○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ BARRACUDA 1 and 2 ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ Disc Drive ○ ○ ○ ○ ○ ○ ○ ○ ST11950N/ND/W/WD ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ST12550N/ND/W/WD ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
Contents Preface .................................................................. Electrostatic discharge protection ........................... Important safety information and precautions ......... Wichtige Sicherheitshinweise ............................... Technical support services ..................................... General description ................................................ Initial setup information ........................................... Kühlung des Systems .........................
ST11950 and ST12550 Installation Guide, Rev. D 1 Preface This manual contains information for users of the Seagate® ST11950N/ND, ST11950W/WD, ST12550N/ND, and ST12550W/WD Barracuda™ SCSI disc drives. It provides support services, performance specifications, and initial setup information. Additional information is available in the Barracuda 1 and 2 Product Manual (part number 83327780). Contact your Seagate sales representative if you need to order this publication.
2 ST11950 and ST12550 Installation Guide, Rev. D • 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.
ST11950 and ST12550 Installation Guide, Rev. D 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 ST11950 and ST12550 Installation Guide, Rev. D • 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 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.
ST11950 and ST12550 Installation Guide, Rev. D 5 dards. Typical applications of these disc drives include customer packaging and subsystem design. Safety agencies conditionally certify component parts, 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.
6 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. Die Verfahren in diesem Handbuch und die Aufkleber auf dem Gerät enthalten Warn- und Vorsichtshinweise.
ST11950 and ST12550 Installation Guide, Rev. D 7 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. • Beachten Sie alle Warn- und Vorsichtshinweise in diesem Handbuch. • Treffen Sie beim Betrieb oder bei der Reparatur der Einheit angemessene Sicherheitsvorkehrungen.
8 ST11950 and ST12550 Installation Guide, Rev. D • 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.
ST11950 and ST12550 Installation Guide, Rev. D 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 ST11950 and ST12550 Installation Guide, Rev. D 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.
ST11950 and ST12550 Installation Guide, Rev. D 11 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 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.
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. The drive is a component for installation in an enclosure designed for the drive.
ST11950 and ST12550 Installation Guide, Rev. D 13 I/O Terminator Packs (single-ended I/O only) SCSI I/O Connector J4 J01 DC Power Connector Figure 1. Barracuda 1 and 2 disc drive (N/ND type) SCSI I/O Connector Pin 1 J5 J4 J01 DC Power Connector Figure 2.
14 ST11950 and ST12550 Installation Guide, Rev. D Characteristics ST11950N/ND ST11950W/WD Interface Fast SCSI-21 Fast & Wide SCSI-2 1 Multi-seg.
ST11950 and ST12550 Installation Guide, Rev. D 15 Characteristics ST12550N/ND ST12550W/WD Interface Fast SCSI-21 Fast & Wide SCSI-21 Multi-seg.
16 ST11950 and ST12550 Installation Guide, Rev. D DC power requirements for ST11950N/ND and ST12550N/ND drives Single-ended Differential +5V +12V +5V +12V ± 5% ± 5%2 ± 5% ± 5%2 Voltage regulation5 Amps Maximum operating current1 1.1 0.95 1.5 0.95 Average idle current 1, 12 0.76 0.83 0.79 0.83 Maximum starting current 1.0 2.18 1.1 2.18 Peak DC3, 6 Peak AC3 − 3.1 − 3.1 Delayed motor start (max)1, 4 1.06 0.19 1.1 0.2 Peak operating current 1.07 0.91 1.47 0.91 Typ DC1, 10 1.1 0.95 1.5 0.
ST11950 and ST12550 Installation Guide, Rev. D 17 DC power requirements for ST11950W/WD and ST12550W/WD drives Single-ended Differential +5V +12V +5V +12V ± 5% ± 5%2 ± 5% ± 5%2 Voltage regulation5 Amps Maximum operating current1 1.04 0.95 1.3 0.95 Average idle current 1, 12 0.76 0.83 0.83 0.83 Maximum starting current 1.0 2.18 1.1 2.18 Peak DC3, 6 Peak AC3 − 3.1 − 3.1 Delayed motor start (max)1, 4 1.0 0.19 1.1 0.19 Peak operating current 1.03 0.91 1.21 0.91 Typ DC1, 10 1.04 0.95 1.3 0.
18 ST11950 and ST12550 Installation Guide, Rev. D continued from previous page 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 Product Manual .
ST11950 and ST12550 Installation Guide, Rev. D 19 continued from previous page 11 No terminator power. See Section 11.7.3.4 in the Product Manual. 12 All power-saving features are enabled. 13 Seeking is defined as a third-stroke seek at OD. The command is issued every 20 msec. 14 Read track is defined as repeat reads of track 15 with a 91% duty cycle. 15 Read track is defined as repeat reads of track 15 with a 75% duty cycle.
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 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).
