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10 Barracuda XT SATA Product Manual, Rev. D
Drive Specifications www.seagate.com
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 following
drive models:
The specification summaries listed in the following tables are for quick reference. For details on specification
measurement or definition, see the appropriate section of this manual.
ST33000651AS ST32000641AS
Table 1 Drive specifications summary for 3000GB and 2000GB models
Drive specification ST33000651AS ST32000641AS
Formatted capacity (512 bytes/sector)* 3000GB (3TB) 2000GB (2TB)
Guaranteed sectors 5,860,533,168 3,907,029,168
Heads 10 8
Disks 5 4
Bytes per sector 512 512
Default sectors per track 63 63
Default read/write heads 16 16
Default cylinders 16,383 16,383
Recording density 1941 kb/in 1721 kb/in
Track density(avg) 270 ktracks/in 240 ktracks/in
Areal density (avg) 488Gb/in
2
347Gb/in
2
Spindle speed 7200 RPM 7200 RPM
Internal data transfer rate (max) 1900Mb/s 1300Mb/s
Sustained data transfer rate OD(max) 149MB/s 138MB/s
I/O data-transfer rate (max) 600MB/s 600MB/s
ATA data-transfer modes supported PIO modes: 0 to 4
Multiword DMA modes: 0 to 2
Ultra DMA modes 0 to 6
PIO modes: 0 to 4
Multiword DMA modes: 0 to 2
Ultra DMA modes 0 to 6
Cache buffer 64MB 64MB
Height (max) 26.1mm / 1.028 in 26.1mm / 1.028 in
Width (max) 101.85mm / 4.010 in 101.85mm / 4.010 in
Length (max) 146.99mm / 5.787 in 146.99mm / 5.787 in
Weight (typical) 700g / 1.543 lb 700g / 1.543 lb
Average latency 4.16ms 4.16ms
Power-on to ready (typical) 18s 15s
Standby to ready (typical) 18s 15s
Startup current (typical) 12V (peak) 2.0A 2.8A
Voltage tolerance (including noise) 5V + 5%
12V + 10%
5V + 5%
12V + 10%
Operating temperature
(Drive Case temperature)
0° to 60°C 0° to 60°C
Nonoperating temperature (Ambient) –40° to 70°C –40° to 70°C
Temperature gradient (max) 20°C per hour max (operating)
30°C per hour max (nonoperating)
20°C per hour max (operating)
30°C per hour max (nonoperating)
Relative humidity 5% to 95% (operating)
5% to 95% (nonoperating)
5% to 95% (operating)
5% to 95% (nonoperating)
Relative humidity gradient (max) 30% per hour 30% per hour
Wet bulb temperature (max) 37.7°C max (operating)
40.0°C max (nonoperating)
37.7°C max (operating)
40.0°C max (nonoperating)