Product manual

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 86432
Discs 43221
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