User manual SEAGATE SAVVIO 10K.3 SAS REV F

[. . . ] Product Manual Savvio 10K. 3 SAS ® Standard Models Self-Encrypting Drive Models ST9300603SS ST9146803SS ST9300503SS ST9146703SS SED FIPS 140-2 Models ST9300403SS ST9146603SS 100516229 Rev. F November 2010 Seagate, Seagate Technology and the Wave logo are registered trademarks of Seagate Technology LLC in the United States and/or other countries. Savvio and SeaTools are either trademarks or registered trademarks of Seagate Technology LLC or one of its affiliated companies in the United States and/or other countries. The FIPS logo is a certification mark of NIST, which does not imply product endorsement by NIST, the U. S. , or Canadian governments. [. . . ] This condition occurs after OOB and Speed Negotiation completes but before the drive has received the Notify Spinup primitive. See paragraph 7. 2. 1, "Conducted noise immunity. " Specified voltage tolerance includes ripple, noise, and transient response. During idle, the drive heads are relocated every 60 seconds to a random location within the band from three-quarters to maximum track. Savvio 10K. 3 SAS Product Manual, Rev. Minimum current loading for each supply voltage is not less than 1. 7% of the maximum operating current shown. Where power is provided to multiple drives from a common supply, careful consideration for individual drive power requirements should be noted. Where multiple units are powered on simultaneously, the peak starting current must be available to each device. Parameters, other than spindle start, are measured after a 10-minute warm up. 7. 2. 1 Conducted noise immunity Noise is specified as a periodic and random distribution of frequencies covering a band from DC to 10 MHz. Maximum allowed noise values given below are peak-to-peak measurements and apply at the drive power connector. +5v +12v = = 250 mV pp from 100 Hz to 20 MHz. 250 mV pp from 20 KHz to 5 MHz. 7. 2. 2 Power sequencing The drive does not require power sequencing. The drive protects against inadvertent writing during power-up and down. 24 Savvio 10K. 3 SAS Product Manual, Rev. F 7. 2. 3 Current profiles The +12V and +5V current profiles for the Savvio 10k. 3 drives are shown below. Figure 17. Current profiles for 300GB models Savvio 10K. 3 SAS Product Manual, Rev. F 25 Figure 18. Current profiles for 146GB models Note: All times and currents are typical. See Tables 2 and 3 for maximum current requirements. 26 Savvio 10K. 3 SAS Product Manual, Rev. F 7. 3 Power dissipation 300 GB models in 3 Gbit operation Typical power dissipation under idle conditions in 3Gb operation is 3. 79 watts (12. 93 BTUs per hour). To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 19). 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. Figure 19. 300GB (at 3 Gbit) DC current and power vs. input/output operations per second Savvio 10K. 3 SAS Product Manual, Rev. F 27 300GB models in 6 Gbit operation Typical power dissipation under idle conditions in 6Gb operation is 3. 82 watts (13. 03 BTUs per hour). To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 19). 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. [. . . ] The supply current and return current must be distributed as evenly as possible among the pins. The current return for the +5 volt power supply is through the common ground pins. The supply current and return current must be distributed as evenly as possible among the pins. Current to the drive through the long power pins may be limited by the system to reduce inrush current to the drive during hot plugging. 12. 5 Signal characteristics This section describes the electrical signal characteristics of the drive's input and output signals. [. . . ]