Seagate ST9250412AS Momentus 7200 FDE.2 SATA Product Manual - Page 10

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 definition, see the appropriate section of this manual. Table 2: Drive specifications Drive specification ST9500426ASG ST9500422AS ST9500421AS ST9320427ASG ST9320426ASG ST9320426AS ST9250464ASG ST9250414ASG ST9250412AS ST9250411AS Formatted Gbytes (512 bytes/sector)* 500 320 250 Guaranteed sectors 976,773,168 625,142,448 488,397,168 Bytes per sector 512 Physical read/write heads 4 3/4 2 Discs 2 2 1 Cache (Mbytes) 16 Recording density in BPI (bits/inch max) 1,490k Track density TPI (tracks/inch max) Areal density (Gbits/inch2 max) 265k 394 Spindle speed (RPM) 7.200 Internal transfer rate (Gbits/sec max) 1.23 I/O data transfer rate (Gbits/sec max) 3.0 ATA data-transfer modes supported SATA 1.5/3.0, Serial ATA Revision 2.6 PIO modes 0-4 Multiword DMA modes 0-2 Ultra DMA modes 0-6 Height (max) 9.4 +/- 0.2 mm (0.371 +/- .008 inches) Width (max) 69.85 +/- .25 mm (2.750 +/- .010 inches) Length (max) 100.35 +0.20 / -0.25 mm (3.951 +.008 / -.010 inches) Weight (typical) 110 grams (0.238 lb) Average latency (msec) 4.17 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 ST9160419ASG ST9160418ASG ST9160413AS 160 312,581,808 2 1 105 grams (0.227 lb) 4 Momentus 7200 FDE.2 SATA Product Manual, Rev. B

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4
Momentus 7200 FDE.2 SATA Product Manual, Rev. B
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 2:
Drive specifications
Drive specification
ST9500426ASG
ST9500422AS
ST9500421AS
ST9320427ASG
ST9320426ASG
ST9320426AS
ST9250464ASG
ST9250414ASG
ST9250412AS
ST9250411AS
ST9160419ASG
ST9160418ASG
ST9160413AS
Formatted Gbytes (512 bytes/sector)*
500
320
250
160
Guaranteed sectors
976,773,168
625,142,448
488,397,168
312,581,808
Bytes per sector
512
Physical read/write heads
4
3/4
2
2
Discs
2
2
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
Internal transfer rate (Gbits/sec max)
1.23
I/O data transfer rate (Gbits/sec max)
3.0
ATA data-transfer modes supported
SATA 1.5/3.0, Serial ATA Revision 2.6
PIO modes 0–4
Multiword DMA modes 0–2
Ultra DMA modes 0–6
Height (max)
9.4 +/- 0.2 mm (0.371 +/- .008 inches)
Width (max)
69.85 +/- .25 mm (2.750 +/- .010 inches)
Length (max)
100.35 +0.20 / -0.25 mm (3.951 +.008 / -.010 inches)
Weight (typical)
110 grams (0.238 lb)
105 grams (0.227 lb)
Average latency (msec)
4.17
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