○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ BARRACUDA 2LP ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ Disc Drive ○ ○ ○ ○ ○ ○ ○ ○ ST31250N/ND ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ST31250W/WD/WC/DC ○ ○ ○ ○ ○ ○ ○ ○ ○
Contents Preface .................................................................. 1 Electrostatic discharge protection ........................... 1 Important safety information and precautions ......... 2 Wichtige Sicherheitshinweise ............................... 5 Technical support services ..................................... 10 General description ................................................ 13 Initial setup information ........................................... 19 Kühlung des Systems ........
Barracuda 2LP Installation Guide, Rev. E 1 Preface This manual contains information for users of the Seagate® ST31250 and ST32550 Barracuda™ 2LP SCSI disc drives. It provides support services, performance specifications, and initial setup information. Additional information is available in the Barracuda 2LP Product Manual (part number 83328930). Contact your Seagate sales representative if you need to order this publication. Electrostatic discharge protection Caution.
2 Barracuda 2LP Installation Guide, Rev. E • 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.
Barracuda 2LP Installation Guide, Rev. E 3 The procedures in this manual and labels on the unit contain warnings and cautions that must be carefully 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.
4 Barracuda 2LP Installation Guide, Rev. E • 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.
Barracuda 2LP Installation Guide, Rev. E 5 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.
6 Barracuda 2LP Installation Guide, Rev. E werden. Wir empfehlen die Verfahren indiesem 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.
Barracuda 2LP Installation Guide, Rev. E 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 Barracuda 2LP Installation Guide, Rev. E • 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.
Barracuda 2LP Installation Guide, Rev. E 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 Barracuda 2LP Installation Guide, Rev. E 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.
Barracuda 2LP Installation Guide, Rev. E 11 SeaFONE: (408) 438-8222 Technical support specialists are available from 8:00 A.M. to 5:00 P.M. PST, Monday through Friday. Recorded technical information on selected Seagate products is provided while you are on hold. Recordings are accessible 24 hours a day, 7 days a week. SeaTDD: (408) 438-5382 TDD is a telecommunication device for the deaf where two people can communicate using a keyboard connected to the phone line.
12 Barracuda 2LP Installation Guide, Rev.
Barracuda 2LP Installation Guide, Rev. E 13 General description Barracuda 2LP SCSI disc drives are high-speed, random-access digital-data storage devices. The drive is a component for installation in an enclosure designed for the drive. This is often a rack within the system or an external enclosure designed to house one or more disc drives or other peripheral units.
14 Barracuda 2LP Installation Guide, Rev. E Characteristics ST31250 ST32550 Interface Fast SCSI-2 Fast SCSI-21 Capacity Unformatted Formatted2 1,205.3 Mbytes 1,020.9 Mbytes 2,541.3 Mbytes 2,147.4 Mbytes Recording Cylinders (user) Read/write data heads Servo heads Avg bytes/track 3,711 5 1 64,160 3,510 11 1 64,160 Seek time3 Average read Average write 8.0 msec 9.0 msec 8.0 msec 9.0 msec Disc rotation RPM Average latency 7,200 4.17 msec 7,200 4.17 msec 47.5 to 72.0 49.4 to 72.
Barracuda 2LP Installation Guide, Rev. E 1 Can also be operated according to SCSI-1 protocol. factory units are formatted as follows: 512 data bytes per sector 9 spare sectors per cylinder 1 cylinder at the innter track reserved for spares 3 Not including on-board controller overhead.
16 Barracuda 2LP Installation Guide, Rev. E DC power requirements Voltage regulation5 Maximum operating current1 Maximum starting current Peak DC3, 6 Peak AC3 Delayed motor start (max)1,4 Peak operating current Typ DC1, 10 Max DC1 Max (peak) Track following (DC) at OD1 at ID1 Read track OD DC1, 14 AC Seeking Typical DC1, 13 Maximum DC1 Maximum (peak) AC Single-ended Differential + 5V11 + 12V + 5V11 + 12V ± 5% ± 5%2 ± 5% ± 5%2 Amps 0.93 0.6 1.17 0.6 0.93 − 0.88 1.35 1.93 0.12 1.00 − 0.92 1.35 1.93 0.
Barracuda 2LP Installation Guide, Rev. E 1 17 Measured with an average reading DC ammeter. Instantaneous +12V current peaks will exceed these values. 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.
18 11 No Barracuda 2LP Installation Guide, Rev. E terminator power. See Section 11.7.3.4 in the Barracuda 2LP Product Manual. 12 All power-saving features are enabled (ASA II code only). 13 Seeking is defined as a third-stroke seek at OD. The command is issued every 20 msec.
