Drive Specifications; Formatted Capacity; Default Logical Geometry - Seagate U Series Product Manual

U Series Family Product Manual, Rev. B

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
ST380020A, ST360010A, ST340810A and the ST320410A.

1.1 Formatted capacity

Drive Model Formatted Gbytes
ST380020A
ST360020A
ST340810A
ST320410A

1.1.1 Default logical geometry

CHS Mode Cylinders
ST380020A 16,383
ST360020A 16,383
ST340810A 16,383
ST320410A 16,383
LBA Mode
When addressing drive in LBA mode, all blocks (sectors) are consecu-
tively numbered from 0 to n–1, where n is the number of guaranteed
sectors as defined above .
Guaranteed
sectors
80 156,301,488
60 117,231,408
40 78,165,360
20 39,102,336
Read/Write heads
16
16
16
16
5
Bytes per
sector
512
512
512
512
Sectors per track
63
63
63
63