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14 Barracuda SATA Product Manual, Rev. B
Drive Specifications www.seagate.com
*One GB equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment and
formatting.
**During periods of drive idle, some offline
activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and power
to operational levels.
Warranty To determine the warranty for a specific drive, use a web browser to access the following web
page:
support.seagate.com/customer/warranty_validation.jsp
From this page, click on the “Verify Your Warranty” link. You will be asked to provide the drive
serial number, model number (or part number) and country of purchase. The system will dis-
play the warranty information for your drive.
Contact start-stop cycles 50,000 at 25°C, 50% rel. humidity 50,000 at 25°C, 50% rel. humidity
Supports Hotplug operation per the
Se
rial ATA Revision 2.5 specification
Yes Yes
Table 3 Drive specifications summary for 250GB and 160GB models
Drive Specification
ST3250312AS ST3160316AS
Formatted capacity (512 bytes/sector)* 250GB 160GB
Guaranteed sectors 488,397,168 312,581,808
Heads 1 1
Disks 1 1
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 (max.) 1413kb/in 1413kb/in
Track density (avg.) 236 ktracks/in 236 ktracks/in
Areal density (avg.) 329Gb/in
2
329Gb/in
2
Spindle speed 7200 RPM 7200 RPM
Internal data transfer rate (max.) 1695Mb/s 1695Mb/s
Sustained data transfer
rate OD (max.) 125MB/s 125MB/s
I/O data-transfer rate 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 8MB 8MB
Height (max.) 19.98mm / 0.787 in 19.98mm / 0.787 in
Width (max.) 101.6mm / 4.0 in (
+ 0.010 in) 101.6mm / 4.0 in ( + 0.010 in)
Length (max.) 146.99mm / 5.787 in 146.99mm / 5.787 in
Weight (typical) 415g / 0.915 lb 415g / 0.915 lb
Average latency 4.16ms 4.16ms
Power-on to ready (max.) <8.5s <8.5s
Standby to ready (max.) <8.5s <8.5s
Track-to-track seek time (typical) <1.0ms (read)
<1.2ms (write)
<1.0ms (read)
<1.2ms (write)
Average seek, read (typical)
Average seek, write (typical)
<8.5ms (read)
<9.5ms (write)
<8.5ms (read)
<9.5ms (write)
Startup current (typical) 12V (peak) 2.0A 2.0A
Voltage tolerance (including noise) 5V +10% / -7.5%
12V +10% / -7.5%
5V +10% / -7.5%
12V +10% / -7.5%
Ambient temperature 0° to 60°C (operating)
–40° to 70°C (non-operating)
0° to 60°C (operating)
–40° to 70°C (non-operating)
Temperature gradient (max.) 20°C per hour (operating)
30°C per hour (non-operating)
20°C per hour (operating)
30°C per hour (non-operating)
Table 2 Drive specifications summary for 500GB and 320 models (continued)
Drive Specification
ST3500413AS ST3320413AS