Seagate Barracuda ST3120022A - Manual (Page 13)

Barracuda 7200.7 Product Manual, Rev. E 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
ST3160021A, ST3160023A, ST3120022A, ST3120026A, ST380011A, ST380013A, ST360014A, and
ST340014A model drives.
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.
Drive specification
ST3160021A
ST3160023A
ST3120022A
ST3120026A
ST380011A
ST380013A ST360014A ST340014A
Formatted Gbytes (512 bytes/sector) 160 120 80 60 40
Guaranteed sectors 312,581,808 234,441,648 156,301,488 117,231,408 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 3 2 2 1
Discs 2 2 1 1 1
Recording density, BPI (bits/inch max) 595,000
Track density, TPI (tracks/inch max) 94,600
Areal density, (Mbits/inch 2 max) 56.3
Spindle speed (RPM) 7,200
Internal data transfer rate OD
(Mbytes/sec max)
85.4
Sustained data transfer rate OD
(Mbytes/sec)
58
I/O data-transfer rate (Mbytes/sec max) 100
ATA data-transfer modes supported PIO modes 0–4
Multiword DMA modes 0–2
Ultra DMA modes 0–5
Cache buffer
ST3160021A, ST3120022A, ST380011A,
ST360014A, and ST340014A
ST3160023A, ST3120026A, and
ST380013A
2 Mbytes (2,048 kbytes)
8 Mbytes (8,192 kbytes)
Height (mm max) 26.035 mm (1.028 inches)
Width (mm max) 101.6 mm (4.000 inches)
Length (mm max) 146.99 mm (5.787 inches)
Weight (typical) 635 grams (1.4 lb)