○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ BARRACUDA 2, 2HP ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ Disc Drive ○ ○ ○ ○ ○ ○ ○ ○ ST12450W/WD ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
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 Systems ........
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 specifications, and initial setup information. Additional information 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.
2 ST12450W/WD Installation Guide, Rev. B • Ground yourself to the drive whenever the drive electronics 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.
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.
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 chassis.
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 compliancein their end-use products and for certifying where required by law.
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.
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.
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.
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 Barracuda-Festplattenlaufwerk vorbehaltlich der endgültigen Zulasssung im Endprodukt.
10 ST12450W/WD Installation Guide, Rev. B Technical support services Seagate Technology provides technical support literature 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.
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.
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 parallel technology effectively doubles the internal data transfer rate when compared to non-parallel head technologies. ST12450W/WD drives are illustrated in Figure 1. Specifications 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 the drive.
ST12450W/WD Installation Guide, Rev. B SCSI I/O Connector J5 J4 J01 DC Power Connector Figure 1.
14 ST12450W/WD Installation Guide, Rev. B Characteristics ST12450W/WD Interface Fast & Wide SCSI-21 Cache type Multi-segmented 1,024 Kbytes Capacity Unformatted Formatted2 2,437 Mbytes 1,849 Mbytes Recording Cylinders (user accessible) Heads (physical) Heads (logical) Modulation 2,710 18 9 RLL 1,7 code SCSI rate Max burst transfer 20 Mbytes/sec Seek time3 Average read Average write 8.0 msec 9.0 msec Disc rotation RPM Average latency 7,200 4.
ST12450W/WD Installation Guide, Rev. B 15 DC power requirements Voltage regulation5 Maximum operating current1 Maximum starting current Peak DC3, 6 Peak AC3 Single-ended Differential + 5V +12V + 5V + 12V ± 5% ± 5%2 ± 5% ± 5%2 Amps 1.32 0.91 1.65 0.91 1.3 – 2.18 3.1 1.43 – 2.18 3.1 Delayed motor start (max)4 1.25 1.5 1.31 1.5 Peak operating current Typ DC1,10 Max DC1 Max (peak) 1.3 1.32 1.4 0.84 0.91 1.85 1.6 1.65 2.4 0.84 0.91 1.85 Track following (DC) at OD1 at ID1 1.3 1.3 0.78 0.82 1.
16 2 ST12450W/WD Installation Guide, Rev. B 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).
ST12450W/WD Installation Guide, Rev. B 17 11 No terminator power. See Section 11.7.3.4 in the Barracuda 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.
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).
ST12450W/WD Installation Guide, Rev. B SCSI I/O Connector Pin 1 DC Power Connector Pin 1 J5 4P ID3 ID1 ID2 ID0 J5 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 SCSI ID = 8 SCSI ID = 9 SCSI ID = 10 SCSI ID = 11 SCSI ID = 12 SCSI ID = 13 SCSI ID = 14 SCSI ID = 15 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. The top example in Figure 3 shows an internal hard disc at one end of the SCSI bus with the SCSI controller at the other end (both are terminated).
ST12450W/WD Installation Guide, Rev. B 21 ST12450W (single-ended) drives are terminated with permanently mounted active IC terminators. If you install an 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).This disables the terminators on the drive. If you install an ST12450W drive on the end of the SCSI bus, ensure that a jumper is installed on pins 11 and 12 of connector J4. Note. Use active t erminators when terminating the bus.
22 ST12450W/WD Installation Guide, Rev. B Terminator power ST12450W drives may be configured in four different ways (see Figure 5); however, you usually will not need to change this option and should normally leave the drive configured as it was shipped from the factory. ST12450WD drives should be configured with a jumper connecting J01 pins 1 and 3 (and no jumper on J01 pins 2 and 4) as illustrated in Figure 5. Power Connector J01 J4 Pin 1 Pin 3 J01 * Term. power from drive. * Term.
