Seagate ST35000415SS Performance, Reliability, Formatted capacities, Programmable drive capacity

3.3Performance

•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 (non- Self-Encrypting Drive) models.

3.4Reliability

•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

3.5Formatted 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)
	ST32000444SS &		ST31000424SS &		ST3500414SS &
Sector	ST32000445SS		ST31000425SS		ST3500415SS
Size	Decimal	Hex	Decimal	Hex	Decimal	Hex
512	3,907,029,168	E8E088B0	1,953,525,168	74706DB0	976,773,168	3A386030
520	3,824,358,992	E3F31650	1,923,076,936	729FD348	961,538,472	394FE9A8
524	3,773,385,336	E0E94A78	1,882,972,568	703BE198	941,486,288	381DF0D0
528	3,719,165,192	DDADF508	1,876,331,336	6FD68B48	938,165,672	37EB45A8

3.6Programmable 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.

ConstellationES Series SAS Product Manual, Rev. D 7