Seagate ST9320320AS Momentus 5400.5 SATA Product Manual - Page 11
Drive specifications - ata cache
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2.0 Drive specifications Unless otherwise noted, all specifications are measured under ambient conditions, at 25°C, and nominal power. For convenience, the phrases the drive and this drive are used throughout this manual to indicate the ST9320320AS, ST9250320AS, ST9200321AS, ST9160310AS, ST9160310ASG, ST9120310AS, ST9120310ASG, ST980310AS and ST980310ASG models. 2.1 Specification summary table The specifications listed in this table are for quick reference. For details on specification measurement or definition, see the appropriate section of this manual. Table 1: Drive specifications Drive specification ST9320320AS ST9250320AS ST9200321AS Formatted Gbytes (512 bytes/sector)* 320 250 200 Guaranteed sectors 625,142,448 488,397,168 390,721,968 Bytes per sector 512 Physical read/write heads 4 4 or 3 3 Discs 2 2 2 Cache (Mbytes) 8 Recording density in BPI (bits/inch avg) 1,337k Track density TPI (tracks/inch avg) 190k Areal density (Gbits/inch2 avg) 254 Spindle speed (RPM) 5,400 Average latency (msec) 5.6 Internal transfer rate 830 (Mbits/sec max) I/O data transfer rate 300 (Mbytes/sec max) ATA data-transfer modes supported SATA 1.0, Serial ATA Revision 2.6 PIO modes 0-4 Multiword DMA modes 0-2 Ultra DMA modes 0-6 Height (max) 9.5 +/- 0.2 mm (0.374 +/- .0078 inches) Width (max) 69.85 mm (2.75 +/- 0.0098 inches) Length (max) 100.5 +/- 0.25 mm (3.957 +/- 0.010 inches) Weight (max) 98.8 grams (0.218 lb) Power-on to ready (sec typical) 3.4 Standby to ready (sec typical) 3.2 ST9160310AS ST9120310AS ST980310AS ST9160310ASG ST9120310ASG ST980310ASG 160 120 80 312,581,808 234,441,648 156,301,488 2 2 1 1 1 1 93.5 grams (0.206 lb) Momentus 5400.5 SATA Product Manual, Rev. B 3