Seagate BARRACUDA ST31000524AS - Manual (Page 11)

Barracuda SATA Product Manual, Rev. A 11
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:
Specification summary tables
The specifications listed in the following tables are for quick reference. For details on specification measurement
or definition, see the appropriate section of this manual.
ST31000524AS ST3500413AS ST3250312AS
ST3750525AS ST3320413AS ST3160316AS
Table 1 Drive specifications summary for 1000 and 750 models
Drive specification
ST31000524AS ST3750525AS
Formatted capacity (512 bytes/sector)* 1000GB 750GB
Guaranteed sectors 1,953,525,168 1,465,149,168
Heads 4 3
Disks 2 2
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 (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
Cache buffer 32MB 32MB
Height (max.) 26.1mm / 1.028 in 26.1mm / 1.028 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) 622g /1.371 lb 622g /1.371 lb
Average latency 4.16ms 4.16ms
Power-on to ready (max.) <10.0s <10.0s
Standby to ready (max.) <10.0s <10.0s
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 typical
<9.5ms typical <8.5ms typical
<9.5ms typical
Startup current (typical) 12V (peak) 2.0A 2.0A