2.2
Formatted capacity
Model
Formatted capacity*
ST9402115A
40 Gbytes
ST920217A
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
Model
Read/write heads
ST9402115A
2
ST920217A
1
2.5
Recording and interface technology
Interface
Recording density BPI (bits/inch typical)
Track density TPI (tracks/inch typical)
2
Areal density (Gbits/inch
Spindle speed (RPM) (± 0.2%)
Internal data-transfer rate OD (Mbytes/sec max)
I/O data-transfer rate (Mbytes/sec max)
Interleave
Cache buffer
LD25 Series PATA 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
Parallel ATA
675,900
114,000
81
5,400
57.6
100 (Ultra DMA mode 5)
1:1
2 Mbytes (2,048 kbytes)
5