Seagate BARRACUDA ST11950N/ND/W/WD Installation Manual
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Seagate BARRACUDA ST11950N/ND/W/WD Installation Manual

Seagate BARRACUDA ST11950N/ND/W/WD Installation Manual

Scsi disc drives
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BARRACUDA 1 and 2
Disc Drive
ST11950N/ND/W/WD
ST12550N/ND/W/WD
Installation Guide

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Summary of Contents for Seagate BARRACUDA ST11950N/ND/W/WD

  • Page 1 BARRACUDA 1 and 2 Disc Drive ST11950N/ND/W/WD ST12550N/ND/W/WD Installation Guide...

  • Page 2: Table Of Contents

    General description ... 12 Initial setup information ... 19 Kühlung des Systems ... 36 Installation des Laufwerkes und Anschluß der Kabel ... 39 © 1994 Seagate Technology, Inc. All rights reserved Publication Number: 83327770, Rev. D June 1994 ® Seagate , Seagate Technology are registered trademarks of Seagate Technology, Inc.

  • Page 3: Preface

    Additional information is available in the Barracuda 1 and 2 Product Manual (part number 83327780). Contact your Seagate sales rep- resentative if you need to order this publication. Electrostatic discharge protection Caution.

  • Page 4: Important Safety Information And Precautions

    • 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.
  • Page 5 ST11950 and ST12550 Installation Guide, Rev. D 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.
  • Page 6 As a component, this drive is designed to be installed and operated in accordance with UL1950, IEC950, EN60950, CSA C22.2 950, and VDE0805. Seagate takes all reasonable steps to ensure that its products are certifiable to currently accepted stan-...

  • Page 7: Wichtige Sicherheitshinweise

    This unit is a component assembly and as such is not meant to comply with FCC or similar national require- ments as a stand-alone unit. Engineering radiated emis- sions test results are available through the Seagate Safety Department to assist the subsystem designer. Wichtige Sicherheitshinweise Vorsicht.
  • Page 8 ST11950 and ST12550 Installation Guide, Rev. D dürfen nur von qualifiziertem Fachpersonal 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.
  • Page 9 ST11950 and ST12550 Installation Guide, Rev. D zuerst sicher, daß das gewählte Verfahren weder Ihre 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. •...
  • Page 10 Garantieanspruchs zur Folge. Als Teilkomponente ist dieses Laufwerk für die Installa- tion und den Betrieb in Übereinstimmung mit UL 1950, IEC950, EN60950, CSA C22.2 950 und VDE0805 vorgesehen. Seagate ist ständig bemüht, die Zulassungsfähigkeit von Seagate-Produkten im Rahmen der gegenwärtig...
  • Page 11 Versorgungsspannungen des Laufwerks. Dieses Gerät ist eine Baugruppe und unterliegt als solche nicht den Anforderungen der FCC oder ähnlicher nationaler Behörden für eigenständige Geräte. Technische Testergebnisse zu elektromagnetische Strahlung sind für Designer von Untersystemen auf Anfrage von der Seagate-Sicherheitsabteilung erhältlich.

  • Page 12: Technical Support Services

    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.
  • Page 13 5:00 . PST, Monday through Friday. SeaBOARD The Seagate Technical Support Bulletin Board System (BBS) is accessible by modem 24 hours a day, 7 days a week. The communications software must be set for eight data bits, no parity, and one stop bit (8N1). These BBS numbers operate at 9600 baud max.

