Drive Specifications; Specification Summary - Seagate ST9120824A - Momentus 4200.2 120 GB Hard Drive Product Manual

2.0

Drive specifications

Unless otherwise noted, all specifications are measured under ambient conditions, at 25°C, and nominal
power. For convenience, the phrases the drive and this drive are used throughout this manual to indicate
ST9120824A, ST9100825A, ST980829A, ST960812A, ST9402112A, and ST930218A model drives.
2.1

Specification summary

The specifications listed in this table are for quick reference. For details on specification measurement or
definition, see the appropriate section of this manual.
Table 1: Specifications
Drive specification
Formatted Gbytes
(512 bytes/sector)
Guaranteed sectors
Bytes per sector
Physical read/write heads
Discs
Cache (Mbytes)
Recording density, BPI
(bits/inch typical)
Track density. TPI
(tracks/inch typical
Areal density
2
(Gbits/inch max)
Spindle speed (RPM)
Internal data transfer rate OD
(Mbytes/sec max)
I/O data-transfer rate
(Mbytes/sec max)
ATA data-transfer
modes supported
Height
Width
Length
Weight (typical)
Average latency (msec)
Power-on to ready
(sec typical)
Standby to ready (sec typical)
Startup current 5V (typical)
Track-to-track seek time
(msec typical)
Momentus 4200.2 Product Manual, Rev. A
ST9120824A ST9100825A ST980829A
120 100
234,441,648 195,371,568
512
4 4
2 2
8
778k
126k
98.2
4,200 RPM-class performance (actual spin speed: 5,400 RPM)
37
100
PIO modes 0–4; Multiword DMA modes 0–2; Ultra DMA modes 0–5
9.5 +/–0.2 mm (0.374 +/–.008 inches)
69.85 +/–0.25 mm (2.750 +/–0.010 inches)
100.2 +/–0.25 mm (3.945 +/–0.010 inches)
100 grams (0.22 lb)
5.6
3.5
3.0
1.0 amps
1.0 (read), 1.5 (write)
ST960812A
80 60
156,301,488 117,210,240
3 2
2 1
ST9402112A ST930218A
40 30
78,140,160 58,605,120
2 1
1 1
3