Seagate ST91000641NS, ST9500622NS, ST9500621NS, ST9500620NS, ST9250610NS manual Cooling, Air flow

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4.5Cooling

Cabinet cooling must be designed by the customer so that the ambient temperature immediately surrounding the drive will not exceed temperature conditions specified in Section 3.9.1, "Temperature."

The rack, cabinet, or drawer environment for the drive must provide heat removal from the electronics and head and disc assembly (HDA). You should confirm that adequate heat removal is provided using the temper- ature measurement guidelines described in Section 3.9.1.

Forced air flow may be required to keep temperatures at or below the temperatures specified in Section 3.9.1 in which case the drive should be oriented, or air flow directed, so that the least amount of air flow resistance is created while providing air flow to the electronics and HDA. Also, the shortest possible path between the air inlet and exit should be chosen to minimize the travel length of air heated by the drive and other heat sources within the rack, cabinet, or drawer environment.

If forced air is determined to be necessary, possible air-flow patterns are shown in Figure 7. The air-flow pat- terns are created by one or more fans, either forcing or drawing air as shown in the illustrations. Conduction, convection, or other forced air-flow patterns are acceptable as long as the temperature measurement guide- lines of Section 3.9.1 are met.

Note. Air flows in the direction shown (back to front) or in reverse direction (front to back)

Above unit

Under unit

Note. Air flows in the direction shown or in reverse direction (side to side)

Figure 7. Air flow

Above unit

Under unit

28	Constellation.2 Serial ATA Product Manual, Rev. B

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Contents Standard Models Self-Encrypting Drive Models ST91000642NS ST9500622NS ST9250612NSSED Fips 140-2 Models Revision history Revision Date Sheets affected or commentsContents Serial ATA Sata interface List of Figures Page Seagate Technology support services Seagate Online Support and ServicesIntroduction About the Serial ATA interface Drive specifications Specification summary tablesDrive specifications summary for 1TB, 500 and 250 GB models Constellation.2 Serial ATA Product Manual, Rev. B Formatted capacity Default logical geometryLBA mode Recording and interface technologyStart/stop times Physical characteristicsSeek time Typical seek times ms Read WriteSpinup power Power specificationsPower consumption Standby modeST91000640NS Parameter 0GB Voltage +12 1000GB drive Standard & SED model DC power requirementssPower Regulation +10/-7.5% Watts500GB drive Standard & SED model DC power requirements ST9500620NS Parameter 0GB Voltage +12250GB drive Standard & SED model DC power requirements ST9250610NS Parameter 0GB Voltage +12Typical current profiles Conducted noise Voltage toleranceIdle mode Power-management modesActive mode Sleep modePowerChoice is invoked using one of two methods Power Condition Name Power Condition ID DescriptionEnvironmental limits Temperature a. OperatingRelative humidity Operating shock Effective altitude sea levelShock Nonoperating shockOperating vibration AcousticsVibration Nonoperating vibrationRadio frequency environments Electromagnetic immunityReliability Test Description Performance level Reference standardAgency certification Environmental protection Product warrantyReference documents Storage ShippingProduct repair and return information Corrosive environment China Restriction of Hazardous Substances RoHS DirectiveConfiguring and mounting the drive Handling and static-discharge precautionsConfiguring the drive Serial ATA cables and connectorsMounting dimensions-top, side and end view Drive mountingCooling Air flowPurpose About FipsLevel 2 security About self-encrypting drives Controlled accessAdmin SP Data encryptionDrive locking Default passwordRandom number generator RNG Data bandsSupported commands Authenticated firmware downloadPower requirements Cryptographic eraseSerial ATA Sata interface Hot-Plug compatibilitySignal Serial ATA device plug connector pin definitionsSerial ATA connector pin definitions Pin Function DefinitionSupported ATA commands Supported ATA commandsCommand name Command code in hex F4H Identify Device command Word Description ValueXx07H Description if bit is set to Bit Word Bit WordWord Set Features command Set Features command valuesA.R.T. commands 3 S.M.A.R.T. commandsCode in features register A.R.T. command Index ITE Page Constellation.2 Serial ATA Product Manual, Rev. B Page Disc Drive, Scotts Valley, California 95066-4544, USA