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Elite Disc Drive
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ST43400N/ND
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User’s Manual
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ii Contents Preface .................................................................................................... iii Electrostatic discharge protection ........................................................ iii Important safety information and precautions ...................................... iv Technical support services .................................................................. vi Section 1. General description ................................................................
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ST43400N/ND User’s Manual iii Preface This manual contains information for users of the Seagate ST43400N and ST43400ND Elite disc drives employing the SCSI interface. It provides instal- lation, operation, and maintenance information. This manual also lists the part numbers for options and accessories available for these drives. Additional information is available in the reference manual (publication 83327640). Electrostatic discharge protection Caution. Removal of circuit boards by personnel no
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iv Important safety information and precautions Caution. Use forced-air ventilation when bench-testing the drive to ensure proper cooling of drive components. Use proper safety and repair techniques for safe, reliable operation of this unit. Service should be done only by qualified persons. We recommend the proce- dures in this manual as effective ways of servicing the unit. Some procedures require the use of special tools. For proper maintenance and safety, you must use these tools as recommend
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ST43400N/ND User’s Manual v • Do not remove the head and disc assembly (HDA) from the drive chassis. Return the entire drive for depot repair if the HDA is defective. • Do not attempt to disassemble the HDA. It is not field repairable. If the sealed HDA is opened by personnel not performing depot repair, this will damage components and void the warranty. As a component, this drive is designed to be installed and operated in accordance with UL1950, IEC950, EN60950, CSA C22.2 950, and VDE0806. Ref
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vi Technical support services Seagate Technology provides technical support literature and diagnostic utili- ties 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, or SeaBOARD services. These are toll calls if you dial from outside of the number’s local dialing area. SeaFAX: (408) 438-2620 You can use a Touch-Tone telephone to access Seagat
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1 Section 1. General description The Seagate ST43400N/ND Elite 3 disc drives are high speed, random access digital data storage devices. They communicate with an initiator using the Small Computer System Interface (SCSI). The drive is shown in Figure 1, and its specifications are listed in Table 1 on the following page. The drive is a component for installation in an enclosure designed for the drive. The enclosure design must ensure adequate cooling for the drive, and it must address the require
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2 Table 1. Drive specifications Characteristics Conditions Specifications Size Dimensions See “Space requirements” in section 2 Weight (drive only) 3.6 kg (8.0 lb) Weight (power supply only) 2.3 kg (5.0 lb) Interface Fast SCSI-2 Recording Total capacity 3,554,871,600 bytes (unformatted) Bytes per track (unformatted) Inner track 49,000 bytes Outer track 72,800 bytes Formatted capacity* (256-byte sectors) 2,538,290,688 bytes (512-byte sectors) 2,916,687,360 bytes (1,024-byte sectors) 3,150,686,208
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General description 3 continued from previous page Characteristics Conditions Specifications SCSI transfer rate, burst 10.0 Mbytes/sec max Seek time (time required to move heads to a different track address— excluding SCSI I/O overhead) Typical full 23.5 msec Typical average 11.5 msec Typical one-track 1.7 msec Typical access times Write Read Typical single track seek msec 1.7 0.9 Average seek msec 11.5 10.5 Maximum seek msec 23.5 22.5 Latency (time required to reach a particular track address a
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4 The drive contains all the circuits and mechanical devices necessary to record data on and recover it from its discs. The drive requires DC voltage input from an external power supply, which receives its AC input power from the site main power source. A power supply and DC power cable are available accessories. The drive consists of a head and disc assembly (HDA) and two circuit boards, mounted on a common chassis. The circuit boards contain the electronics required for drive operation. The HD
