Specification summary table – Seagate ULTRA ATA ST320423A User Manual
Page 10
2
U10 Family Product Manual, Rev. A
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
ST320423A
ST315323A
ST310212A
Guaranteed Mbytes (
×
10
6
bytes)
20,485
15,364
10,242
Guaranteed sectors
40,011,300
30,008,475
20,005,650
Bytes per sector
512
Default sectors per track
63
Default read/write heads
16
16
16
Default cylinders
16,383
16,383
16,383
Physical read/write heads
4
3
2
Discs
2
2
1
Recording density
BPI (bits/inch max)
396,067
Track density
TPI (tracks/inch)
20,107
Areal density
(Mbits/inch
2
max)
7,964
Spindle speed (RPM)
5,400
Internal data-transfer rate (Mbits/
sec max)
308
I/O data-transfer rate (Mbytes/
sec max)
66.6
ATA data-transfer modes
supported
PIO modes 0–4
Multiword DMA modes 0–2
Ultra DMA modes 0–4
Cache buffer (Kbytes)
512
Height (mm max)
26.1
Width (mm max)
101.85
Length (mm max)
147.0
Weight (typical)
544 grams (1.2 lb)
Track-to-track seek time
(msec typical)
1.5 (read) 2.1 (write)
Average seek time (msec typical)
8.9