2
Barracuda ATA III Family Product Manual, Rev. B
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.
Drive Specification ST340824A ST330620A ST320414A ST315310A ST310215A
Formatted Gbytes
(512 bytes/sector)
40.0
30.0
20.0
15.3
10.2
Guaranteed sectors
78,165,360
58,633,344
39,102,336
29,888,820
19,925,880
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)
470,000
Track density
TPI (tracks/inch)
31,700
Areal density
(Mbits/inch
2
max)
14,900
Spindle speed
(RPM)
7,200
Internal data-
transfer rate
(Mbits/sec max)
500
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
2 Mbytes
Height (mm max)
26.1
Width (mm max)
101.8
Length (mm max)
147.0
Weight (typical)
554 grams (1.2 lb)
