Seagate ST9250412AS Momentus 7200.2 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 ST9200420ASG, ST9200420AS, ST9160823AS, ST9160823ASG, ST9120823AS, ST9100821AS, ST980813AS and ST980813ASG 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 Default sectors per track Default read/write heads Default cylinders Physical read/write heads Discs Recording density in BPI (bits/inch max) Track density TPI (tracks/inch max) Areal density (Gbits/inch2 max) Spindle speed (RPM) Internal transfer rate (Mbits/sec max) Sustained transfer rate OD (Mbytes/sec) I/O data transfer rate (Gb/s max) ATA data-transfer modes supported Cache buffer (Mbytes) Height (max) Width (max) Length (max) Weight (max) Average latency (msec) Power-on to ready (typical) ST9200420ASG ST9160823AS ST980813AS ST9200420AS ST9160823ASG ST9120823AS ST9100821AS ST980813ASG 200 160 120 390,721,968 312,581,808 234,441,648 512 63 16 16,383 4 3 2 2 1,014,000 853,000 162,600 155,000 169.4 131 7,200 850 711 69.5 59 3.0 (can also be configured for 1.5Gb/s operation) SATA-1 PIO modes 0-4 Multiword DMA modes 0-2 Ultra DMA modes 0-5 16 8 9.5 +/- 0.2 mm (0.374 +/- .0078 inches) 69.85 mm +/- 0.25 mm (2.75 +/- 0.00984 inches) 100.5 +/- 0.25 mm (3.957 +/- +/- 0.00984 inches) 115 grams (0.254 lb) 4.17 msec 4 seconds 100 195,371,568 3 2 80 156,301,488 2 1 Momentus 7200.2 SATA Product Manual, Rev. E 3

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Momentus 7200.2 SATA Product Manual, Rev. E
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
ST9200420ASG,
ST9200420AS,
ST9160823AS,
ST9160823ASG,
ST9120823AS,
ST9100821AS,
ST980813AS and ST980813ASG 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
ST9200420ASG
ST9200420AS
ST9160823AS
ST9160823ASG
ST9120823AS
ST9100821AS
ST980813AS
ST980813ASG
Formatted Gbytes (512 bytes/sector)*
200
160
120
100
80
Guaranteed sectors
390,721,968
312,581,808
234,441,648
195,371,568
156,301,488
Bytes per sector
512
Default sectors per track
63
Default read/write heads
16
Default cylinders
16,383
Physical read/write heads
4
3
3
2
Discs
2
2
2
1
Recording density in BPI (bits/inch max)
1,014,000
853,000
Track density TPI (tracks/inch max)
162,600
155,000
Areal density (Gbits/inch
2
max)
169.4
131
Spindle speed (RPM)
7,200
Internal transfer rate (Mbits/sec max)
850
711
Sustained transfer rate OD (Mbytes/sec)
69.5
59
I/O data transfer rate (Gb/s max)
3.0 (can also be configured for 1.5Gb/s operation)
ATA data-transfer modes supported
SATA-1
PIO modes 0–4
Multiword DMA modes 0–2
Ultra DMA modes 0–5
Cache buffer (Mbytes)
16
8
Height (max)
9.5 +/- 0.2 mm (0.374 +/- .0078 inches)
Width (max)
69.85 mm +/- 0.25 mm (2.75 +/- 0.00984 inches)
Length (max)
100.5 +/- 0.25 mm (3.957 +/- +/- 0.00984 inches)
Weight (max)
115 grams (0.254 lb)
Average latency (msec)
4.17 msec
Power-on to ready (typical)
4 seconds