Seagate ST38421A - U4 8.4 GB Hard Drive Product Manual
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Seagate ST38421A - U4 8.4 GB Hard Drive Product Manual

Ultra ata interface drives
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U4 Family
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ST32112A, ST34311A
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ST36421A, ST38421A
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Ultra ATA Interface Drives
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Product Manual
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Summary of Contents for Seagate ST38421A - U4 8.4 GB Hard Drive

  • Page 1 ........U4 Family ......... . ST32112A, ST34311A .
  • Page 3 ........U4 Family ......... . ST32112A, ST34311A .
  • Page 4 1999 Seagate Technology, Inc. All rights reserved Publication Number: SG35116-001, Rev. D, June 1999 Seagate, Seagate Technology, the Seagate logo and U4 are either trademarks or registered trademarks of Seagate Technology, Inc. Other product names are registered trademarks or trademarks of their owners.

  • Page 5: Table Of Contents

    U4 Family Product Manual, Rev. D Contents Specification summary table ......2 1.0 Drive specifications .
  • Page 6 U4 Family Product Manual, Rev. D 2.0 Configuring and mounting the drive ....17 2.1 Handling and static-discharge precautions ....17 2.2 Jumper settings .
  • Page 7 U4 Family Product Manual, Rev. D Figures Figure 1. Typical startup and operation current profile ... . 9 Figure 2. Master/slave jumper settings ..... . . 18 Figure 3.
  • Page 8 U4 Family Product Manual, Rev. D.
  • Page 9 U4 Family Product Manual, Rev. D Introduction This manual describes the functional, mechanical and interface specifi- cations for the U4 ST38421A, ST36421A, ST34311A and the ST32112A. These drives provide the following key features: • Low power consumption • Quiet operation •...

  • Page 10: Specification Summary Table

    U4 Family Product Manual, Rev. D Specification summary table The specifications listed in this table are for quick reference. For details on specification measurement or definition, see the appropriate section of this manual. Drive Specification ST32112A ST34311A ST36421A ST38421A Guaranteed Mbytes ( 10 bytes) 2,160...
  • Page 11 U4 Family Product Manual, Rev. D Drive Specification ST32112A ST34311A ST36421A ST38421A Track-to-track seek time (msec typical) 2.0 (read), 2.75 (write) Average seek time (msec typical) 10.5 (read), 11.5 (write) Full-stroke seek time (msec typical) 24.0 (read), 26.0 (write) Average latency (msec) 5.56 msec Power-on to ready (sec typical)
  • Page 12 U4 Family Product Manual, Rev. D Drive Specification ST32112A ST34311A ST36421A ST38421A Vibration, nonoperating 5 Gs (0 to peak, 5–350 Hz) Drive acoustics Sound power 3.3 (typical), 3.7(max) Idle mode 3.9 (typical), 4.3 (max) Seek mode Nonrecoverable read errors 1 per 10 bits read Mean time between failures (power-on hours)

  • Page 13: Drive Specifications

    U4 Family Product Manual, Rev. D 1.0 Drive specifications Unless otherwise noted, all specifications are measured under ambient conditions, at 25°C, and nominal power. For convenience, the phrases the drive and this drive are used throughout this manual to indicate the U4 ST38421A, ST36421A, ST34311A and the ST32112A.

  • Page 14: Recording And Interface Technology

    U4 Family Product Manual, Rev. D 1.3 Recording and interface technology Interface Recording method 16/17 EPRML Recording density BPI (bits/inch) 241,000 Track density TPI (tracks/inch) 13,100 Areal density (Mbits/inch max) 3,179 Spindle speed (RPM) ( 0.2%) 5,400 Internal data-transfer rate (Mbits/sec max) I/O data-transfer rate 16.6 (PIO mode 4)

  • Page 15: Start/Stop Times

    U4 Family Product Manual, Rev. D • Average seek time is a true statistical random average of at least 5,000 measurements of seeks between random tracks, less overhead. • Full-stroke seek time is one-half the time needed to seek from the first data cylinder to the maximum data cylinder and back to the first data cylinder.
  • Page 16 U4 Family Product Manual, Rev. D • Seek Mode During seek mode, the read/write actuator arm moves toward a specific position on the disc surface and does not execute a read or write operation. Servo electronics are active. Seek mode power rep- resents the worst-case power consumption, using only random seeks with read or write latency time.

