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BARRACUDA 2, 2HP
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Disc Drive
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ST12450W/WD
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Installation Guide
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Contents Preface .................................................................. 1 Electrostatic discharge protection ........................... 1 Important safety information and precautions ......... 2 Wichtige Sicherheitshinweise ............................... 5 Technical support services ..................................... 10 General description ................................................ 12 Initial setup information ........................................... 17 Kühlung des Syst
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ST12450W/WD Installation Guide, Rev. B 1 Preface This manual contains information for users of the ® Seagate ST12450W/WD Barracuda™ SCSI disc drives. It provides support services, performance speci- fications, and initial setup information. Additional infor- mation is available in the Barracuda 2, 2HP Product Manual (part number 83328900). Contact your Seagate sales representative if you need to order this publication. Electrostatic discharge protection Caution. Removal of circuit boards by pers
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2 ST12450W/WD Installation Guide, Rev. B • Ground yourself to the drive whenever the drive elec- tronics are or will be exposed. Connect yourself to ground with a wrist strap (Seagate part number 12263496). Connection may be made to any grounded metal assembly. As a general rule, remember that you and the drive electronics must all be grounded to avoid potentially damaging static discharges. • Turn off the power before removing or installing the DC power cable. • Do not remove any circuit boards
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ST12450W/WD Installation Guide, Rev. B 3 read and followed to minimize or eliminate the risk of personal injury. The warnings point out conditions or practices that may endanger you or others. The cautions point out conditions or practices that may damage the unit, possibly making it unsafe for use. These warnings and cautions are not exhaustive. We cannot possibly know, evaluate, and advise you of all the ways in which maintenance might be performed or the possible risk of each technique. Conse
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4 ST12450W/WD Installation Guide, Rev. B • Ensure that the internal temperature of the rack or cabinet does not exceed the limits defined for the drive when the drive is mounted in an equipment rack or cabinet. When units are stacked vertically, pay special attention to the top where temperatures are usually highest. • Follow the precautions listed above in “Electrostatic discharge protection.” • Do not remove any circuit boards from the drive chas- sis. Return the entire drive for depot repair
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ST12450W/WD Installation Guide, Rev. B 5 dards. Typical applications of these disc drives include customer packaging and subsystem design. Safety agencies conditionally certify component assemblies, such as the Barracuda disc drive, based on their final acceptability in the end-use product. The subsystem designers are responsible for meeting these conditions of acceptability in obtaining safety/regulatory agency compliance in their end-use products and for certifying where required by law. A nec
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6 ST12450W/WD Installation Guide, Rev. B vorgenommen werden. Wir empfehlen die Verfahren in diesem Handbuch als effektive Methoden zur Wartung und Reparatur der Einheit. Einige Verfahren erfordern Spezialwerkzeuge; diese müssen zur sachgemäßen Ausführung der Wartungsarbeiten und aus Sicherheitsgründen den Empfehlungen entsprechend verwendet werden. Die Verfahren in diesem Handbuch und die Aufkleber auf dem Gerät enthalten Warn- und Vorsichtshinweise. Diese Hinweise sind sorgfältig durchzulesen u
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ST12450W/WD Installation Guide, Rev. B 7 persönliche Sicherheit noch die Leistung der Einheit gefährdet. Beachten Sie in jedem Fall die folgenden Warn-und Vorsichtshinweise: • Führen Sie alle Wartungsarbeiten entsprechend den Anweisungen in diesem Handbuch aus. • Beachten Sie alle Warn- und Vorsichtshinweise in diesem Handbuch. • Treffen Sie beim Betrieb oder bei der Reparatur der Einheit angemessene Sicherheitsvorkehrungen. • Wenn eine Einheit unter Spannung steht, gehen Sie bei der Fehlerdiagn
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8 ST12450W/WD Installation Guide, Rev. B • Befolgen Sie die oben unter “Electrostatic Discharge Protection” angegebenen Sicherheitsmaßnahmen. • Nehmen Sie keine Platinen aus dem Laufwerkgehäuse. Wenn eine Platine defekt ist, muß das gesamte Laufwerk zur Reparatur eingeschickt werden. Die Herausnahme von Platinen durch anderePersonen als die für die werkseitige Reparatur zuständigen kann zu einer Beschädigung der Komponenten und Erlöschen des Garantieanspruchs führen. • Die vormontierte Kopf- un
