=============================================================================== MODEL XT-1140 ============================================================================== Interface: ST506/412 MFM Certified Only Capacity, Unformatted Capacity, Formatted ST-506/412 Compatible Per Drive (Mbytes) : 143.43 Per Drive (Mbytes) : 119.85 Per Surface (Mbytes) : 9.56 Per Surface (Mbytes) : 7.99 Per Track (Bytes) : 10,416 Per Track (Bytes) : 8704 Per Sector (Bytes) : 512 Parameters Performance Specifications Cylinders : 918 Transfer rate, Mbits/sec : 5.0 Data Heads : 15 Access Time (Average) : 27msec Sector\Track : 17 Access Time (Track-To-Track): 4msec Pre-Comp NONE Access Time (Maximum) : 46msec MTBF: 70,000 Hours (POH) Dimensions(Inches): 3.25" x 5.75" x 8.20"" Power Requirements: +12VDC +\- 5%. 1.5A Typical, 4.5A Maximum + 5VDC +\- 5%. 1.7A Typical, 1.9A Maximum NOTE: This drive is Controller dependent. All seeks performed by the XT-1140 are "Buffered" type seeks. Optimal seek times are dependent upon the drive receiving STEP pulses at a rate greater than one pulse every 13 micro seconds. In addition, STEP pulses slower than this causes average access times to degenerate.