  • Page 17: Figure 1. Typical Startup And Operation Current Profile

    U4 Family Product Manual, Rev. D Typical Amps RMS Power Mode Typical Watts Spinup — — 1.5 (peak) Seek (Random, no read/write) 0.39 0.42 Operating 0.34 0.33 Idle 0.24 0.16 Standby/Sleep 0.14 0.01 1.7.1.1 Typical current profile Figure 1 shows a typical current profile. Current (amps) Time (seconds) Figure 1.

  • Page 18: Conducted Noise

    U4 Family Product Manual, Rev. D 1.7.2 Conducted noise Input noise ripple is measured at the host system power supply across an equivalent 80-ohm resistive load on the +12 volt line or an equivalent 15-ohm resistive load on the +5 volt line. •...

  • Page 19: Environmental Tolerances

    U4 Family Product Manual, Rev. D drive buffer is enabled, the heads are parked and the spindle is at rest. The drive accepts all commands and returns to Active mode any time disc access is necessary. • Sleep mode The drive enters Sleep mode after receiving a Sleep command from the host.

  • Page 20: Altitude

    U4 Family Product Manual, Rev. D 1.8.3.2 Wet bulb temperature Operating 29.4°C (84°F) max Nonoperating 40.0°C (104°F) max 1.8.4 Altitude Operating –61 m to 3,048 m (–200 ft to 10,000+ ft) Nonoperating –122 m to 12,192 m (–400 ft to 40,000+ ft) 1.8.5 Shock All shock specifications assume that the drive is mounted securely with the input shock applied at the drive mounting screws.

  • Page 21: Drive Acoustics

    U4 Family Product Manual, Rev. D 1.8.6.1 Operating vibration The following table lists the maximum vibration levels that the drive may expe- rience while meeting the performance standards specified in this document. 5–21 Hz 0.02-inch displacement (peak to peak) 22–350 Hz 0.5 Gs acceleration (zero to peak) 351–500 Hz 0.3 Gs acceleration (zero to peak)

  • Page 22: Electromagnetic Susceptibility

    Electromagnetic Compatibility Directives. Testing is performed to standards EN50082-1 and EN55022-B. Seagate uses an independent laboratory to confirm compliance with the EC directives specified in the previous paragraph. Drives are tested in representative end-user systems. Although CE-marked Seagate drives...

  • Page 23: Fcc Verification

    Communications Commission verification or certification of the device is required. Seagate Technology, Inc. has tested this device in enclosures as de- scribed above to ensure that the total assembly (enclosure, disc drive, motherboard, power supply, etc.) does comply with the limits for a Class B computing device, pursuant to Subpart J, Part 15 of the FCC rules.
  • Page 24 U4 Family Product Manual, Rev. D If necessary, you should consult your dealer or an experienced radio/ television technician for additional suggestions. You may find helpful the following booklet prepared by the Federal Communications Commis- sion: How to Identify and Resolve Radio-Television Interference Prob- lems .

  • Page 25: Configuring And Mounting The Drive

    U4 Family Product Manual, Rev. D 2.0 Configuring and mounting the drive This section contains the specifications and instructions for configuring and mounting the drive. 2.1 Handling and static-discharge precautions After unpacking, and before installation, the drive may be exposed to potential handling and electrostatic discharge (ESD) hazards.

  • Page 26: Jumper Settings

    U4 Family Product Manual, Rev. D 2.2 Jumper settings 2.2.1 Master/slave configuration The options jumper block (J8) shown in Figure 2 is used to configure the drive for operation. It is the 6-pin dual header between the I/O connector and the power connector. Use the following settings to configure the drive as a master or a slave.

  • Page 27: Cable-Select Option

    U4 Family Product Manual, Rev. D 2.2.2 Cable-select option Computers that use cable-select determine the master and slave drives by selecting or deselecting pin 28, CSEL, on the interface bus. Master and slave drives are determined by their physical position on the cable. To enable cable select, set a jumper on pins 5 and 6 as shown in Figure 2 on page 18.

