Seagate ST400FX0002 Pulsar XT.2 SAS Product Manual - Page 16

4.5 Formatted 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 UNIT 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: 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 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 shown below. The Capacity stated is identical when the drive is formatted with or without PI enabled. Table 1: Formatted Capacity LBA Count Capacity (LBAs) LBA Size 512 520 524 528 4096 4160 4192 4224 400GB Decimal 781,422,768 Hex 2E9390B0h 764,871,800 2D970478h 754,677,072 2CFB7550h 743,833,040 2C55FDD0h 97,677,846 5D27216h 96,153,847 5BB30F7h 95,419,848 5AFFDC8h 94,696,970 5A4F60Ah 200GB Decimal 390,721,968 Hex 1749F1B0h 382,435,904 16CB8240h 377,338,536 167DBAA8h 371,916,520 162AFEE8h 48,840,246 2E93E36h 48,076,924 2DD987Ch 47,709,924 2D7FEE4h 47,348,485 2D27B05h 100GB Decimal 195,371,568 Hex BA52230h 191,217,952 B65C120h 188,669,272 B3EDD58h 185,958,264 B157F78h 24,421,446 174A446h 24,038,462 16ECC3Eh 23,854,962 16BFF72h 23,674,243 1693D83h 4.6 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 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. 4.7 Factory-installed options OEMs 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 LBA size requested. • Single-unit shipping pack. The drive is normally shipped in bulk packaging to provide maximum protection against transit damage. Units shipped individually require additional protection as provided by the single unit shipping pack. Users planning single unit distribution should specify this option. • The Safety and Regulatory Agency Specifications, part number 75789512, is usually included with each standard OEM drive shipped, but extra copies may be ordered. 8 Pulsar XT.2 SAS Product Manual, Rev. B