Barracuda 2LP Installation Guide, Rev. E 19 Initial setup information The general information beginning on this page applies to all of the Barracuda 2LP drive models. After reading the general information topics, refer to the appropriate drivespecific section listed below for additional information about configuring and installing your particular model.
20 Barracuda 2LP Installation Guide, Rev. E *This mounting procedure does not apply to WC or DC model drives. To mount a WC or DC drive, plug the drive into the system's single connector attachment (SCA) position on the system's back panel. SCSI ID jumpers Each device on the SCSI chain must have a unique SCSI ID.
Barracuda 2LP Installation Guide, Rev. E 21 Also check your system or controller user’s manual to ensure that you have not violated its SCSI ID numbering recommendations. Drive termination If you are installing a Barracuda 2LP 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.
22 Barracuda 2LP Installation Guide, Rev. E For information about how to terminate your drive, refer to the appropriate drive-specific section. Terminator power You usually will not need to change this option and can normally leave the drive configured as it was shipped from the factory. For information about how to change the terminator power option on your drive, refer to the appropriate drive-specific section.
Barracuda 2LP Installation Guide, Rev. E 23 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 (83328930) 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.
24 Barracuda 2LP Installation Guide, Rev. E Kühlung des Systems Die Gehäusekonstruktion muß eine ausreichende Kühlung des Laufwerkes gewährleisten. Die Umgebungstemperatur darf maximal 50oC betragen. Die Produkthandbuch Barracuda 2LP (Dokument 83328930) enthalten Anweisungen zur Beurteilung der Luftstromkonstruktion. Die Beurteilung muß sicherstellen, daß sich die Gehäusetemperatur bestimmter kritischer Komponenten bei Laufwerkbetrieb innerhalb zugelassener Grenzen hält.
Barracuda 2LP Installation Guide, Rev. E 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.
26 Barracuda 2LP Installation Guide, Rev. E 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.
Barracuda 2LP Installation Guide, Rev. E 27 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.
28 Barracuda 2LP Installation Guide, Rev. E 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. 3. Stellen Sie sicher, daß die Kennungsbrücken installiert sind. 4. Connect the 50-pin SCSI cable into the drive’s SCSI connector (shown earlier in Figure 1).
Barracuda 2LP Installation Guide, Rev. E 29 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 4 zeigt die Steckerbelegung für den Gleichstromanschluß. Zum Anschluß des Gleichstromkabels an das Laufwerk das Kabelende in den Gleichstromanschluß des Laufwerkes stecken.
30 Barracuda 2LP Installation Guide, Rev. E 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.
Barracuda 2LP Installation Guide, Rev. E 31 Systemgehäuse nicht an die HDA/PCB-Erdung anschließen wollen, müssen Sie das Laufwerk auf nichtleitende Weise (galvanisch isoliert) im HostSystem 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. Formatting the drive Warning. Formatting a drive erases all user data.
32 Barracuda 2LP Installation Guide, Rev. E Enabling write cache Write caching is a feature that allows the drive to transfer write data to its own cache, tell the controller that the task is complete, and then actually complete the write at a later time. This improves write performance by freeing the CPU to go on to its next command. Warning.
Barracuda 2LP Installation Guide, Rev. E 33 N/ND drives Setting the SCSI ID jumpers Use the J4 connector to set the SCSI ID (see Figure 5). To change the SCSI ID, install jumpers on the appropriate pins as shown in the illustration. J4 Pin 1 (front view of J4) J4 Pin 2 Pin 1 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 Figure 5.
34 Barracuda 2LP Installation Guide, Rev. E N/ND drives Terminating the drive ST31250N and ST32550N drives are terminated with permanently mounted IC active terminators. If you install one of these drives and it is not on the end of the SCSI bus, disable the terminators by removing the jumper from pins 5 and 6 of connector J1 (see Figure 6). If you install the drive on the end of the SCSI bus, enable termination by installing a jumper on pins 5 and 6 of connector J1. Note.
Barracuda 2LP Installation Guide, Rev. E 35 N/ND drives Terminator power There are four possible terminator power configurations for ST31250N and ST32550N drives (see Figure 7). You will not normally need to change this option and can leave the drive configured as it was shipped from the factory. ST31250ND and ST32550ND drives should be configured with a jumper connecting J1 pins 1 and 3 (and no jumper on J1 pins 2 and 4) as illustrated in Figure 7.
36 Barracuda 2LP Installation Guide, Rev. E N/ND drives Synchronizing spindles Use pins 5 and 6 on the J4 connector to attach the spindle sync cable. See Figure 8. Pin 1 J2 J4 Pin 1 (front view of J4) J4 Pin 2 Pin 1 Spindle sync cable connector Figure 8.
