User manual SEAGATE SAVVIO FC

[. . . ] Product Manual Savvio FC ST973401FC ST936701FC 100293077 Rev. D August 2007 Copyright © 2005-2007 Seagate Technology LLC. D, August May 2007 Seagate, Seagate Technology and the Wave logo are registered trademarks of Seagate Technology LLC in the United States and/or other countries. Savvio, SeaTools and SeaTDD are either trademarks or registered trademarks of Seagate Technology LLC or one of its affiliated companies in the United States and/or other countries. [. . . ] See paragraph 6. 2. 1, "Conducted noise immunity. " Specified voltage tolerance includes ripple, noise, and transient response. Operating condition is defined as random 8 block reads at: 258 I/Os per second (ST973401FC at 1Gbit operation) 259 I/Os per second (ST973401FC at 2Gbit operation) 258 I/Os per second (ST936701FC at 1Gbit operation) 258 I/Os per second (ST936701FC at 1Gbit operation) During idle, the drive heads are relocated every 60 seconds to a random location within the band from three-quarters to maximum track. General DC power requirement notes. Minimum current loading for each supply voltage is not less than 1. 2% of the maximum operating current shown. The +5V and +12V supplies should employ separate ground returns. 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. No terminator power. 26 Savvio FC Product Manual, Rev. D 6. 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 100 hz to 20 Mhz 100 hz to 8 Khz 8 Khz to 20 Khz 20 Khz to 5 Mhz 250mV 800 mVpp 450 mVpp 250 mvpp +12V 6. 2. 2 Power sequencing The drive does not require power sequencing. The drive protects against inadvertent writing during power-up and down. 6. 2. 3 Current profiles The +12V and +5V current profiles for the ST973401FC and ST936701FC models are shown below in the following figures. T0 T1 T2 T3 Power is applied to the drive. Spindle begins to accelerate under current limiting after performing internal diagnostics. Spindle is up to speed and the Head-Arm restraint is unlocked. Note: All times and currents are typical. See Table 2 for maximum current requirements. Figure 2. Typical ST973401FC drive +12V current profile Savvio FC Product Manual, Rev. Typical ST973401FC drive +5V current profile Figure 4. Typical ST936701FC drive +12V current profile 28 Savvio FC Product Manual, Rev. Typical ST936701FC drive +5V current profile Savvio FC Product Manual, Rev. D 29 6. 3 Power dissipation ST973401FC Typical power dissipation under idle conditions in 1Gb operation is 6. 6 watts (22. 5 BTUs per hour). Typical power dissipation under idle conditions in 2Gb operation is 6. 9 watts (23. 7 BTUs per hour) To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 6). 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. [. . . ] Submit pricing requests, orders and returns through a single, password-protected Web interface-anytime, anywhere in the world. spp. seagate. com spp. seagate. com supports Seagate resellers with product information, program benefits and sales tools. You may register for customized communications that are not available on the web. These communications contain product launch, EOL, pricing, promotions and other channel-related information. [. . . ]