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DiamondMax 21 Serial ATA Product Manual, Rev. A
15
2.4 Recording and interface technology
2.5 Physical characteristics
Model capacity
320 250 160 80 40
Interface
Serial ATA (SATA)
Recording method
Perpendicular
Recording density (kbits/inch max)
781
813 824
Track density (ktracks/inch avg)
145 137.259
Areal density (Gbits/inch
2
avg)
114.4 101
Spindle speed (RPM)
7,200 ± 0.2%
Internal data transfer rate (Mbits/sec max)
1,030 930
Sustained data transfer rate (Mbytes/sec max)
72 78
I/O data-transfer rate (Mbytes/sec max)
300
Maximum height (200 - 320 GB models) 26.1 mm (1.028 inches)
Maximum height (40 - 160 GB models) 19.99 mm (0.787 inches)
Maximum width 101.6 mm (4.000 +/- 0.010 inches)
Maximum length 146.99 mm (5.787 inches)
Typical weight
STM3320620AS and STM3320820AS 635 grams (1.4 lbs)
STM3250824AS and STM3250820AS 600 grams (1.32 lbs)
STM3160815AS and STM3160215AS 380 grams (0.838 lbs)
STM380815AS and STM340215AS 365 grams (0.805 lbs)
Cache buffer
STM3320620AS 16 Mbytes (16,384 kbytes)
STM3320820AS, STM3250824AS, STM3250820AS, STM3160815AS
and STM380815AS
8 Mbytes (8,192 kbytes)
STM3160215AS and STM340215AS 2 Mbytes (2,048 kbytes)