Physical Organization; Recording And Interface Technology; Physical Characteristics - Seagate Momentus 5400.2 SATA ST9120821AS Product Manual

2.4

Physical organization

Drive model
ST9120821AS
ST9100824AS
ST98823AS
ST96812AS
ST94813AS
ST93811AS
2.5

Recording and interface technology

Interface
Recording method
Recording density BPI (bits/inch max)
Track density TPI (tracks/inch max)
2
Areal density (Mbits/inch
Spindle speed (RPM) ( 0.2%)
Maximum Internal transfer rate (Mbytes/sec)
I/O data-transfer rate (Mbytes/sec max)
Interleave
Cache buffer
2.6

Physical characteristics

Drive specification
Height (mm)
(inches)
Width (mm)
(inches)
Length (mm)
(inches)
Typical weight (grams)
(pounds)
6
max)
9.5 +/-0.2
0.374 +/-0.0078
69.85 +/-0.25
2.75 +/-0.0098
100.5 +/-1.6
3.945 +/-0.0098
100
0.22
Read/write heads
4
4
3
2
2
1
Serial ATA (SATA)
16/17 EPRML
778k
126k
98.2
5,400
42
150 (SATA 1.0)
1:1
8 Mbytes (8,192 kbytes)
Momentus 5400.2 SATA Product Manual, Rev. A
Number of discs
2
2
2
1
1
1