2 Barracuda ATA IV 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 ST380021A ST360021A ST340016A ST320011A
Formatted Gbytes
(512 bytes/sector) 80.0 60.0 40.0 20.0
Guaranteed sectors 156,301,488 117,231,408 78,165,360 39,102,336
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 1
Discs 2 2 1 1
Recording density
BPI (bits/inch max) 540,000
Track density TPI
(tracks/inch max) 58,000
Areal density
(Mbits/inch
2
max) 31,300
Spindle speed
(RPM) 7,200
Internal data-
transfer rate OD
(Mbits/sec max)
555
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) 635 grams (1.4 lb)
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