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ST12450W/WD Installation Guide, Rev. B 9 geltenden Standards zu gewährleisten. Zu den typischen Anwendungen dieser Festplattenwerke zählen Systemeinbau durch den Kunden und die Konstruktion von Untersystemen. Sicherheitsbehörden gewähren eine bedingte Zulassung für Komponenten wie das Barra- cuda-Festplattenlaufwerk vorbehaltlich der endgültigen Zulasssung im Endprodukt. Designer von Untersystemen sind dafür verantwortlich, die Voraussetzungen für die Einhaltung sicherheits- oder aufsichtsbehör
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10 ST12450W/WD Installation Guide, Rev. B Technical support services Seagate Technology provides technical support litera- ture and diagnostic utilities to authorized distributors. Please contact your dealer for technical support and installation troubleshooting. Product technical support is available for all Seagate products by calling the SeaFAX™, SeaFONE™, SeaTDD™, or SeaBOARD™ services. These are toll calls if you dial from outside of the number’s local dialing area. SeaFAX: USA (408) 438-26
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ST12450W/WD Installation Guide, Rev. B 11 SeaTDD: (408) 438-5382 TDD is a telecommunication device for the deaf where two people can communicate using a keyboard that is connected to the phone line. A TDD device is required to access this service, which is available from 8:00 A.M. to 5:00 P.M. PST, Monday through Friday. SeaBOARD: The Seagate Technical Support Bulletin Board System (BBS) is available 24 hours a day, 7 days a week. A modem is required to access this service. The commu- nications
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12 ST12450W/WD Installation Guide, Rev. B General description Barracuda 2, 2HP SCSI disc drives are high-speed, random-access data storage devices. Two-head par- allel technology effectively doubles the internal data transfer rate when compared to non-parallel head technologies. ST12450W/WD drives are illustrated in Figure 1. Speci- fications and DC power requirements for the drives are listed in tables following the figure. The drive is a component for installation in an enclosure designed for
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ST12450W/WD Installation Guide, Rev. B 13 SCSI I/O
Connector J01 J5 J4 DC Power
Connector Figure 1. Barracuda 2, 2HP disc drive
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14 ST12450W/WD Installation Guide, Rev. B Characteristics ST12450W/WD 1 Interface Fast & Wide SCSI-2 Cache type Multi-segmented 1,024 Kbytes Capacity Unformatted 2,437 Mbytes 2 Formatted 1,849 Mbytes Recording Cylinders (user accessible) 2,710 Heads (physical) 18 Heads (logical) 9 Modulation RLL 1,7 code SCSI rate Max burst transfer 20 Mbytes/sec 3 Seek time Average read 8.0 msec Average write 9.0 msec Disc rotation RPM 7,200 Average latency 4.17 msec 1 Can also be operated according to SCSI-1 p
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ST12450W/WD Installation Guide, Rev. B 15 DC power requirements Single-ended Differential + + + + +5V + + + + +12V + + + + +5V + + + + +12V 5 2 2 ± ± ± ± ± ± ± ± Voltage regulation ± ± ± 5% ± ± ± 5% ± ± ± 5% ± ± ± 5% Amps 1 Maximum operating current 1.32 0.91 1.65 0.91 Maximum starting current 3, 6 Peak DC 1.3 2.18 1.43 2.18 3 Peak AC – 3.1 – 3.1 4 Delayed motor start (max) 1.25 1.5 1.31 1.5 Peak operating current 1,10 Typ DC 1.3 0.84 1.6 0.84 1 Max DC 1.32 0.91 1.65 0.91 Max (peak) 1.4 1.85 2.4
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16 ST12450W/WD Installation Guide, Rev. B 2 A –10% tolerance is permissible during initial start of the spindle but must return to ±5% before reaching 7,200 RPM. The ±5% must be maintained after the drive signifies that its power-up sequence has been completed and that the drive is able to accept selection by the host initiator. 3 See the +12V current profile in the Barracuda 2, 2HP Product Manual (publication number 83328900). 4 This condition occurs when the Motor Start option is en- abled and
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ST12450W/WD Installation Guide, Rev. B 17 11 No terminator power. See Section 11.7.3.4 in the Barra- cuda 2, 2HP Product Manual. 12 Seeking is defined as a third-stroke seek at OD. The command is issued every 20 msec. 13 Read track is defined as repeat reads of track 15 with a 60% duty cycle. Initial setup information The following topics are presented to guide you through the installation process. These topics are presented in the order you should follow to properly install the drive. • Setting
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18 ST12450W/WD Installation Guide, Rev. B Setting the SCSI ID jumpers Each device on the SCSI chain must have a unique SCSI ID. The host system’s SCSI controller usually uses the highest-numbered ID available (ID15 in wide systems); therefore the lower-numbered SCSI IDs are normally used for the other SCSI devices such as this Barracuda disc drive. Note. Most SCSI controllers (host adapters) allow you to skip a SCSI ID. For example, you can have ID0, ID1, and ID3 (skipping ID2). Other controller
