< Yes, but in a desktop machine, power is not exactly short. In other word < whether it takes 0.1W or 10W to move the heads is not a major < consideration. So a jewelled bearing is probably not appropriate here. That is a consideration! Less power is less heating, less magnetic fields and higher reliability. Despite desktop power availablity reducing power in the servo circuit aids minaturization and reliability. < a meter movement. And secondly they are accurate - the spindle runs true < but a good metal bush bearing can do that as well. Neither are major < problems in a desktop servo-tracked disk drive. The bushed bearing also wears. Jewelled bearings done seem to have the same wear properties, they are far better. Allison