User manual MAXTOR ST173404FC VOLUME 1

[. . . ] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cheetah 73FC Disc Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ST173404FC/FCV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Product Manual, Volume 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cheetah 73FC Disc Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ST173404FC/FCV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] C Typical power dissipation under idle conditions is 17. 05 watts (58. 18 BTUs per hour). To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 5). 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. 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). Maximum wet bulb temperature is 82°F (28°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]). The maximum allowable HDA case temperature is 60°C. 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. [. . . ] SeaTDDTM (+1-405-936-1687) is a telecommunications device for the deaf (TDD). You can send questions or comments 24 hours daily and exchange messages with a technical support specialist from 8:00 A. M. (central time) Monday through Friday. Customer Service (CSO) Warranty Service Seagate offers worldwide customer support for Seagate drives. Seagate direct OEM, Distribution and System Integrator customers should contact their Seagate service center representative for warranty information. [. . . ]