ProDATA Drive 23GB Internal SCSI BULK
"Professional Disc for DATA" drives support both CAV (constant angular velocity) and CLV (constant linear velocity) transfer modes when reading and writing data. In CAV mode the disc rotates at a constant speed, meaning that the transfer rate slows as the pickup approaches the center of the disc, but seek operations are fast (110ms average). In CLV mode the speed of the pickup is constant, so although seek operations take longer, the maximum transfer rate of 11MB/s is maintained at all times. The drive firmware automatically selects the Optimum mode to ensure the best overall performance. For example, if accessing a series of relatively small text files, CAV is used for fast seek times, but when reading large music or video files, CLV is employed to ensure the maximum transfer rate. The factory setting ensures that the drive automatically selects the optimum transfer mode. But if necessary the user can select the transfer mode: DIP switches allow selection of either CAV or Optimum mode, while any one of the three modes (CAV, CLV or Optimum) can be specified by a mode select command.
Sony ProDATA Drive 23GB Internal SCSI BULK. Drive device, buffer size: 16 MB, Burst transfer rate: 160 MB/s, Power consumption (typical): 17.3 W. Weight: 2.65 lbs (1.2 kg). Power requirements: 5 V +/- 5%, 12 V +/- 5%, Form factor: Internal, Native capacity: 23 GB