Seagate ST3300655LC Cheetah 15K.5 SCSI Product Manual - Page 14

4.3 Performance • Supports industry standard Ultra320 SCSI interface • Programmable multi-segmentable cache buffer (see Section 5.5) • 15k RPM spindle. Average latency = 2.0 msec • Command queuing of up to 64 commands • Background processing of queue • Supports start and stop commands (spindle stops spinning) 4.4 Reliability • Annualized Failure Rate (AFR) of 0.62% • Increased LSI circuitry integration • Incorporates industry-standard Self-Monitoring, Analysis and Reporting Technology (S.M.A.R.T.) • 5-year warranty 4.5 Formatted capacities Standard OEM models are formatted to 512 bytes per block. The sector size is selectable at format time. 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 512 514 520 522 524 528 ST3300655LW ST3300655LC Decimal Hex 585,937,500 22ECB25C 574,712,644 22416B44 573,653,847 22314357 570,053,000 21FA5188 566,007,800 21BC97F8 557,874,778 21407E5A ST3146855LW ST3146855LC Decimal Hex 286,749,488 11177330 282,050,768 10CFC0D0 280,790,184 10BC84A8 279,041,740 10A1D6CC 275,154,368 106685C0 272,662,935 10408197h ST373455LW ST373455LC Decimal 143,374,744 141,025,384 140,395,092 139,463,602 137,577,184 136,331,467 Hex 88BB998 867E068 85E4254 8500BB2 83342E0 82040CBh 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 10K and 15K 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. 8 Cheetah 15K.5 SCSI Product Manual, Rev. J