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Barracuda 7200.7 Serial ATA Product Manual, Rev. C 5

2.0 Drive specifications

Unless otherwise noted, all specifications are measured under ambient con-

ditions, at 25°C, and nominal power. For convenience, the phrases the drive

and this drive are used throughout this manual to indicate the ST3160023AS,

ST3160021AS, ST3120026AS, ST3120022AS, ST380013AS, ST380011AS

and ST340014AS models.

2.1 Specification summary table

The specifications listed in this table are for quick reference. For details on

specification measurement or definition, see the appropriate section of this

manual.

Table 1: Drive specifications

Drive specification

ST3160023AS

ST3160021AS

ST3120026AS

ST3120022AS

ST380013AS

ST380011AS ST340014AS

Formatted Gbytes

(512 bytes/sector)

160 120 80 40

Guaranteed sectors

312,581,808 234,441,648 156,301,488 78,165,360

Bytes per sector

512

Default sectors per

track

Default read/write

heads

Default cylinders

16,383

Physical read/write

heads

4321

Discs

2211

Recording density in

BPI (bits/inch max)

595,000

Track density TPI

(tracks/inch max)

94,600

Areal density

(Mbits/inch

max)

56.3

Spindle speed (RPM)

7,200