Seagate ST380012ACE Product Manual - Page 13

Drive specifications - buffer

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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 ST3160022ACE, ST3120025ACE, and ST380012ACE 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, (Mbits/inch2 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) Average latency (msec) Power-on to ready (sec typical) Standby to ready (sec typical) Startup current (typical) 12V (peak) Track-to-track seek time (msec typical) Average seek, read (msec typical) Average seek, write (msec typical) Seek power (typical) ST3160022ACE ST3120025ACE 160 312,581,808 512 63 120 234,441,648 16 16,383 4 3 2 2 595,000 94,600 56.3 48 100 PIO modes 0-4 Multiword DMA modes 0-2 Ultra DMA modes 0-5 2 Mbyte (2,048 kbytes) 26.035 mm (1.028 inches) 101.6 mm (4.000 inches) 146.99 mm (5.787 inches) 635 grams (1.4 lb) 4.16 10 sec 10 sec 2.3 amps

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U Series 9 ce Product Manual, Rev. F
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
ST3160022ACE, ST3120025ACE, and ST380012ACE 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
ST3160022ACE
ST3120025ACE
ST380012ACE
Formatted Gbytes (512 bytes/sector)
160
120
80
Guaranteed sectors
312,581,808
234,441,648
156,301,488
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
Discs
2
2
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
Sustained data transfer rate OD (Mbytes/sec)
48
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 Mbyte (2,048 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)
Average latency (msec)
4.16
Power-on to ready (sec typical)
10 sec
Standby to ready (sec typical)
10 sec
Startup current (typical) 12V (peak)
2.3 amps
Track-to-track seek time (msec typical)
<1.0 (read), <1.2 (write)
Average seek, read (msec typical)
8.5
Average seek, write (msec typical)
9.5
Seek power (typical)
10.3 watts