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NL35 Series FC Product Manual, Rev. D
9
3.2 Media 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.
3.3 Performance
• 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
3.4 Reliability
• 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
3.5 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.
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:
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.
Sector
Size
ST3500071FC ST3400071FC
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