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. Unique installations may require you to change one or more of the other jumpers to meet specific system requirements; however, in most cases, you will not need to change any of these jumpers for normal drive operation. Figures 6a and 6b provide the information necessary to configure all jumpers not discussed elsewhere in this manual.
24 ST12450W/WD Installation Guide, Rev. B J4 Pin 1 J01 Reserved (RES) RES EDT PAR DMS RES RES MTR WP J4 Reserved for future use. Parity Check option (PAR) Enable parity check of SCSI bus data. Disable parity check of SCSI bus data (default). Motor Start option (MTR) Enable motor start. This makes the drive wait for the Start Unit command from the host before starting the spindle motor. Disable motor start.
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. Spindle sync cables are used to connect the drives. Use pins 11 and 12 on the J5 connector to attach the spindle sync cable. Pin 11 provides the reference index signal (REFSIG+) and pin 12 provides ground (GND). See Figure 7.
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. To designate a drive as the master, use SCSI interface commands. Refer to the product manual for information about using these commands.
ST12450W/WD Installation Guide, Rev. B 27 Providing adequate cooling The enclosure design must ensure adequate cooling for the drive. The maximum ambient temperature is 50 oC. The drive’s product manual (83328900) describes how to evaluate the air-flow design. The evaluation consists of ensuring that the case temperatures of certain critical components remain within acceptable limits during drive operation.
28 ST12450W/WD Installation Guide, Rev. B Kühlung des Systems Die Gehäusekonstruktion muß eine ausreichende Kühlung des Laufwerkes gewährleisten. Die Umgebungstemperatur darf maximal 50oC betragen. Die Produkthandbuch Barracuda 2, 2HP (Dokument 83328900) enthalten Anweisungen zur Beurteilung der Luftstromkonstruktion. Die Beurteilung muß sicherstellen, daß sich die Gehäusetemperatur bestimmter kritischer Komponenten bei Laufwerkbetrieb innerhalb zugelassener Grenzen hält.
ST12450W/WD Installation Guide, Rev. B 29 Above unit Über der Einheit Note. Air flows in the direction shown (back to front) or in reverse direction (front to back) Hinweis. Luftstrom in der angezeigten Richtung (von vorne nach hinten) oder in umgekehrter Richtung (von hinten nach vorne) Under unit Unter der Einheit Above unit Über der Einheit Note. Air flows in the direction shown or in reverse direction (side to side) Hinweis.
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. Always handle the drive by the frame only. The drive may be mounted in any orientation (horizontally, vertically, and any combination thereof); however, you must ensure that the drive receives adequate air flow for cooling. 1. Mount the drive to the host system’s chassis using four 6-32 UNC screws.
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. Das Laufwerk kann in beliebiger Orientierung (horizontal, vertikal oder schräg) installiert werden; jedoch muß dafür gesorgt werden, daß ein ausreichender Luftstrom zur Kühlung des Laufwerkes vorhanden ist. 1.
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). 3. Stellen Sie sicher, daß die Kennungsbrücken installiert sind. Siehe Abbildung 2, 4, 5, und 6. 4.
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. Abbildung 10 zeigt die Steckerbelegung für den Gleichstromanschluß.
34 ST12450W/WD Installation Guide, Rev. B Note. Signal ground on the power control board (PCB) and the head and disc assembly (HDA) are connected together in this drive and you cannot separate them. The equipment in which you have mounted the drive is connected directly to the HDA and PCB without electrically isolating shock mounts. Maximizing the conductive contact area between HDA ground and system ground may reduce radiated emissions.
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. 5. Replace the host system’s cover. 5. Setzen Sie das Gehäuseoberteil des Host-Systems wieder auf.
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. 1. Turn on DC power. 2. Boot the system from a system floppy disc or from a previously installed hard disc drive if there is one. 3. Format the disc drive.
Seagate Technology, Inc. 920 Disc Drive, Scotts Valley, CA 95066-4544, USA Publication Number: 83328890, Rev.
