Physical Organization; Recording And Interface Technology; Physical Characteristics - Seagate Momentus 5400.4 ST9120817AS Product Manual

2.4

Physical organization

Drive model
ST9250827AS
ST9200827AS
ST9160827AS
ST9120817AS
2.5

Recording and interface technology

Interface
Recording method
Recording density BPI (bits/inch max)
Track density TPI (tracks/inch max)
2
Areal density (Gbits/inch
Spindle speed (RPM) (± 0.2%)
Internal transfer rate (Mbits/sec, max)
Sustained transfer rate (Mbytes/sec, max)
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
ST9250827AS
ST9200827AS
ST9160827AS
ST9120817AS
6
Read/write heads
4
4
3
2
max)
9.5 +/-0.2
0.374 +/-0.0078
69.85 +/-0.25
2.75 +/-0.0098
100.20 +/-0.25
3.945 +/-0.010
102 grams
0.23 pounds
97 grams
0.21 pounds
Number of discs
2
2
2
1
Serial ATA (SATA)
Perpendicular
1,180k
173k
204
5,400
778
58
300
1:1
8 Mbytes (8,192 kbytes)
Momentus 5400.4 SATA Product Manual, Rev. A