Seagate ST33000651SS Constellation ES SAS Product Manual - Page 38
ST32000444SS CURRENT/POWER vs THROUGHPUT SAS, Random 8 Block Reads
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7.4 Power dissipation 2TB models in 3Gb operation Please refer to Table 2 for power dissipation numbers. To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 4). Locate the typical I/O rate for a drive in your system on the horizontal axis and read the corresponding +5 volt current, +12 volt current, and total watts on the vertical axis. To calculate BTUs per hour, multiply watts by 3.4123. ST32000444SS CURRENT/POWER vs THROUGHPUT (SAS - 3.0GB) Random 8 Block Reads 1.0 10 5Volt A 0.9 9 12 Volt A Watts 0.8 8 0.7 peres 0.6 0.5 m A 0.4 7 Pow 6 5 4 er(w atts) 0.3 3 0.2 2 0.1 1 0.0 0 20 40 0 60 80 100 120 140 160 I/Os per Second Figure 4. 2TB models (3Gb) DC current and power vs. input/output operations per second Note. For power details about SED vs. non-SED drive, please refer to section 7.8. 30 Constellation ES Series SAS Product Manual, Rev. F