Seagate ST9250412AS Momentus 7200.4 SATA Product Manual - Page 9

Drive specifications

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2.0 Drive specifications Unless otherwise noted, all specifications are measured under ambient conditions, at 25°C, and nominal power. 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 GB (512 bytes/sector)* Guaranteed sectors Bytes per sector Physical read/write heads Discs Cache (Mbytes) Recording density in BPI (max) Track density TPI (max) Areal density (Gb/in2 max) Spindle speed (RPM) Average latency (msec) Internal transfer rate (Gb/s max) I/O data transfer rate (Gb/s max) ATA data-transfer modes supported Height (max) Width (max) Length (max) Weight (max) Power-on to ready (sec typical) Standby to ready (sec typical) Track-to-track seek time, read (ms typical) Average seek, read (ms typical) Average seek, write (ms typical) Startup current, +5V (max) Seek power (typical) ST9500420AS ST9320423AS ST9250410AS ST9160412AS ST9120410AS ST980412AS ST9500420ASG ST9320423ASG ST9250410ASG ST9160412ASG ST9120410ASG ST980412ASG 500 320 250 160 120 80 976,773,168 512 4 625,142,448 3/4 488,397,168 2 312,581,808 2 234,441,648 1/2 156,301,488 1 2 2 1 1 1 1 16 1490k 265k 394 7200 4.17 1.23 3.0 SATA 1.0, Serial ATA Revision 2.6 PIO modes 0-4 Multiword DMA modes 0-2 Ultra DMA modes 0-6 9.5 +/- 0.2 mm (0.370 +/- .008 in) 69.85 +/- 0.25 mm (2.750 +/- 0.010 in) 100.35 +0.20 / -0.25 mm (3.951 +0 .008 / -0.010 in) 110 grams (0.238 lb) 105 grams (0.227 lb) 4.5 3.0 1.5 11.0 13.0 1.0 amps 2.2 watts Momentus 7200.4 SATA Product Manual, Rev. C 3

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Momentus 7200.4 SATA Product Manual, Rev. C
3
2.0
Drive specifications
Unless otherwise noted, all specifications are measured under ambient conditions, at 25°C, and nominal
power.
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
ST9500420AS
ST9500420ASG
ST9320423AS
ST9320423ASG
ST9250410AS
ST9250410ASG
ST9160412AS
ST9160412ASG
ST9120410AS
ST9120410ASG
ST980412AS
ST980412ASG
Formatted GB (512 bytes/sector)*
500
320
250
160
120
80
Guaranteed sectors
976,773,168
625,142,448
488,397,168
312,581,808
234,441,648
156,301,488
Bytes per sector
512
Physical read/write heads
4
3/4
2
2
1/2
1
Discs
2
2
1
1
1
1
Cache (Mbytes)
16
Recording density in BPI (max)
1490k
Track density TPI (max)
265k
Areal density (Gb/in
2
max)
394
Spindle speed (RPM)
7200
Average latency (msec)
4.17
Internal transfer rate (Gb/s max)
1.23
I/O data transfer rate (Gb/s max)
3.0
ATA data-transfer modes supported
SATA 1.0, Serial ATA Revision 2.6
PIO modes 0–4
Multiword DMA modes 0–2
Ultra DMA modes 0–6
Height (max)
9.5 +/- 0.2 mm (0.370 +/- .008 in)
Width (max)
69.85 +/- 0.25 mm (2.750 +/- 0.010 in)
Length (max)
100.35 +0.20 / -0.25 mm (3.951 +0 .008 / -0.010
in)
Weight (max)
110 grams (0.238 lb)
105 grams (0.227 lb)
Power-on to ready (sec typical)
4.5
Standby to ready (sec typical)
3.0
Track-to-track seek time, read
(ms typical)
1.5
Average seek, read (ms typical)
11.0
Average seek, write (ms typical)
13.0
Startup current, +5V (max)
1.0 amps
Seek power (typical)
2.2 watts