Product manual

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