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 J01 Pin 1 J4 ID1 ID2 Select SCSI ID by placing jumpers as shown below. ID0 J4 SCSI ID = 0 SCSI ID = 1 SCSI ID = 2 SCSI ID = 3 SCSI ID = 4 SCSI ID = 5 SCSI ID = 6 SCSI ID = 7 Figure 3.
22 ST11950 and ST12550 Installation Guide, Rev. D SCSI I/O Connector J5 DC Power Connector Pin 1 Pin 1 4P 3P 2P 1P ID3 ID1 ID2 ID0 J5 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 SCSI ID = 10 SCSI ID = 11 SCSI ID = 12 SCSI ID = 13 SCSI ID = 14 SCSI ID = 15 Figure 4.
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. The top example in Figure 5 shows an internal hard disc at one end of the SCSI bus with the SCSI controller at the other end (both are terminated).
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 improperly can result in damage to the terminators or surrounding components. ST11950N and ST12550N drives To terminate ST11950N and ST12550N drives, install terminator packs as shown in Figure 6. I/O Terminator Packs (single-ended I/O only) Pin 1 End (of terminator) Figure 6.
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.
26 ST11950 and ST12550 Installation Guide, Rev. D J4 Pin 1 J01 EDT PAR DMS RES RES MTR WP Enable Drive Terminators (EDT) J4 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.
ST11950 and ST12550 Installation Guide, Rev. D 27 Terminator power Single-ended (N and W) drives have four valid configurations 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” and “ND” drives J01 Pin 2 J01 location on “W” and “WD” drives J01 Pin 1 Pin 1 Pin 3 Pin 4 Terminator power options. These jumpers determine how termination is supplied. J4 J4 * Terminator power from the drive.
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; however, in most cases, you will not need to change any of these jumpers for normal drive operation.
ST11950 and ST12550 Installation Guide, Rev. D 29 SCSI Connector DC Power Connector J01 Pin 1 J4 MTR PAR DMS J4 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. Disable motor start (default). This causes the drive to start according to the Delay Motor Start option setting as described below.
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 Connector J5 Pin 1 DC Power Connector LED Remote LED Connector* J5 Pin 9 (top pin in this illustration) is negative (cathode), Pin 10 (bottom pin) is positive (anode). *Note to subsystem designers: In Europe, a red LED indicates an error or warning condition.
ST11950 and ST12550 Installation Guide, Rev. D 31 J4 Pin 1 J01 RES PAR DMS RES MTR WP Reserved (RES) J4 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. Disable motor start (default).
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 connect the drives. For N- and ND-type drives, use pins 1 and 2 on the J4 connector to attach the spindle sync cable. Pin 1 provides the reference index signal (REFSIG+) and pin 2 provides ground (GND). See Figure 11.
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 Connector J5 Pin 1 DC Power Connector SSC Spindle Sync Cable Connector (SSC) These pins are used to connect a spindle sync cable. J5 Spindle sync reference index signal (REFSIG+). Ground (GND). Figure 12.
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. To designate a drive as the master, use SCSI interface commands. Refer to the Product Manual for information about using these commands.
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 50 oC. 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.
36 ST11950 and ST12550 Installation Guide, Rev. D Kühlung des Systems Die Gehäusekonstruktion muß eine ausreichende Kühlung des Laufwerkes gewährleisten. Die Umgebungstemperatur darf maximal 50oC betragen. Die Produkthandbuch Barracuda 1 und 2 (Dokument 83327780) enthalten Anweisungen zur Beurteilung der Luftstromkonstruktion. Die Beurteilung muß sicherstellen, daß sich die Gehäusetemperatur bestimmter kritischer Komponenten bei Laufwerkbetrieb innerhalb zugelassener Grenzen hält.
ST11950 and ST12550 Installation Guide, Rev. D 37 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.
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 (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.
ST11950 and ST12550 Installation Guide, Rev. D 39 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.
40 ST11950 and ST12550 Installation Guide, Rev. D T U (1) C (3) R F N D E P K L A M Notes: (1) Mounting holes two on each side, 6-32 UNC. Max screw length into side of drive is 0.15 in. (3.81 mm). (2) Mounting holes four on bottom, 6-32 UNC. Max screw length into bottom of drive is 0.15 in. (3.81 mm). B (3) Power and interface connections. (4) Decorative front panel. (2) Inches G J (4) H S A B C D E F G H J K L M N P R S T U 5.740 4.000 1.615 .615 4.000 .250 1.750 3.750 2.370 5.420 5.565 5.
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 jumpers (see Figures 3, 4, 6, and 7). 3. Stellen Sie sicher, daß die Kennungsbrücken installiert sind. Siehe Abbildung 3, 4, 6, und 7. 4.
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 SELV (safety extra low voltage) nach IEC 950 entsprechen. Abbildung 16 zeigt die Steckerbelegung für den Gleichstromanschluß.
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 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.
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. Replace the host system’s cover. 5. Setzen Sie das Gehäuseoberteil des Host-Systems wieder auf.
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. 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: 83327770, Rev.
