Formatted Capacity; Default Logical Geometry; Physical Organization; Recording And Interface Technology - Seagate LD25 - Series 20 GB Hard Drive Product Manual

2.2

Formatted capacity

Model Formatted capacity*
ST9402115AS 40 Gbytes
ST920217AS 20 Gbytes
*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environ-
ment and formatting.
2.3

Default logical geometry

Cylinders Read/write heads
16,383 16
LBA mode
When addressing these drives 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.
2.4

Physical organization

Drive model Read/write heads
ST9402115AS 2
ST920217AS 1
2.5

Recording and interface technology

Interface
Recording density BPI (bits/inch max)
Track density TPI (tracks/inch max)
2
Areal density (Gbits/inch
Spindle speed (RPM) (± 0.2%)
Maximum Internal transfer rate (Mbytes/sec)
I/O data-transfer rate (Mbytes/sec max)
Interleave
Cache buffer
LD25 Series SATA Product Manual, Rev. C
Guaranteed sectors
82,443,600
41,021,800
Sectors per track
63
Number of discs
1
1
max)
Bytes per sector
512
512
Serial ATA (SATA)
675,900
114,000
81
5,400
57.6
150 (SATA 1.0)
1:1
2 Mbytes (2,048 kbytes)
5