Seagate ST32000646SS Constellation ES SAS Product Manual - Page 16

4.3 Performance • Programmable multi-segmentable cache buffer • 600MB/s maximum instantaneous data transfers. • 7200 RPM spindle. Average latency = 4.16ms • Background processing of queue • Supports start and stop commands (spindle stops spinning) • Adaptive seek velocity; improved seek performance Note. There is no significant performance difference between Self-Encrypting Drive and standard (nonSelf-Encrypting Drive) models. 4.4 Reliability • Annualized Failure Rate (AFR) of 0.73% • Mean time between failures (MTBF) of 1,200,000 hours • Balanced low mass rotary voice coil actuator • 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 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 block 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: Capacity (Blocks) Sector Size ST32000444SS ST32000445SS ST32000446SS Decimal Hex 512 3,907,029,168 E8E088B0 520 3,824,358,992 E3F31650 524 3,773,385,336 E0E94A78 528 3,719,165,192 DDADF508 ST31000424SS ST31000425SS ST31000426SS Decimal Hex 1,953,525,168 74706DB0 1,923,076,936 729FD348 1,882,972,568 703BE198 1,876,331,336 6FD68B48 ST3500414SS ST3500415SS ST3500416SS Decimal Hex 976,773,168 3A386030 961,538,472 394FE9A8 941,486,288 381DF0D0 938,165,672 37EB45A8 4.6 Programmable drive capacity Using the Mode Select command, the drive can change its capacity to something less than maximum. See the Mode Select (6) parameter list table in the SAS Interface Manual, part number 100293071. A value of zero in the Number of Blocks field indicates that the drive will not change the capacity it is currently formatted to have. A number other than zero and less than the maximum number of LBAs in the Number of Blocks field changes the total drive capacity to the value in the Number of Blocks field. A value greater than the maximum number of LBAs is rounded down to the maximum capacity. 8 Constellation ES Series SAS Product Manual, Rev. F