Seagate ST3500071FC manual Media description, Performance, Reliability, Formatted capacities

3.2Media 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.

3.3Performance

•Programmable multi-segmentable cache buffer

•200 Mbytes/sec maximum instantaneous data transfers per port

•7K RPM spindle; average latency = 4.17 msec

•Command queuing of up to 64 commands

•Background processing of queue

•Supports start and stop commands

3.4Reliability

•1,000,000 hours MTBF (Mean Time Between Failures)

•LSI circuitry

•Balanced low mass rotary voice coil actuator

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

•Dithering

3.5Formatted 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.

For 2 gigabit operation, sector sizes must be divisible by 8.

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	ST3500071FC			ST3400071FC
Size	Decimal	Hex	Capacity (bytes)	Decimal	Hex	Capacity (bytes)
512	976562500	3A352944	500,000,000,000	781250000	2E90EDD0	400,000,000,000
520	961538465	394FE9A1	500,000,001,800	769230777	2DD987B9	400,000,004,040
524	941486281	381DF0C9	493,338,811,244	752213841	2CD5DF51	394,160,052,684
528	938165665	37EB45A1	495,351,471,120	749632385	2CAE7B81	395,805,899,280

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 7K, 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.

NL35 Series FC Product Manual, Rev. D 9