Seagate Barracuda 7200.8 Serial ATA Product Manual page 14

Table 3: Drive specifications for 250 and 200 Gbyte models
Drive specification
Formatted Gbytes (512 bytes/sector)*
Guaranteed sectors
Bytes per sector
Default sectors per track
Default read/write heads
Default cylinders
Recording density in BPI (bits/inch max)
Track density TPI (tracks/inch avg)
2
Areal density (Mbits/inch
Spindle speed (RPM)
Internal data transfer rate (Mbytes/sec max)
Sustained transfer rate OD (Mbytes/sec)
I/O data transfer rate (Mbytes/sec max)
ATA data-transfer modes supported
SATA data-transfer modes supported
Cache buffer
Height (max)
Width (max)
Length (max)
Weight (max) grams / lb.
Average latency (msec)
Power-on to ready (typical)
Standby to ready (typical)
Track-to-track seek time (msec typical)
Average seek, read (msec typical)
Average seek, write (msec typical)
Startup current (typical) 12V (peak)
Voltage tolerance
(including noise)
Ambient temperature
Temperature gradient
(°C per hour max)
Relative humidity
Relative humidity gradient
8
avg)
ST3250823AS ST3250623AS
250
488,397,168
512
63
16
16,383
763,000
120,000
91,560
7,200
95
65
150
PIO modes 0–4
Multiword DMA modes 0–2
Ultra DMA modes 0–6
1.5 Gbits/sec
8 Mbytes 16 Mbytes
26.11 mm (1.028 inches)
101.85 mm (4.010 inches)
146.99 mm (5.787 inches)
635 / 1.39
4.16
10 sec
10 sec
0.8 (read), 1.0 (write)
8.0
9.0
2.8 amps
5V ± 5%
12V ± 10%
0° to 60°C (op.)
–40° to 70°C (nonop.)
20°C (operating)
30°C (nonoperating)
5% to 90% (operating)
5% to 95% (nonoperating)
30% per hour max
Barracuda 7200.8 Serial ATA Product Manual, Rev. F
ST3200826AS
200
390,721,968
8 Mbytes