User manual MAXTOR ST31230N VOLUME 1

[. . . ] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HAWK 2LP Family: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ST32430N/ND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ST31230N/ND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Product Manual, Volume 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HAWK 2LP Family: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ST32430N/ND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ST31230N/ND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Product Manual, Volume 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . © 1996 Seagate Technology, Inc. All rights reserved Publication Number: 77767471, Revision F March 1996 Seagate®, Seagate Technology®, and the Seagate logo are registered trademarks of Seagate Technology, Inc. [. . . ] Seagate recommends shipping by an air-ride carrier experienced in handling computer equipment. Product repair and return information Seagate customer service centers are the only facilities authorized to service Seagate drives. Any unauthorized repair or tampering with the factory-seal voids the warranty. 18 Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F _____________________________________________________________________________________ 7. 0 7. 1 7. 2 Physical/electrical specifications AC power requirements: None DC power requirements The voltage and current requirements for a single drive are shown in the following table. The single ended power requirements includes the internal disc drive SCSI I/O termination. Table 7. 2-1. DC power requirements ST32430 Single Ended Differential I/O +5 V +12 V +5 V +12V ±5% ±5% +5% +5% 0. 36 A 0. 35 A 0. 51 A 0. 35 A 0. 61 A 0. 56 A 0. 80 A 0. 85 A 1. 1 A 2. 0 A 0. 22 A 0. 40 A 0. 42 A 1. 9 A 0. 71 A 0. 56 A 0. 90 A 1. 05 A 1. 3 A 2. 0 A 0. 22 A 0. 40 A 0. 42 A 1. 9 A ST31230 Single Ended Differential I/O +5 V +12 V +5 V +12V ±5% ±5% +5% +5% 0. 36 A 0. 35 A 0. 51 A 0. 35 A 0. 61 A 0. 56 A 0. 80 A 0. 85 A 1. 1 A 2. 0 A 0. 22 A 0. 40 A 0. 42 A 1. 9 A 0. 71 A 0. 56 A 0. 90 A 1. 05 A 1. 3 A 2. 0 A 0. 22 A 0. 40 A 0. 42 A 1. 9 A Voltage Regulation [4] [2] Average Idle Current [1] Maximum Starting Current (Peak) [5][2][6] Delayed Motor Start (Max) [3][5] Operating Current [6] Typ. [2] A droop of up to -10% is permissible during the T2 portion of power up (see Figure 7. 2. 2-1). [3] This condition occurs when the Motor Start Option is enabled and the drive has not yet received a Start Motor command. [5] Peaks of 0. 90 A (nominal) on +12 V will occur for no more than 100 ms total during the first 250 ms after power is applied. [6] Instantaneous peaks in excess of these values and less than 5 msec. At powerup, the motor current regulator limits the 12 volt current to a peak value of less than 1. 9 amperes, although instantaneous peaks may occur as stated in [7] above. Minimum operating current loading for each supply voltage is not less than 38% 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. 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 50 kHz and 45 mA pp from 50 kHz to 10 mHz. 150 mV pp from 0 to 50 kHz and 60 mA pp from 50 kHz to 10 mHz. Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F 19 _____________________________________________________________________________________ 7. 2. 2 Power sequencing The drive does not require power sequencing. The drive protects against inadvertent writing during power up and down. Daisy-chain 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. [. . . ] 12. 1 Front panel The normal front panel available is black plastic. Each panel has a single rectangular green rectangular LED indicator lens which, when glowing, indicates the drive is selected. 12. 2 Single unit shipping pack The drive is normally shipped in bulk packaging to provide maximum protection against transit damage. Units shipped individually require additional protection as provided by the single unit shipping pack. [. . . ]