User manual SEAGATE ST11200N

[. . . ] Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D _____________________________________________________________________________________ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Hawk 1 Family . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ST11200N/ND/NC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ST1980N/ND/NC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Operating condition is defined as Random Seek Reads of 64 blocks. Minimum current loading for each supply voltage is not less than 30% of the maximum operating current shown. The +5 and +12 volt supplies shall 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. Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D 23 _____________________________________________________________________________________ 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. +5 V = +12 V = 150 mV pp from 0 to 100 kHz and 45 mA pp from 100 kHz to 10 MHz. 150 mV pp from 0 to 100 kHz and 60 mA pp from 100 kHz to 10 MHz. Power sequencing 7. 2. 2 The drive does not require power sequencing. The drive protects against inadvertent writing during power up and down. Daisychain operation requires that power be maintained on the terminated drive to ensure proper termination of the peripheral I/O cables. 7. 2. 3 12 V - current profile Figure 7. 2. 2-1 identifies the drive +5 V and +12 V current profile. The current during the various times is as shown: T - Power is applied to the drive. T1 - Controller self tests are performed. T2 Spindle begins to accelerate under current limiting after performing internal diagnostics. T3 - The spindle is up to speed and the Head-Arm restraint is unlocked. T4 The heads move from the landing zone to the data area. T5 - The adaptive calibration sequence is performed. T6 - Calibration is complete and the drive is ready for reading and writing. 24 Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D ______________________________________________________________________________________ Note. See Table 7. 2-1 for maximum current requirements. 1. 0 5V Current . 5 CH1 GND T3 T1 2. 0 T2 T4 T5 T6 1. 5 12V Current 1 T Channel 1 2 s . 5 Amps Channel 2 2 s . 5 Amps 0 2 4 6 8 Seconds Figure 7. 2. 2-1. [. . . ] SeaFone: 408/438-8222 The enhanced phone system provides recorded technical information on selected Seagate products while you are on hold. Technical support specialists are available to answer questions from 8:00 AM to 5:00 PM PST, Monday through Friday. Recordings are accessible 24 hours a day, 7 days a week. SeaTDD: 408/438-5382 TDD is a Telecommunication Device for the Deaf where two people can communicate using a keyboard that is connected to the phone line. [. . . ]