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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
Marathon 2250 Marathon 1680
Guaranteed Kbytes 2,250,209 1,680,634
Guaranteed sectors
(LBA mode)
4,394,940 3,282,490
Bytes per sector 512 512
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
Marathon 2250 Marathon 1680
Sectors per track 63 63
Read/write heads 16 16
Cylinders 4,360 3,256
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) ×
(cylinders)
≤ 4,394,880
Marathon 2250 and Marathon 1680 Product Manual 5