Barracuda 2LP Installation Guide, Rev. E 37 N/ND drives Other applicable jumper options Several other jumper options are available as illustrated. J2 Pin 2 Pin 1 Reserved Parity Check option Enable parity check of SCSI bus (default). Pin 1 J2 Disable parity check. J4 J4 Pin 1 (front view of J4) Pin 2 Pin 1 Reserved Remote LED connector* * Note to subsystem designers: In Europe, a red LED indicates an error or warning condition.
38 Barracuda 2LP Installation Guide, Rev. E W/WD drives Setting the SCSI ID jumpers Use the J5 connector to set the SCSI ID (Figure 10). To change the SCSI ID, install jumpers on the appropriate pins as shown in the illustration.
Barracuda 2LP Installation Guide, Rev. E 39 W/WD drives Terminating the drive ST31250W and ST32550W drives are terminated with permanently mounted IC active terminators. If you install one of these drives and it is not on the end of the SCSI bus, disable the terminators by removing the jumper from pins 5 and 6 of connector J1. If you install the drive on the end of the SCSI bus, enable termination by installing a jumper on pins 5 and 6 of connector J1 (see Figure 11). Note.
40 Barracuda 2LP Installation Guide, Rev. E W/WD drives Terminator power There are four possible terminator power configurations for ST31250W and ST32550W drives (see Figure 12). You will not normally need to change this option and can leave the drive configured as it was shipped from the factory. ST31250WD and ST32550WD drives should be configured with a jumper connecting J1 pins 1 and 3 (and no jumper on J1 pins 2 and 4) as illustrated in Figure 12.
Barracuda 2LP Installation Guide, Rev. E 41 W/WD drives Synchronizing spindles Use pins 11 and 12 on the J5 connector to attach the spindle sync cable. See Figure 13. SCSI I/O Connector Pin 1 DC Power Connector Pin 1 J5 4P 3P 2P 1P SS J5 Spindle sync cable connector Spindle Sync Reference Spindle Sync Ground Figure 13.
42 Barracuda 2LP Installation Guide, Rev. E W/WD drives Other applicable jumper options Other option jumpers are available as illustrated below. Pin 1 J2 J2 Pin 2 Pin 1 Reserved Parity Check option Enable parity check of SCSI bus (default). Disable parity check. Write Protect option Write protect = Off (enables writing – default) Write protect = On (disables writing) Motor Start option Enable motor start. The drive waits for the Start Unit command from the host before starting the spindle motor.
Barracuda 2LP Installation Guide, Rev. E 43 W/WD drives Pin 1 J2 SCSI I/O Connector Pin 1 Pin 1 J5 GND (cathode) POS (anode) Remote unit active LED connector J4 J4 Pin 1 (front view of J4) Pin 2 Pin 1 SCSI ID = 0 Fault LED pin (+) SCSI ID = 1 Vendor Unique SCSI ID = 2 SSREF (+) SCSI ID = 3 Unit Active LED pin (+) Enable termination Ground +5 volts Not connected Reserved Figure 14b.
44 Barracuda 2LP Installation Guide, Rev. E WC/DC drives Setting the SCSI ID jumpers The SCSI ID for WC drives is normally set over the SCSI bus by the host system using connector contacts 39 (ID0), 40 (ID2), 79 (ID1), and 80 (ID3). Systems designers may, optionally, install a remote operator panel connection to set the SCSI ID. Figure 15b illustrates the SCSI ID pins used for this purpose.
Barracuda 2LP Installation Guide, Rev. E 45 WC/DC drives Applicable jumper options Option jumpers are available as illustrated below. Pin 1 J2 J2 Pin 2 Pin 1 Reserved Parity Check option Enable parity check of SCSI bus (default). Disable parity check. Write Protect option Write protect = Off (enables writing – default) Write protect = On (disables writing) Motor Start option Enable motor start. The drive waits for the Start Unit command from the host before starting the spindle motor.
46 Barracuda 2LP Installation Guide, Rev. E WC/DC drives Pin 1 J2 J4 J4 Pin 1 (front view of J4) Pin 2 Pin 1 SCSI ID = 0 Fault LED pin (–) SCSI ID = 1 Vendor Unique SCSI ID = 2 SSREF (+) SCSI ID = 3 Unit Active LED pin (–) Not used Ground +5 volts Not connected Reserved Figure 15b.
Seagate Technology, Inc. 920 Disc Drive, Scotts Valley, CA 95066-4544, USA Publication Number: 83328920, Rev.
