User manual MAXTOR ST173404FC VOLUME 1

[. . . ] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cheetah 73FC Disc Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ST173404FC/FCV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Product Manual, Volume 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cheetah 73FC Disc Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ST173404FC/FCV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Product Manual, Volume 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . © 2000 Seagate Technology, LLC All rights reserved August 2000 Publication number: 83329482, Rev. C Seagate, Seagate Technology, and the Seagate logo are registered trademarks of Seagate Technology, LLC. [. . . ] To calculate BTUs per hour, multiply watts by 3. 4123. 1. 800 1. 600 1. 400 Amperes 1. 200 1. 000 0. 800 0. 600 0. 400 0 50 100 I/Os per Second Figure 5. input/output operations per second 5V A 12V A Watts 23 21 19 Watts 17 15 150 200 6. 4 Environmental limits Temperature and humidity values experienced by the drive must be such that condensation does not occur on any drive part. Altitude and atmospheric pressure specifications are referenced to a standard day at 58. 7°F (14. 8°C). Operating With cooling designed to maintain the case temperatures of Table 2, the drive meets all specifications over a 41°F to 122°F (5°C to 50°C) drive ambient temperature range with a maximum temperature gradient of 36°F (20°C) per hour. The enclosure for the drive should be designed such that the temperatures at the locations specified in Table 2 are not exceeded. Air flow may be needed to achieve these temperature values (see Section 8. 4 and 8. 4. 1). Operation at case temperatures above these values may adversely affect the drives ability to meet specifications. The MTBF specification for the drive is based on operating in an environment that ensures that the case temperatures specified in Table 2 are not exceeded. Occasional excursions to drive ambient temperatures of 122°F (50°C) or 41°F (5°C) may occur without impact to specified MTBF. Air flow may be needed to achieve these temperatures (see Section 8. 4. 1). Continual or sustained operation at case temperatures above these values may degrade MTBF. To confirm that the required cooling for the electronics and HDA is provided, place the drive in its final mechanical configuration, perform random write/read operations. After the temperatures stabilize, measure the case temperature of the components listed in Table 2 (see note [2]). Operation of the drive at the maximum case temperature is intended for short time periods only. Continuous operation at the elevated temperatures will reduce product reliability. Cheetah 73FC Product Manual, Rev. C Table 2: PCBA and HDA temperatures Items in Figure 6 Maximum allowable case temperature (°C) operating Maximum allowable case [3] temperatures (°C) to meet MTBF spec. 25 HDA [2] 1 (Processor) 2 (A/D Demod) 3 (FC Interface) 4 (Voyager) Notes. [1] 60 77 93 100 86 45 57 73 80 66 [2] [3] Section 8. 3. 1 describes the air-flow patterns used when generating the 1, 200, 000 hours MTBF guidelines in column 2. Inlet air temperature to the drive was 77°F (25°C), plus 9°F (5°C) temperature rise in the test enclosure (86°F/30°C ambient local to the drive). Non-operating ­40° to 158°F (­40° to 70°C) package ambient with a maximum gradient of 36°F (20°C) per hour. This specification assumes that the drive is packaged in the shipping container designed by Seagate for use with drive. HDA Temp. Locations of PCBA components listed in Table 2 26 6. 4. 2 Relative humidity Cheetah 73FC Product Manual, Rev. C The values below assume that no condensation on the drive occurs. [. . . ] Dealers are familiar with their unique system configurations and can help you with system conflicts and other technical issues. If you need additional help, you can talk to a Seagate technical support specialist. Before calling, note your system configuration and drive model number (ST####). SeaTDDTM (+1-405-936-1687) is a telecommunications device for the deaf (TDD). [. . . ]