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General description 5 Data recorded in Unit concentric tracks Selection Logic Head Selection Heads Logic SCSI Controller Read/Write Logic Discs Initiator I/0 Lines Seek Logic Track Orientation Logic Error Detection Power Supply Logic Figure 2. Drive functional block diagram After arriving at the data track and selecting a head, the controller locates the portion of the track where the data is to be read or written. This is called track orientation. Signals from the drive indicate the beginning
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7 Section 2. Installation The information contained in this section describes installation and initial checkout of the drive. Site requirements The site requirements considered are environment, airflow, space, power, grounding, and interface. Environmental requirements All environmental requirements for the drive are listed in Table 2 below. Table 2. Drive environmental requirements Conditions Specifications Operating environment o o o o Temperature Range of 5 C to 50 C (41 F to 122 F) with a o
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8 Airflow requirements The enclosure design must ensure adequate cooling for the drive. Note that the fan in the power supply cools only the power supply’s internal parts. The drive’s product specification (document 64403601) describes how to evaluate the airflow design. The evaluation consists of ensuring that the case temperatures of certain critical components remain within acceptable limits during drive operation. We recommend orienting the drive or directing the airflow in a way that create
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Installation 9 Above unit Under unit Note. Air flow in the direction shown (front to back) or in reverse direction (back to front) Above unit Note. Air flow in the direction shown or Under unit in reverse direction (side to side) Figure 3. Suggested airflow
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10 Space requirements The drive is designed to be mounted in one of the three orientations shown in Figure 4. The drive may be mounted on its base or on either side. Mounting orientations other than those shown are not permitted. The physical dimen- sions of the drive and power supply are shown in Figure 5. The drive itself weighs 3.6 kg (8.0 lb). For details about designing an enclosure to match the drive mounting dimen- sions, refer to the drive’s product specification. Up Up Up Figure 4. Moun
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Installation 11 Drive 83 mm 3.25 in 204.72 mm 8.06 in max 147 mm 5.75 in Power Supply 70 mm 2.75 in 202 mm 8.00 in 141 mm 5.57 in Figure 5. Dimensions of the drive and power supply
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12 Power requirements The voltage and current requirements for a single drive at cylinder 0 are shown in Table 3. Table 3. Single drive voltage and current requirements Current without Internal Current with Internal Terminator Terminator Seeking Contin- Seeking Contin- and uous and uous Voltage Idle Reading Reading Idle Reading Reading SCSI single-ended interface +5 V 1.87A 1.91 A 2.00A 1.90A 1.96A 2.09A +12 V 1.57A 1.92 A 1.56A 1.57A 1.90A 1.56A Watts 28.19W 32.59 W 28.72W 28.34W 32.60W 29.17W
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Installation 13 AC power requirements for the optional Seagate power supply are listed in Table 4 below. Conversion to the different line voltages is explained in the installation procedures. Table 4. Power supply AC power requirements Nominal Values Specifications 100–120 VAC 208–240 VAC Voltage range 85 to 132 V 175 to 264 V Nominal line frequency 50/60 Hz 50/60 Hz Frequency range 48.0 to 62.0 Hz 48.0 to 62.0 Hz Phase requirements Single phase Single phase Power consumed* 71.5 W 69.5 W Line cu
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14 Term Term SCSI SCSI Device Device 0 7 SCSI SCSI Device Device 1 6 SCSI SCSI Device Device 2 5 SCSI SCSI Device Device 3 4 Figure 6. SCSI bus configuration A connector (J06) at the back of the drive accepts the I/O cable that connects it to the system. The daisychain cable is a continuous unshielded cable having one connector for each drive it connects to. Refer to the reference manual (publication 83327640) for guidelines on I/O cabling. These guidelines discuss the use of unshielded cabling
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Installation 15 Table 5. Unshielded single-ended I/O cabling Signal Name Pin Number DB- (0) 2 DB- (1) 4 DB- (2) 6 DB- (3) 8 DB- (4) 10 DB- (5) 12 DB- (6) 14 DB- (7) 16 DB- (P) 18 GROUND 20 GROUND 22 GROUND 24 TERMPWR 26 GROUND 28 GROUND 30 ATN- 32 GROUND 34 BSY- 36 ACK- 38 RST- 40 MSG- 42 SEL- 44 C/D- 46 REQ- 48 I/O- 50 Notes: 1. All odd pins except 25 must be connected to ground. Pin 25 is open. 2. A minus sign indicates active low.
