English.
- noun (Arch.) A notched board to which the treads and risers of the steps of wooden stairs are fastened.
- noun A board or plank used as a bridge.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun architecture A
notchedboard to which the treadsand risersof the stepsof wooden stairs are fastened.
- noun A
boardor plankused as a bridge.
from Wiktionary, Creative Commons Attribution/Share-Alike License
bridge + board
There may be a jumper setting on the drive, or on the bridgeboard within the external housing you need to change that will allow you to access the entire drive.