User manual SEAGATE ST12400NC VOLUME 1

[. . . ] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Hawk 2 Family: ST12400N/ND/NC ST11900N/ND/NC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Product Manual, Volume 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Hawk 2 Family: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ST12400N/ND/NC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ST11900N/ND/NC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Product Manual, Volume 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . © 1995 Seagate Technology, Inc. All rights reserved Publication Number: 77767450, Revision E March 1995 Seagate®, Seagate Technology® and the Seagate logo are registered trademarks of Seagate Technology, Inc. HawkTM, SeaFAXTM, SeaFoneTM, SeaTDDTM and SeaBOARDTM are trademarks of Seagate Technology, Inc. Other product names are registered trademarks or trademarks of their owners. [. . . ] Air flow is needed to achieve these temperature values. Operation at case temperatures above these values may adversely affect the drive's ability to meet specifications. The MTBF specification for the drive is based on operating at an ambient temperature of 95°F (35°C) with no air flow. Occasional excursions to drive ambient temperatures of 50°C or 5°C may occur without impact to specified MTBF. To achieve the specified MTBF, the values of Table 7. 4. 1-1 Column 2 must be considered maximum average operating case temperatures. Continual or sustained operation at case temperatures above the values shown in Column 2 may degrade MTBF. Table 7. 4. 1-1. PCB and HDA temperatures Items in Figure 7. 4. 1-1 HDA U2 U8 Q2 Q13 Column 1 Maximum Case Temperatures (°C) Operating 50°C Ambient[3] 60 [2] 80 65 64 72 Column 2 Typical Case Temperatures (°C) at 35°C Ambient[1] 56 72 50 63 67 Note. [1] The temperatures in Column 2 were measurements made in an enclosed box with no air flow at a pressure of one atmosphere with random seeks. [2] No point on the top of the HDA shall exceed this temperature. [3] Ambient temperature is measured at the side of the drive 0. 25" (6. 4 mm) from the case. Non-Operating -40° to 158°F (-40° to 70°C) package ambient with a maximum gradient of 45°F (25°C) per hour. This specification assumes that the drive is packaged in the shipping container designed by Seagate for use with the drive. Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. E 25 _________________________________________________________________________________________ HDA ** Single Ended I/O PCB * U17 U7 U2 U16 U8 U3 Q13 U15 U11 U1 Q4 Q1 U2Ø U18 U19 U1Ø U5 U4 Q2 J1 ** * ** Bottom side of PCB. J1 is a single 80 pin connector on "NC" models. Shown is a 50 pin SCSI I/O connector and the 4 pin DC power connector. Figure 7. 4. 1-1. Locations of components listed in Table 7. 4. 1-1 SE A GA TE Differential I/O PCB * U17 U7 U2 U16 U8 U3 Q13 U15 U11 U1 Q4 Q1 U2Ø U18 U19 U1Ø U5 U24 U4 Q2 J1 ** 26 Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. D _________________________________________________________________________________________ 7. 4. 2 Relative humidity The values below assume that no condensation on the drive occurs. Operating 8% to 80% relative humidity with a maximum gradient of 10% per hour. Non-Operating 5% to 95% relative humidity. 7. 4. 3 Effective altitude (Sea level reference) a. Operating -1000 to +10, 000 feet (-305 to +3048 metres) b. Non-Operating -1000 to +40, 000 feet (-305 to +12, 210 metres) 7. 4. 4 Shock and vibration Shock and vibration limits specified in this document are measured directly on the drive chassis. [. . . ] SeaFAX number: United States 408/438-2620 England 44-62-847-7080 You can use a touch-tone telephone to access Seagate's automated FAX delivery system and select technical support information by return FAX. This service is available 24 hours a day, 7 days a week. Seagate Technical Support FAX: 408/438-8137 You can FAX specific questions or comments to Seagate technical support specialists 24 hours daily. SeaFone telephone number: 408/438-8222 The enhanced phone system provides recorded technical information on selected Seagate products while you are on hold. [. . . ]