Drive Specifications; Specification Summary Table - Seagate Momentus 5400.4 ST9120817AS 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 the
ST9250827AS, ST9200827AS, ST9160827AS, and ST9120817AS models.
2.1

Specification summary table

The specifications listed in this table are for quick reference. For details on specification measurement or defi-
nition, see the appropriate section of this manual.
Table 1: Drive specifications
Drive specification
Formatted Gbytes
(512 bytes/sector)*
Guaranteed sectors
Bytes per sector
Physical read/write heads
Discs
Cache (Mbytes)
Recording density in BPI (bits/inch max)
Track density TPI (tracks/inch max)
2
Areal density (Gbits/inch max)
Spindle speed (RPM)
Internal transfer rate (Mbits/sec max)
Sustained transfer rate (Mbytes/sec max)
I/O data transfer rate (Mbytes/sec max)
ATA data-transfer modes supported
Height (max)
Width (max)
Length (max)
Weight (typical)
Average latency (msec)
Power-on to ready (sec typical)
Standby to ready (sec typical)
Track-to-track seek time (msec typical)
Average seek, read (msec typical)
Average seek, write (msec typical)
Momentus 5400.4 SATA Product Manual, Rev. A
ST9250827AS ST9200827AS
250 200
488,397,168 390,721,968
512
4 4
2 2
8
1,180k
173k
204
5,400
778
58
300
SATA 1.0, Serial ATA Revision 2.5
PIO modes 0–4
Multiword DMA modes 0–2
Ultra DMA modes 0–6
9.5 +/- 0.2 mm (0.374 +/- .0078 inches)
69.85 +/- 0.25 mm (2.75 +/- 0.0098 inches)
100.20 +/- 0.25 mm (3.945 +/- 0.010 inches)
</=102 grams (0.23 lb)
5.6
<3.0
<2.0
<2.0 (read), <2.5 (write)
<12.0
<14.0
ST9160827AS ST9120817AS
160 120
312,581,808 234,441,648
3 2
2 1
97 grams (0.21 lb)
3