Seagate ST9500621SS Constellation.2 SATA Product Manual - Page 12

Table 1: Drive specifications summary for 1TB, 500 and 250 GB models Drive specification Formatted GB (512 bytes/sector)* Guaranteed sectors Heads Discs Bytes per sector Default sectors per track Default read/write heads Default cylinders Recording density, KBPI (Kb/in max) Track density, KTPI (Ktracks/in avg.) Areal density, (Gb/in2 avg) Spindle speed (RPM) Internal data transfer rate (Mb/s max) Sustained data transfer rate OD (MB/s max) I/O data-transfer rate (MB/s max) ATA data-transfer modes supported Cache buffer Weight: (maximum) Average latency Power-on to ready (sec max) Standby to ready (sec max) Track-to-track seek time (ms typical) Average seek, read (ms typical) Average seek, write (ms typical) Startup current (typical) 12V (peak) Voltage tolerance (including noise) Ambient temperature Temperature gradient (°C per hour max) Relative humidity Relative humidity gradient Wet bulb temperature (°C max) Altitude, operating Altitude, nonoperating (below mean sea level, max) Operational Shock (max at 2 ms) Non-Operational Shock (max at 2 ms) Vibration, operating Vibration, nonoperating ST91000640NS ST91000641NS ST91000642NS ST9500620NS ST9500621NS ST9500622NS 1000 500 1,953,525,168 976,773,168 8 4 4 2 512 63 16 16,383 1544 270 417 7200 1304 115 600 PIO modes 0-4 Multiword DMA modes 0-2 Ultra DMA modes 0-6 64 Mbytes 200 g (0.441 lb) 183 g (0.403 lb) 4.16 ms 20 sec 13 sec 0.23 read 0.44 write 7.5 8.5 2.0 amps 5V ±5% 12V ±5% 5° to 60°C (operating) -40° to 70°C (nonoperating) 20°C (operating) 20°C (nonoperating) 5% to 95% (operating) 5% to 95% (nonoperating) 20% per hour max 28°C -60.96 m to 3,048 m (-200 ft. to 10,000+ ft.) -60.96 m to 12,192 m (-200 ft. to 40,000+ ft.) Read 70 Gs / Write 40 Gs 400 Gs 5-500 Hz: 0.5 Gs 5-500 Hz: 3.0 Gs ST9250610NS ST9250611NS ST9250612NS 250 488,397,168 2 1 179 g (0.395 lb) 6 Constellation.2 Serial ATA Product Manual, Rev. F