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U Series 9 Product Manual, Rev. C
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 ST3160022A,
ST3120025A, and ST380012A model drives.
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.
Drive specification
Formatted Gbytes
(512 bytes/sector)
Guaranteed sectors
Bytes per sector
Default sectors per track
Default read/write heads
Default cylinders
Physical read/write heads
Discs
Recording density
BPI (bits/inch max)
Track density TPI
(tracks/inch max)
Areal density
2
(Mbits/inch
max)
Sustained data transfer rate OD (Mbytes/sec)
I/O data-transfer rate (Mbytes/sec max)
ATA data-transfer modes supported
Cache buffer
Height (mm max)
Width (mm max)
Length (mm max)
Weight (typical)
ST3160022A
ST3120025A
160
120
312,581,808
234,441,648
4
2
PIO modes 0–4
Multiword DMA modes 0–2
Ultra DMA modes 0–5
1 Mbytes
26.035 mm (1.028 inches)
101.6 mm (4.000 inches)
146.99 mm (5.787 inches)
635 grams (1.4 lb)
ST380012A
80
156,301,488
512
63
16
16,383
3
2
595,000
94,600
56.3
48
100
3
2
1
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