Seagate Exos X18 SAS Product Manual, Rev. D
10
www.seagate.com
General description
3.4
Media description
The media used on the drive has a glass substrate coated with a thin film magnetic material, overcoated with a proprietary protective layer for
improved durability and environmental protection.
3.5
Formatted capacities
Standard OEM models are formatted to 512 bytes per block for 512 emulation drives and 4096 bytes per block for 4096 native drives. The block
size is selectable at format time. Supported block sizes are 512, 520 and 528 for 512 emulation drives and 4096, 4160 and 4224 for 4096 native
drives. Users having the necessary equipment may modify the data block size before issuing a format 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 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 shown below.
Sector
Size
18TB with PI bytes
18TB w/out PI bytes
16TB with PI bytes
16TB w/o PI bytes
Decimal
Hex
Decimal
Hex
Decimal
Hex
Decimal
Hex
512
34,441,527,296
804E00000
35,156,656,128
82F800000
30,616,322,048
720E00000
31,251,759,104
746C00000
520
33,919,336,448
7E5C00000
34,441,527,296
804E00000
30,152,851,456
705400000
30,616,322,048
720E00000
528
33,413,922,816
7C7A00000
33,919,336,448
7E5C00000
29,701,963,776
6EA600000
30,152,851,456
705400000
4096
4,363,911,168
1041C0000
4,394,582,016
105F00000
3,879,206,912
E7380000
3,906,469,888
E8D80000
4160
4,297,064,448
100200000
4,305,190,912
1009C0000
3,819,700,224
E3AC0000
3,827,040,256
E41C0000
4224
4,232,052,736
FC400000
4,239,917,056
FCB80000
3,761,766,400
E0380000
3,769,106,432
E0A80000
Sector
Size
14TB with PI bytes
14TB w/out PI bytes
12TB with PI bytes
12TB w/o PI bytes
Decimal
Hex
Decimal
Hex
Decimal
Hex
Decimal
Hex
512
26,789,019,648
63CC00000
27,344,764,928
65DE00000 22,961,717,248
558A00000
23,437,770,752
575000000
520
26,382,172,160
624800000
26,789,019,648
63CC00000 22,613,590,016
543E00000
22,961,717,248
558A00000
528
25,987,907,584
60D000000
26,382,172,160
543E00000 22,275,948,544
52FC00000
22,613,590,016
543E00000
4096
3,394,240,512
CA500000
3,418,095,616
CBBC0000 2,909,274,112
AD680000
2,929,721,344
AEA00000
4160
3,342,073,856
C7340000
3,348,627,456
C7980000 2,864,709,632
AAC00000
2,870,214,656
AB140000
4224
3,291,480,064
C4300000
3,297,771,520
C4900000 2,821,193,728
A8280000
2,826,698,752
A87C0000
Note
LBA Counts for drive capacities greater than 8TB are calculated based upon
the SFF-8447 standard publication.
ftp://ftp.seagate.com/sff/SFF-8447.PDF
