6
Barracuda ATA Family Product Manual, Rev. B
1.2 Physical organization
1.3 Recording and interface technology
1.4 Physical characteristics
Drive Model
Read/Write heads (GMR)
Number of discs
ST328040A/ST327240A
8
4
ST320430A
6
3
ST313620A
4
2
ST310220A
3
2
ST36810A
2
1
Interface
ATA
Recording method
16/17 EPRML
Recording density KBPI (bits/inch)
305
Track density TPI (tracks/inch)
16,420
Areal density (Mbits/inch
2
max)
5,100
Spindle speed (RPM) (
±
0.2%)
7,200
Internal data-transfer rate
(Mbits/sec max)
323
I/O data-transfer rate
(Mbytes/sec max)
16.6 (PIO mode 4)
66.6 (Ultra DMA mode 4)
Interleave
1:1
Cache buffer (Kbytes)
512
Drive Specification
ST328040A, ST327240A, ST320430A,
ST313620A, ST310220A, ST36810A
Maximum height
(mm)
(inches)
26.1
1.028
Maximum width
(mm)
(inches)
101.8
4.020
