2
Barracuda ATA 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 ST328040A
ST327270A
ST320430A ST313620A ST310220A ST36810A
Guaranteed Mbytes
(
×
10
6
bytes)
28,520
27,333
20,520
13,666
10,242
6,833
Guaranteed sectors
55,704,096
53,385,552
40,079,088
26,692,776
20,005,650 13,346,235
Bytes per sector
512
Default sectors per
track
63
Default read/write
heads
16
16
16
16
15
Default cylinders
16,383
16,383
16,383
16,383
14,123
Physical read/write
heads
8
6
4
3
2
Discs
4
3
2
2
1
Recording density
KBPI (bits/inch max)
305
Track density
TPI (tracks/inch)
16,420
Areal density
(Mbits/inch
2
max)
5,100
Spindle speed
(RPM)
7,200
Internal data-trans-
fer rate (Mbits/sec
max)
323
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
