Seagate ST300MP0004 Savvio 15K.1 FC User Guide - Page 17

3.2 Media description The media used on the drive has an aluminum substrate coated with a thin film magnetic material, overcoated with a proprietary protective layer for improved durability and environmental protection. 3.3 Performance • Firmware-controlled multisegmented cache designed to dynamically adjust segments for enhanced system performance. • 400 Mbytes/sec maximum instantaneous data transfers per port • 15k RPM spindle; average latency = 2.0 msec • Background processing of queue • Supports start and stop commands (spindle stops spinning) • Adaptive seek velocity; improved seek performance 3.4 Reliability • Annualized Failure Rate (AFR) of 0.55% • Mean Time Between Failures (MTBF) of 1,600,000 hours • Incorporates industry-standard Self-Monitoring Analysis and Reporting Technology (S.M.A.R.T.) • 5-year warranty 3.5 Formatted capacities Standard OEM models are formatted to 512 bytes per block. The block size is selectable at format time and must be a multiple of 4 bytes. Users having the necessary equipment may modify the data block size before issuing a format command and obtain different formatted capacities than those listed. To provide a stable target capacity environment and at the same time provide users with flexibility if they choose, Seagate recommends product planning in one of two modes: 1. Seagate designs specify capacity points at certain sector sizes that Seagate guarantees current and future products will meet. We recommend customers use this capacity in their project planning, as it ensures a stable operating point with backward and forward compatibility from generation to generation. The current guaranteed operating points for this product are: Sector Size 512 520 524 528 ST973451FC Decimal 143,374,744 140,395,093 137,577,184 136,331,467 Hex 88BB998h 85E4255h 83342E0h 82040CBh ST936751FC Decimal 71,687,372 70,197,547 68,766,592 68,165,733 Hex 445DCCCh 42F212Bh 4194B80h 4102065h 2. Seagate drives also may be used at the maximum available capacity at a given sector size, but the excess capacity above the guaranteed level will vary between other drive families and from generation to generation, depending on how each sector size actually formats out for zone frequencies and splits over servo bursts. This added capacity potential may range from 0.1 to 1.3 percent above the guaranteed capacities listed above. Using the drives in this manner gives the absolute maximum capacity potential, but the user must determine if the extra capacity potential is useful, or whether their assurance of backward and forward compatibility takes precedence. Savvio 15K.1 FC Product Manual, Rev. B 9