Drive Specifications; Formatted Capacity; Default Logical Geometry; Supported Chs Translation Geometries - Seagate MARATHON 1680 Product Manual

Marathon 2250 and Marathon 1680 Product Manual

1.0 Drive specifications

Unless otherwise noted, all specifications are measured under ambient
conditions, at 40°C, at sea level and nominal power.

1.1 Formatted capacity

Guaranteed Kbytes
Guaranteed sectors
(LBA mode)
Bytes per sector
Note. DOS systems are not able to access more than 528 Mbytes unless:
1) the host system supports and is configured for LBA addressing
or for extended CHS addressing, or 2) the host system contains a
specialized drive controller, or 3) the host system runs BIOS trans-
lation software. In addition, older BIOSs cannot address more than
2.1 Gbytes (more than 4,096 cylinders) on a single partition. If you
encounter this problem with the ST92255AG, divide the drive into
two partitions or upgrade your BIOS. Please contact your Seagate
representative for additional information.

1.1.1 Default logical geometry

CHS Mode
Sectors per track
Read/write heads
Cylinders
LBA Mode
When addressing either drive in LBA mode, all blocks (sectors) are
consecutively numbered from 0 to n – 1.

1.1.2 Supported CHS translation geometries

The Marathon 2250 supports any translation geometry that satisfies all
of the following conditions:
Sectors per track 63
Read/write heads 16
(Sectors per track) (read/write heads)
Marathon 2250 Marathon 1680
2,250,209 1,680,634
4,394,940 3,282,490
512 512
Marathon 2250 Marathon 1680
63 63
16 16
4,360 3,256
(cylinders)
5
4,394,880