8
Pulsar XT.2 SAS Product Manual, Rev. B
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.
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.
Table 1:
Formatted Capacity LBA Count
Capacity (LBAs)
LBA
Size
400GB
200GB
100GB
Decimal
Hex
Decimal
Hex
Decimal
Hex
512
781,422,768
2E9390B0h
390,721,968
1749F1B0h
195,371,568
BA52230h
520
764,871,800
2D970478h
382,435,904
16CB8240h
191,217,952
B65C120h
524
754,677,072
2CFB7550h
377,338,536
167DBAA8h
188,669,272
B3EDD58h
528
743,833,040
2C55FDD0h
371,916,520
162AFEE8h
185,958,264
B157F78h
4096
97,677,846
5D27216h
48,840,246
2E93E36h
24,421,446
174A446h
4160
96,153,847
5BB30F7h
48,076,924
2DD987Ch
24,038,462
16ECC3Eh
4192
95,419,848
5AFFDC8h
47,709,924
2D7FEE4h
23,854,962
16BFF72h
4224
94,696,970
5A4F60Ah
47,348,485
2D27B05h
23,674,243
1693D83h
