Product manual

Savvio FC Product Manual, Rev. D

3.4 Reliability

• Mean Time Betwen Failures (MTBF) of 1,400,000 hours.

• LSI circuitry

• Balanced low mass rotary voice coil actuator

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

• Dithering

• 5-year warranty

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.

Note. 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 other drive families and from generation to genera-

tion, 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 for-

ward compatibility takes precedence.

3.5.1 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 Fibre Channel Interface Manual, part number 7767496. 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.

Sector Size

ST936701 ST973401

Decimal Hex Decimal Hex

512 71,687,372 445DCCC 143,374,744 88BB998

514 70,512,692 433F034 141,025,384 867E068

520 70,197,546 42F212A 140,395,092 85E4254

522 68,914,176 41B8C00 137,828,352 8371800

524 68,766,592 4194B80 137,577,184 83342E0