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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 221
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