User manual MAXTOR SAVVIO 15K.2 SAS

[. . . ] Product Manual Savvio 15K. 2 SAS ® Standard Models Self-Encrypting Drive Models ST9146852SS ST973452SS ST9146752SS ST973352SS SED FIPS 140-2 Models ST9146652SS ST973252SS 100516230 Rev. E March 2011 © 2011, Seagate Technology LLC All rights reserved. E March 2011 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. [. . . ] 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 15K. 2 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 15K. 2 SAS Product Manual, Rev. E 7. 2. 3 Current profiles The +12V and +5V current profiles for the Savvio 15K. 2 SAS drives are shown below. Figure 1. Current profile for 146GB models. Savvio 15K. 2 SAS Product Manual, Rev. E 25 Figure 2. Current profile for 73GB models Note: All times and currents are typical. See Tables 2 and 3 for maximum current requirements. 26 Savvio 15K. 2 SAS Product Manual, Rev. E 7. 3 Power dissipation 146GB models in 6. 0 Gbit operation Typical power dissipation under idle conditions in 6. 0 Gb operation is 4. 37 watts (14. 91 BTUs per hour). To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 3). 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 3. 146GB models (6. 0 Gbit) DC current and power vs. input/output operations per second 146GB models in 3. 0 Gbit operation Typical power dissipation under idle conditions in 3. 0 Gbit operation is 4. 32 watts (14. 74 BTUs per hour). To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 3). 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. [. . . ] E 61 12. 4. 7 Power The drive receives power (+5 volts and +12 volts) through the SAS device connector. The current return for the +12 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. The current return for the +5 volt power supply is through the common ground pins. [. . . ]