Seagate ST9500420AS Momentus 7200.4 SATA Product Manual - Page 9

Drive specifications - speed

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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 definition, 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) Areal density (Gbits/inch2 max) Spindle speed (RPM) Average latency (msec) Internal transfer rate (Gbits/sec max) I/O data transfer rate (Gbits/sec 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 (msec typical) Average seek, read (msec typical) Average seek, write (msec typical) Startup current, +5V (max) Seek power (typical) ST9500420AS ST9320423AS ST9250410AS ST9160412AS ST9120410AS ST9500420ASG ST9320423ASG ST9250410ASG ST9160412ASG ST9120410ASG 500 320 250 160 120 976,773,168 512 4 625,142,448 3/4 488,397,168 2 312,581,808 2 234,441,648 1/2 2 2 1 1 1 16 1,490k 265k 394 7,200 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 inches) 69.85 +/- 0.25 mm (2.750 +/- 0.010 inches) 100.35 +0.20 / -0.25 mm (3.951 +0 .008 / -0.010 inches) 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. A 3

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Momentus 7200.4 SATA Product Manual, Rev. A
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
Formatted Gbytes (512 bytes/sector)*
500
320
250
160
120
Guaranteed sectors
976,773,168
625,142,448
488,397,168
312,581,808
234,441,648
Bytes per sector
512
Physical read/write heads
4
3/4
2
2
1/2
Discs
2
2
1
1
1
Cache (Mbytes)
16
Recording density in BPI (bits/inch max)
1,490k
Track density TPI (tracks/inch max)
265k
Areal density (Gbits/inch
2
max)
394
Spindle speed (RPM)
7,200
Average latency (msec)
4.17
Internal transfer rate (Gbits/sec max)
1.23
I/O data transfer rate (Gbits/sec 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 inches)
Width (max)
69.85 +/- 0.25 mm (2.750 +/- 0.010 inches)
Length (max)
100.35 +0.20 / -0.25 mm (3.951 +0 .008 / -0.010
inches)
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
(msec typical)
1.5
Average seek, read (msec typical)
11.0
Average seek, write (msec typical)
13.0
Startup current, +5V (max)
1.0 amps
Seek power (typical)
2.2 watts