Seagate Barracuda ST3160021AS - Manual (Page 11)

Barracuda 7200.7 Serial ATA Product Manual, Rev. N 3
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
ST3200822AS, ST3160827AS, ST3160023AS, ST3160021AS, ST3120827AS, ST3120026AS,
ST3120022AS, ST380817AS, ST380013AS, ST380011AS, ST340111AS and ST340014AS models.
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 ST3200822AS
ST3160827AS
ST3160023AS
ST3160021AS ST3120827AS
ST3120026AS
ST3120022AS ST380817AS
ST380013AS
ST380011AS
ST340111AS
ST340014AS
Formatted Gbytes (512 bytes/sector)* 200 160 120 80 40
Guaranteed sectors 390,721,968 312,581,808 234,441,648 156,301,488 78,165,360
Bytes per sector 512
Default sectors per track 63
Default read/write heads 16
Default cylinders 16,383
Physical read/write heads 4 4 3 2 1
Discs 2 2 2 1 1
Recording density in BPI (bits/inch max) 671,500 595,000
Track density TPI (tracks/inch max) 98,000 94,600
Areal density (Gbits/inch 2 max) 68.5 56.3
Spindle speed (RPM) 7,200
Internal transfer rate (Mbytes/sec max) 85.4
Sustained transfer rate OD (Mbytes/sec) 58
I/O data transfer rate (Mbytes/sec max) 150
ATA data-transfer modes supported
SATA 1.0, SATA II
PIO modes 0–4
Multiword DMA modes 0–2
Ultra DMA modes 0–6
Cache buffer
8 Mbytes: ST3200822AS, ST3160827AS, ST3160023AS, ST3120827AS,
ST3120026AS, ST380817AS, ST380013AS and ST340111AS
2 Mbytes: ST3160021AS, ST3120022AS, ST380011AS, and ST340014AS
Height (max) 26.035 mm (1.028 inches)
Width (max) 101.6 mm (4.000 inches)
Length (max) 146.99 mm (5.787 inches)
Weight (typical) 635 grams (1.4 lb)