Seagate ST980813AS Momentus 7200.2 SATA Product Manual - Page 12
Physical organization, Recording and interface technology, Physical characteristics
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2.4 Physical organization Drive model ST9200420AS and ST9200420ASG ST9160823AS and ST9160823ASG ST9120823AS ST9100821AS ST980813AS and ST980813ASG Read/write heads 4 3 2 Number of discs 2 1 2.5 Recording and interface technology Interface Recording density BPI (bits/inch max) Track density TPI (tracks/inch max) Areal density (Gbits/inch2 max) Spindle speed (RPM) (± 0.2%) Maximum Internal transfer rate (Mbits/sec) Sustained transfer rate OD (Mbytes/sec max) I/O data-transfer rate (Mbytes/sec max) Interleave Cache buffer 200 GB models 160 - 80 GB models Serial ATA (SATA) 1,014,000 853,000 162,600 155,000 169.4 131 7,200 850 711 69.5 59 300 (can also be configured for 150MB/s operation) 1:1 16 Mbytes (16,384 kbytes) 8 Mbytes (8,192 kbytes) 2.6 Physical characteristics Drive specification Height (mm) (inches) Width (mm) (inches) Length (mm) (inches) Typical weight (grams) (pounds) 9.5 +/-0.2 0.374 +/-0.0078 69.85 +/-0.25 2.75 +/-0.00984 100.5+/- 0.25 3.957 +/- 0.00984 115 grams (0.254 lb) 6 Momentus 7200.2 SATA Product Manual, Rev. D