Drive Specifications; Formatted Capacity; Default Logical Geometry; Physical Organization - Seagate ST317221A Product Manual

U8 Family Product Manual, Rev. A

1.0 Drive specifications

Unless otherwise noted, all specifications are measured under ambient
conditions, at 25°C, and nominal power. For convenience, the phrases
the drive and this drive are used throughout this manual to indicate the
ST317221A, ST3130210A, ST38410A and the ST34313A.

1.1 Formatted capacity

Drive Model Guaranteed Mbytes
(1 Mbyte = 10
ST317221A
ST313021A
ST38410A
ST34313A

1.1.1 Default logical geometry

CHS Mode Cylinders
ST317221A 16,383
ST313021A 16,383
ST38410A 16,383
ST34313A 8,944
LBA Mode
When addressing either drive in LBA mode, all blocks (sectors) are
consecutively numbered from 0 to n–1, where n is the number of
guaranteed sectors as defined above .

1.2 Physical organization

Drive Model Read/Write heads (GMR)
ST317221A
ST313021A
ST38410A
ST34313A
Guaranteed
6 bytes) sectors
17,245 33,683,328
13,022 25,434,228
8,622 16,841,664
4,327 8,452,080
Read/Write heads Sectors per track
16
16
16
15
4
3
2
1
5
Bytes per
sector
512
512
512
512
63
63
63
63
Number of discs
2
2
1
1