DB35.3 Series Serial ATA Product Manual, Rev. D
13
2.4 Recording and interface tech no logy 2.5 Physical characteristics
750GB 500GB 400GB 320GB 300GB 250GB
Interface Serial ATA (SATA)
Recording method Perpendicular
Recording density, KBPI (kbits/inch max) 926 813 781 813
Track density, KTPI (ktracks/inch avg) 145
Areal density (Gbits/inch2 avg) 128.2 114.4
Spindle speed (RPM) (± 0.2%) 7,200
Internal data transfer rate (Mbits/sec max) 1,030
Sustained data transfer rate (Mbytes/sec max) 78 72
I/O data-transfer rate (Mbytes/sec max) 300 (Ultra DMA mode 5)
Drive specification
Maximum height
(mm)
(inches) 26.1
1.028
Maximum width
(mm)
(inches) 101.6
4.000 +/- 0.010
Maximum length
(mm)
(inches) 146.99
5.787
Typical weight
ST3320820SCE, ST3300820SCE and ST3250820SCE
ST3500830SCE and ST3400820SCE
ST3750640SCE and ST3750840SCE
580 grams (1.28 lbs)
635 grams (1.40 lbs)
720 grams (1.59 lbs)
Cache Size
ST3750640SCE
ST3750840SCE
ST3500830SCE
ST 3400820SCE
ST3320820SCE
ST3300820SCE
ST3250820SCE
16 Mbytes
8 Mbytes