  • Page 14: General Description

    12 ST11950 and ST12550 Installation Guide, Rev. D General description Barracuda 1 and 2 SCSI disc drives are high-speed, random-access digital-data storage devices. The ST11950N/ND and ST12550N/ND drives are illustrated in Figure 1, and the ST11950W/WD and ST12550W/WD drives are illustrated in Figure 2. Specifications and DC power requirements for the drive are listed in tables following the figure.
  • Page 15 ST11950 and ST12550 Installation Guide, Rev. D 13 I/O Terminator Packs (single-ended I/O only) SCSI I/O Connector DC Power Connector Figure 1. Barracuda 1 and 2 disc drive (N/ND type) SCSI I/O Connector Pin 1 DC Power Connector Figure 2. Barracuda 1 and 2 disc drive (W/WD type) J4 J01...
  • Page 16 ST11950 and ST12550 Installation Guide, Rev. D Characteristics ST11950N/ND Interface Fast SCSI-2 Multi-seg. cache 1,024 Kbytes Capacity Unformatted 2,030 Mbytes Formatted 1,690 Mbytes Recording Cylinders (user) 2,706 Heads Avg sectors/track 81 (51h) Avg bytes/track 49,768 Modulation RLL 1,7 code SCSI rate Max burst transfer 10 Mbytes/sec Seek time...
  • Page 17 ST11950 and ST12550 Installation Guide, Rev. D Characteristics ST12550N/ND Interface Fast SCSI-2 Multi-seg. cache 1,024 Kbytes Capacity Unformatted 2,572 Mbytes Formatted 2,139 Mbytes Recording Cylinders (user) 2,707 Heads Avg sectors/track 81 (51h) Avg bytes/track 49,768 Modulation RLL 1,7 code SCSI rate Max burst transfer 10 Mbytes/sec Seek time...
  • Page 18 ST11950 and ST12550 Installation Guide, Rev. D DC power requirements for ST11950N/ND and ST12550N/ND drives Single-ended Voltage regulation Maximum operating current 1, 12 Average idle current 0.76 Maximum starting current 3, 6 Peak DC Peak AC 1, 4 Delayed motor start (max) 1.06 Peak operating current 1, 10...
  • Page 19 ST11950 and ST12550 Installation Guide, Rev. D DC power requirements for ST11950W/WD and ST12550W/WD drives Single-ended Voltage regulation Maximum operating current 1.04 1, 12 Average idle current 0.76 Maximum starting current 3, 6 Peak DC Peak AC 1, 4 Delayed motor start (max) Peak operating current 1, 10 Typ DC...
  • Page 20 18 ST11950 and ST12550 Installation Guide, Rev. D continued from previous page 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.

  • Page 21: Initial Setup Information

    ST11950 and ST12550 Installation Guide, Rev. D 19 continued from previous page No terminator power. See Section 11.7.3.4 in the Prod- uct Manual. All power-saving features are enabled. Seeking is defined as a third-stroke seek at OD. The command is issued every 20 msec. Read track is defined as repeat reads of track 15 with a 91% duty cycle.
  • Page 22 20 ST11950 and ST12550 Installation Guide, Rev. D 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 (ID7 in non-wide sys- tems);...
  • Page 23 ST11950 and ST12550 Installation Guide, Rev. D 21 Also check your system or controller user’s manual to ensure that you have not violated its SCSI ID numbering recommendations. SCSI Connector DC Power Connector Select SCSI ID by placing jumpers as shown below. SCSI ID = 0 SCSI ID = 1 SCSI ID = 2...
  • Page 24 22 ST11950 and ST12550 Installation Guide, Rev. D SCSI I/O Pin 1 Connector Pin 1 SCSI ID = 0 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...
  • Page 25 ST11950 and ST12550 Installation Guide, Rev. D 23 Terminating the drive If you are installing the 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.
  • Page 26 24 ST11950 and ST12550 Installation Guide, Rev. D Refer to the appropriate section below for instructions in terminating a drive. Caution. Installing or removing terminator packs im- properly can result in damage to the termina- tors or surrounding components. ST11950N and ST12550N drives To terminate ST11950N and ST12550N drives, install terminator packs as shown in Figure 6.
  • Page 27 ST11950 and ST12550 Installation Guide, Rev. D 25 Note. All single-ended terminators must be ANSI SCSI-2 alternative 2 active terminators. To install terminators, carefully insert the terminator’s pins firmly into the socket’s holes. Note that pin 1 on the pack is identified by a dot, a number one, or a notch. To remove termination, remove the terminator packs by carefully pulling them out of their sockets.
  • Page 28 26 ST11950 and ST12550 Installation Guide, Rev. D Pin 1 Enable Drive Terminators (EDT) Enable drive terminators. Disable drive terminators. Figure 7. Enabling termination on ST11950W and ST12550W drives ST11950ND/WD and ST12550ND/WD drives ST11950ND/WD and ST12550ND/WD drives have no provisions for internal termination. To terminate these drives, you must provide external termination.

