Seagate ST3450856FC Performance, Reliability, Formatted capacities, Factory-installed options

3.3Performance

•Programmable multi-segmentable cache buffer

•800 Mbytes/sec maximum instantaneous data transfers per port

•15k RPM spindle; average latency = 2.0 msec

•Command queuing of up to 128 commands

•Background processing of queue

•Supports start and stop commands (spindle stops spinning)

•Adaptive seek velocity; improved seek performance

3.4Reliability

•Annualized Failure Rate (AFR) of 0.55%

•Increased LSI circuitry integration

•Self-Monitoring Analysis and Reporting Technology (S.M.A.R.T.)

•Dithering

•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 one of the supported sizes listed in the table below.

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:

	ST3450856FC		ST3300656FC		ST3146356FC
Sector Size	Decimal	Hex	Decimal	Hex	Decimal	Hex
512	879,097,968	3465F870	585,937,500	22ECB25C	286,749,488	11177330
520	860,480,771	3349E503	573,653,848	22314358	280,790,185	10BC84A9
524	849,011,700	329AE3F4	566,007,800	21BC97F8	275,154,368	106685C0
528	836,812,167	31E0BD87	557,874,778	21407E5A	272,662,935	10408197

3.5.1Programmable drive capacity

Using the Mode Select command, the drive can change its capacity to something less than maximum. See the Mode Select Parameter List table in the SCSI Commands Reference Manual. Refer to the Parameter list block descriptor number of blocks field. A value of zero in the number of blocks field indicates that the drive shall not change the capacity it is currently formatted to have. A number in the number of blocks field that is less than the maximum number of LBAs changes the total drive capacity to the value in the block descriptor number of blocks field. A value greater than the maximum number of LBAs is rounded down to the maximum capacity.

3.6Factory-installed options

You may order the following items which are incorporated at the manufacturing facility during production or packaged before shipping. Some of the options available are (not an exhaustive list of possible options):

• Other capacities can be ordered depending on sparing scheme and sector size requested.

Cheetah 15K.6 FC Product Manual, Rev. A 9