Instruction/ maintenance manual of the product ST12450W/WD Seagate
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B ARRA CUDA 2, 2HP Disc Drive ST12450W/WD Installation Guide.
Contents Preface .................................................................. 1 Electrostatic discharge protection ........................... 1 Important safety information and precautions ......... 2 Wichtige Sicherheitshinweise ..............
ST12450W/WD Installation Guide, Rev. B 1 Preface This manual contains information for users of the Seagate ® ST12450W/WD Barr a cu d a ™ 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).
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.
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.
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.
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 i n the end-use product.
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.
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.
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.
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.
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.
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 .
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.
SCSI I/O Connector DC Power Connector J4 J01 J5 Figure 1. Barracuda 2, 2HP disc drive ST12450W/WD Installation Guide, Rev. B 13.
14 ST12450W/WD Installation Guide, Rev. B Characteristics ST12450W/WD Interface Fast & Wide SCSI-2 1 Cache type Multi-segmented 1,024 Kbytes Capacity Unformatted 2,437 Mbytes Formatted 2 1,849 Mby.
ST12450W/WD Installation Guide, Rev. B 15 DC power requirements Single-ended Differential + + + + + 5V + + + + + 12V + + + + + 5V + + + + + 12V Voltage regulation 5 ± ± ± ± ± 5% ± ± ± ± ± 5% 2 ± ± ± ± ± 5% ± ± ± ± ± 5% 2 Amps Maximum operating current 1 1.
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.
ST12450W/WD Installation Guide, Rev. B 17 11 No terminator power. See Section 11.7.3.4 in the Barr a - cud a 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.
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.
ST12450W/WD Installation Guide, Rev. B 19 DC Power Connector SCSI I/O Connector SCSI ID = 8 SCSI ID = 9 SCSI ID = 10 SCSI ID = 11 SCSI ID = 12 SCSI ID = 13 SCSI ID = 14 SCSI ID = 15 SCSI ID = 0 (default) SCSI ID = 1 SCSI ID = 2 SCSI ID = 3 SCSI ID = 4 SCSI ID = 5 SCSI ID = 6 SCSI ID = 7 J5 4P 3P 2P 1P Pin 1 Pin 1 ID3 ID2 ID1 ID0 J5 Figure 2.
20 ST12450W/WD Installation Guide, Rev. B Terminating the drive If you are installing a Barracuda 2, 2HP drive in a system that has other SCSI devices installed, terminate only the end devices on the SCSI chain. A SCSI “device” is any disc drive, scanner, tape-backup unit, or other piece of hardware connected to your system using the SCSI bus.
ST12450W/WD Installation Guide, Rev. B 21 ST12450W (single-ended) drives are terminated with permanently mounted active IC terminators. If you install a n ST12450W drive and it is not on the end of the SCSI bus, remove the jumper from pins 11 and 12 of connector J4 (see Figure 4).
22 ST12450W/WD Installation Guide, Rev. B Terminator power ST 1 24 5 0W d r ives may be c o nf ig ure d i n f o ur di f fere nt ways ( see Figu re 5 ); howe ver , you usually will not need to change t his op tion and shou ld normall y leav e th e driv e conf igure d as it was shippe d fr om the fa ctory .
ST12450W/WD Installation Guide, Rev. B 23 Changing other applicable jumper options Barracuda 2, 2HP drives are designed for use in a variety of systems.
24 ST12450W/WD Installation Guide, Rev. B Figure 6b. Additional jumper options J4 EDT RES PAR Reserved for future use. Reserved (RES) Enable motor start. This makes the drive wait for the Start Unit command from the host before starting the spindle motor.
ST12450W/WD Installation Guide, Rev. B 25 Synchronizing spindles in multiple drive configurations If you are installing two or more Barracuda drives, you may (optionally) want to synchronize their spindles to reduce the latency associated with switching from one drive to another.
26 ST12450W/WD Installation Guide, Rev. B Figure 8 illustrates a typical synchronized spindle configuration. After connecting each drive with spindle sync cables, you must designate a master spindle sync reference source. This master source is normally a disc drive located on the same SCSI bus as the other drives you want to synchronize with.
ST12450W/WD Installation Guide, Rev. B 27 Providing adequate cooling The en c los ure des ig n must ensure ad equ ate co o ling for the dr i v e . The ma x imu m am bient tem per ature is 50 o C. Th e driv e’s product manual (83328900) describes ho w t o ev a lu ate th e a ir -f lo w de si gn.
28 ST12450W/WD Installation Guide, Rev. B Kühlung des Systems Die Gehäusekonstruktion muß eine ausreichende Kühlung des Laufwerkes gewährleisten. Die Umgebungstemperatur darf maximal 50 o C betragen. Die Produkthandbuch Barracuda 2, 2HP (Dokument 83328900) enthalten Anweisungen zur Beurteilung der Luftstromkonstruktion.
ST12450W/WD Installation Guide, Rev. B 29 Figure 9. Suggested air flow Abbildung 9. Empfohlener Luftstromverlauf Above unit Über der Einheit Under unit Unter der Einheit Note. Air flows in the direction shown (back to front) or in reverse direction (front to back) Note.
30 ST12450W/WD Installation Guide, Rev. B Mounting the drive and connecting cables Do not touch the connector pins or any components on the control board without observing static-discharge precautions.
ST12450W/WD Installation Guide, Rev. B 31 Installation des Laufwerkes und Anschluß der Kabel Beachten Sie beim Handhaben und Anfassen der Anschlußstifte und Komponenten die Vorsichtsmaßnahmen zur Verhinderung statischer Aufladung. Fassen Sie das Laufwerk nur am Rahmen an.
32 ST12450W/WD Installation Guide, Rev. B 2. Verify that all connections between the drive and the host system are correctly installed. 2. Prüfen Sie, ob alle Verbindungen zwischen dem Laufwerk und dem Host-System korrekt hergestellt sind. 3. Verify that you have correctly installed jumpers (see Figures 2, 4, 5, and 6).
ST12450W/WD Installation Guide, Rev. B 33 oder gedrückt werden und es darf den Luftstrom zur Kühlung des Systems nicht behindern. Das Laufwerk wird über einen 4-poligen, neben dem SCSI-Anschluß befestigten Steckverbinder mit Gleichstrom versorgt. Der Ausgang eines Netzteils muß SELV (safety extra low voltage) nach IEC 950 entsprechen.
34 ST12450W/WD Installation Guide, Rev. B Note. Signal ground on the power control board (PCB) and the head and disc assembly (HDA) are con- nected together in this drive and you cannot sepa- rate them. The equipment in which you have mounted the drive is connected directly to the HDA and PCB without electrically isolating shock mounts.
ST12450W/WD Installation Guide, Rev. B 35 Systemgehäuse nicht an die HDA/PCB-Erdung anschließen wollen, müssen Sie das Laufwerk auf nichtleitende Weise (galvanisch isoliert) im Host-System einbauen. Die daraus u.U. resultierende verstärkte elektromagnetische Strahlung fällt in den Zuständigkeitsbereich des Systemdesigners.
36 ST12450W/WD Installation Guide, Rev. B Formatting the drive Warning. Formatting a drive erases all user data. Be sure that you understand this principle before formatting any hard disc drive. It is not necessary to format a drive which has previously been used to store data, unless your intention is to erase all user data.
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Seagate Technology, Inc. 920 Disc Drive, Scotts Valley, CA 95066-4544, USA Publication Number: 83328890, Rev. B, Printed in USA.
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