  • Page 29: Terminator Power

    ST11950 and ST12550 Installation Guide, Rev. D 27 Terminator power Single-ended (N and W) drives have four valid configu- rations for terminator power (see Figure 8). Differential (ND and WD drives) must be configured with a jumper on J01 pins 1 and 3 only. J01 location on “N”...
  • Page 30 28 ST11950 and ST12550 Installation Guide, Rev. D Changing other applicable jumper options Barracuda 1 and 2 drives are designed to be used in a variety of systems. Unique installations may require you to change one or more of the other jumpers to meet specific system requirements;...
  • Page 31 ST11950 and ST12550 Installation Guide, Rev. D 29 SCSI Connector DC Power Connector Parity Check option (PAR) Enable parity check of SCSI bus data (default). Disable parity check. 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.
  • Page 32 30 ST11950 and ST12550 Installation Guide, Rev. D Figures 10a and 10b provide the information necessary to configure all W and WD drive jumpers not discussed elsewhere in this manual. SCSI I/O Pin 1 Connector Remote LED Connector* Pin 9 (top pin in this illustration) is negative (cathode), Pin 10 (bottom pin) is positive (anode).
  • Page 33 ST11950 and ST12550 Installation Guide, Rev. D 31 Pin 1 Reserved (RES) Reserved for factory use. Parity Check option (PAR) Enable parity check of SCSI bus data (default). Disable parity check of SCSI bus data. 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.
  • Page 34 32 ST11950 and ST12550 Installation Guide, Rev. D Synchronizing spindles 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 con- nect the drives.
  • Page 35 ST11950 and ST12550 Installation Guide, Rev. D 33 For W- and WD-type 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 12. SCSI I/O Pin 1 Connector...
  • Page 36 34 ST11950 and ST12550 Installation Guide, Rev. D Figure 13 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.
  • Page 37 ST11950 and ST12550 Installation Guide, Rev. D 35 Providing adequate cooling The enclosure design must ensure adequate cooling for the drive. The maximum ambient temperature is The drive’s product manual (83327780) 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.

  • Page 38: Kühlung Des Systems

    36 ST11950 and ST12550 Installation Guide, Rev. D Kühlung des Systems Die Gehäusekonstruktion muß eine ausreichende Kühlung des Laufwerkes gewährleisten. Die Umgebungstemperatur darf maximal 50 C betragen. Die Produkthandbuch Barracuda 1 und 2 (Dokument 83327780) enthalten Anweisungen zur Beurteilung der Luftstromkonstruktion.
  • Page 39 ST11950 and ST12550 Installation Guide, Rev. D 37 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) Note.
  • Page 40 38 ST11950 and ST12550 Installation Guide, Rev. D 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 (horizon- tally, vertically, and any combination thereof);...

  • Page 41: Installation Des Laufwerkes Und Anschluß Der Kabel

    ST11950 and ST12550 Installation Guide, Rev. D 39 Installation des Laufwerkes und Anschluß der Kabel Beachten Sie beim Handhaben und Anfassen der A n s c h l u ß s t i f t e u n d K o m p o n e n t e n Vorsichtsmaßnahmen zur Verhinderung statischer Aufladung.
  • Page 42 40 ST11950 and ST12550 Installation Guide, Rev. D Notes: Figure 15. Dimensions Abbildung 15. Laufwerkabmessungen Mounting holes two on each side, 6-32 UNC. Max screw length into side of drive is 0.15 in. (3.81 mm). Mounting holes four on bottom, 6-32 UNC. Max screw length into bottom of drive is 0.15 in.
  • Page 43 ST11950 and ST12550 Installation Guide, Rev. D 41 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 SCSI ID jump- ers (see Figures 3, 4, 6, and 7).
  • Page 44 42 ST11950 and ST12550 Installation Guide, Rev. D darf nicht gedehnt 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...
  • Page 45 ST11950 and ST12550 Installation Guide, Rev. D 43 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 separate them. The equipment in which you have mounted the drive is connected directly to the HDA and PCB without electrically isolating shock mounts.
  • Page 46 44 ST11950 and ST12550 Installation Guide, Rev. D 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.
  • Page 47 ST11950 and ST12550 Installation Guide, Rev. D 45 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.
  • Page 48 Seagate Technology, Inc. 920 Disc Drive, Scotts Valley, CA 95066-4544, USA Publication Number: 83327770, Rev. D, Printed in USA...

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