Seagate ST9900805SS Savvio 10K.2 SAS Product Manual - Page 35
Power dissipation
View all Seagate ST9900805SS manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 35 highlights
6.3 Power dissipation ST9146802SS in 3 Gbit operation Typical power dissipation under idle conditions in 3Gb operation is 5.18 watts (17.68 BTUs per hour). 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. ST9146802SS CURRENT/POWER vs THROUGHPUT (SAS - 3.0GB) Random 8 Block Reads 1.400 14.00 5Vo lt A 1.200 12.00 12 Vo lt A Watts 1.000 10.00 Amperes Power (watts) 0.800 8.00 0.600 6.00 0.400 4.00 0.200 2.00 0.000 0.0 0.00 50.0 100.0 150.0 200.0 250.0 300.0 350.0 I/Os per Second Figure 4. ST9146802SS (3 Gbit) DC current and power vs. input/output operations per second ST973402SS in 3 Gbit operation Typical power dissipation under idle conditions in 3Gb operation is 5.14 watts (17.54 BTUs per hour). 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. ST973402SS CURRENT/POWER vs THROUGHPUT (SAS - 3.0GB) Random 8 Block Reads 1.400 14.00 5Vo lt A 1.200 12.00 12 Vo lt A Watts 1.000 10.00 Amperes Power (watts) 0.800 8.00 0.600 6.00 0.400 4.00 0.200 2.00 0.000 0.0 0.00 50.0 100.0 150.0 200.0 250.0 300.0 350.0 I/Os per Second Figure 5. ST973402SS (3 Gbit) DC current and power vs. input/output operations per second Savvio 10K.2 SAS Product Manual, Rev. D 29