User manual MAXTOR ST336605FC VOLUME 1

[. . . ] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cheetah 73LP FC Disc Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ST373405FC/FCV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ST336605FC/FCV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Product Manual, Volume 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cheetah 73LP FC Disc Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ST373405FC/FCV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ST336605FC/FCV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Product Manual, Volume 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . © 2002 Seagate Technology LLC All rights reserved May 2002 Publication number: 100109944, Rev. D Seagate, Seagate Technology, and the Seagate logo are registered trademarks of Seagate Technology LLC. [. . . ] See Table 1 for maximum current requirements. +12 Volt Current during spindle start ­ Typical Amperes Envelope of waveform Average value of waveform 3. 0 A 2. 0 1. 0 0. 0 T0 T1 T2 0 2 T3 T4 4 6 8 Seconds 10 12 14 16 Figure 3. Typical ST373405FC drive +12V current profile Cheetah 73LP FC Product Manual, Rev. D 21 +12 Volt Current during spindle start ­ Typical Amperes Envelope of waveform 3. 0 A 2. 0 1. 0 Average value of waveform 0. 0 T0 T1 T2 T3 T4 0 2 4 6 8 Seconds 10 12 14 16 Figure 4. Typical ST336605FC drive +12V current profile +5 Volt Current during spindle start ­ Typical Amperes 3. 0 A 2. 0 1. 0 Nominal (average) DC curve AC Component 0. 0 T0 T1 T2 T3 T4 T5 0 2 4 6 8 Seconds 10 12 14 16 Figure 5. Typical ST373405FC drive +5V current profile 22 Cheetah 73LP FC Product Manual, Rev. D +5 Volt Current during spindle start ­ Typical Amperes 3. 0 A 2. 0 1. 0 Nominal (average) DC curve AC Component 0. 0 T0 T1 T2 T3 T4 T5 0 2 4 6 8 Seconds 10 12 14 16 Figure 6. Typical ST336605FC drive +5V current profile Cheetah 73LP FC Product Manual, Rev. D 6. 3 Power dissipation 23 ST373405FC Typical power dissipation under idle conditions is 11. 3 watts (38. 6 BTUs per hour). To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 7). 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 5V A 12V A Watts 17 15 Watts 0. 800 0. 600 0. 400 0 50 100 I/Os per Second Figure 7. input/output operations per second Amperes 1. 200 1. 000 13 11 150 200 ST336605FC Typical power dissipation under idle conditions is 9. 6 watts (32. 8 BTUs per hour). To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 7). 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 5V A 12V A Watts 17 15 Watts 0. 800 0. 600 0. 400 0 50 100 150 200 250 I/Os per Second Figure 8. input/output operations per second Amperes 1. 200 1. 000 13 11 24 6. 4 Environmental limits Cheetah 73LP FC Product Manual, Rev. D 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 temperature, the drive meets all specifications over a 41°F to 131°F (5°C to 55°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 these temperatures are not exceeded. Air flow may be needed to achieve these temperature values (see Section 8. 4). Operation at HDA 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 HDA case temperatures are not exceeded. Occasional excursions to drive ambient temperatures of 131°F (55°C) or 41°F (5°C) may occur without impact to specified MTBF. Continual or sustained operation at HDA case temperatures above these values may degrade MTBF. The maximum allowable continuous or sustained HDA case temperature for the rated MTBF is 122°F (50°C). [. . . ] 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). You can send questions or comments 24 hours daily and exchange messages with a technical support specialist from 8:00 A. M. [. . . ]