Seagate ST9250412AS Momentus 7200.3 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. For convenience, the phrases the drive and this drive are used throughout this manual to indicate the ST9320421AS, ST9320421ASG, ST9250421AS, ST9250421ASG, ST9200421AS, ST9200423ASG, ST9160411AS, ST9160411ASG, ST9120411AS, ST9120411ASG, ST980411AS and ST980411ASG models. 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) ST9320421AS ST9320421ASG 320 ST9250421AS ST9250421ASG 250 ST9200421AS ST9200423ASG 200 625,142,448 512 4 2 16 1,334k 488,397,168 3 2 390,721,968 3 2 190k 253 7,200 4.17 1.1 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 (0.374 +/- .0078 inches) 69.85 +/- 0.249 mm (2.75 +/- 0.0098 inches) 100.3 +/- 0.25 mm (3.95 +/- .010 inches) 110 grams (0.238 lb) 4.0 ST9160411AS ST9160411ASG 160 ST9120411AS ST9120411ASG 120 312,581,808 234,441,648 2 2 1 1 105 grams (0.227 lb) ST980411AS ST980411ASG 80 156,301,488 1 1 Momentus 7200.3 SATA Product Manual, Rev. C 3

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Momentus 7200.3 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. For convenience, the phrases
the drive
and
this drive
are used throughout this manual to indicate the
ST9320421AS,
ST9320421ASG,
ST9250421AS,
ST9250421ASG,
ST9200421AS,
ST9200423ASG,
ST9160411AS, ST9160411ASG,
ST9120411AS, ST9120411ASG, ST980411AS and ST980411ASG 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
ST9320421AS
ST9320421ASG
ST9250421AS
ST9250421ASG
ST9200421AS
ST9200423ASG
ST9160411AS
ST9160411ASG
ST9120411AS
ST9120411ASG
ST980411AS
ST980411ASG
Formatted Gbytes
(512 bytes/sector)*
320
250
200
160
120
80
Guaranteed sectors
625,142,448
488,397,168
390,721,968
312,581,808
234,441,648
156,301,488
Bytes per sector
512
Physical read/write heads
4
3
3
2
2
1
Discs
2
2
2
1
1
1
Cache (Mbytes)
16
Recording density in BPI
(bits/inch max)
1,334k
Track density TPI
(tracks/inch max)
190k
Areal density
(Gbits/inch
2
max)
253
Spindle speed (RPM)
7,200
Average latency (msec)
4.17
Internal transfer rate
(Gbits/sec max)
1.1
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 (0.374 +/- .0078 inches)
Width (max)
69.85 +/- 0.249 mm (2.75 +/- 0.0098 inches)
Length (max)
100.3 +/- 0.25 mm (3.95 +/- .010 inches)
Weight (max)
110 grams (0.238 lb)
105 grams (0.227 lb)
Power-on to ready
(sec typical)
4.0