  • Page 28: Figure 3. Mounting Dimensions-Top, Side And End View

    U4 Family Product Manual, Rev. D Note: Dimensions are shown in inches (mm). 0.180 ± 0.015 1.00 ± 0.028 (4.57 ± 0.38) 25.4 ± 0.7) 0.230 ± 0.015 (5.84 ± 0.38 2.23 ± 0.03 (56.6 ± 0.8 3X 6-32 UNC-2B 3.72 ±...

  • Page 29: Ata Interface

    U4 Family Product Manual, Rev. D 3.0 ATA interface These drives use the industry-standard ATA task file interface that supports 16-bit data transfers. It supports ATA programmed input/output (PIO) modes 0–4; multiword DMA modes 0–2, and Ultra DMA modes 0–4. The drive also supports the use of the IORDY signal to provide reliable high-speed data transfers.

  • Page 30: Figure 4. I/O Pins And Supported Ata Signals

    U4 Family Product Manual, Rev. D Drive pin # Host pin # and signal description Signal name Reset – Hardware Reset Ground Ground Host Data Bus Bit 7 Host Data Bus Bit 8 Host Data Bus Bit 6 Host Data Bus Bit 9 Host Data Bus Bit 5 DD10 Host Data Bus Bit 10...

  • Page 31: Ata Interface Commands

    U4 Family Product Manual, Rev. D 3.2 ATA Interface commands 3.2.1 Supported ATA commands The following table lists ATA-standard commands that the drive sup- ports. For a detailed description of the ATA commands, refer to the Draft ATA-4 Standard. See Section 3.2.4 on page 30 for details and subcom- mands used in the S.M.A.R.T.

  • Page 32: Identify Drive Command

    U4 Family Product Manual, Rev. D Command name Command code (in hex) Write Sectors ATA-standard power-management commands Check Power Mode or E5 Idle or E3 Idle Immediate or E1 Sleep or E6 Standby or E2 Standby Immediate or E0 ATA-standard security commands Security Set Password Security Unlock Security Erase Prepare...
  • Page 33 U4 Family Product Manual, Rev. D Word Description Value Configuration information: Bit 15: 0 = ATA; 1 = ATAPI • 0C5A Bit 7: removable media • Bit 6: removable controller • Bit 0: reserved • 1060 (ST32112A) Number of logical cylinders: 22F0 ST32112A = 4,192 (ST34311A)
  • Page 34 U4 Family Product Manual, Rev. D Word Description Value 27–46 Drive model number: (40 ASCII char- ST32112A ST34311A acters, padded with blanks to end of ST36421A string) ST38421A (Bits 7–0) Maximum sectors per inter- 8010 rupt on Read multiple and Write mul- tiple (16) Reserved 0000...
  • Page 35 U4 Family Product Manual, Rev. D Word Description Value Multiword DMA active and modes xx 07 supported (see note following this table) Advanced PIO modes supported 0003 (modes 3 and 4 supported) Minimum multiword DMA transfer 0078 cycle time per word (120 nsec) Recommended multiword DMA 0078 transfer cycle time per word (120...
  • Page 36 (see description following this table) 94–127 ATA-reserved 0000 Security Status 0001 129–159 Seagate-reserved xxxx 160–255 ATA-reserved 0000 Note. See the bit descriptions below for words, 63, 88, and 93 of the Identify Drive data: Description (if bit is set to 1) Word 63 Multiword DMA mode 0 is supported.

  • Page 37: Set Features Command

    U4 Family Product Manual, Rev. D Ultra DMA mode 3 is currently active. Ultra DMA mode 4 is currently active. Word 93 1=80-conductor cable detected, CBLID above V 0=40-conductor cable detected, CBLID below V 3.2.3 Set Features command This command controls the implementation of various features that the drive supports.

  • Page 38: Commands

    U4 Family Product Manual, Rev. D Disable read look-ahead (read cache) feature. Disable write cache. Enable read look-ahead (read cache) feature (default). Note. At power-on, or after a hardware or software reset, the default values of the features are as indicated above. 3.2.4 S.M.A.R.T.
  • Page 39 U4 Family Product Manual, Rev. D...
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  • Page 42 U4 Family Product Manual, Rev. D Seagate Technology, Inc. 920 Disc Drive, Scotts Valley, California 95066, USA Publication Number: SG35116-001, Rev. D, Printed in USA...

This manual is also suitable for:

U4 familyU4 seriesSt32112aSt34311aSt36421aSt38421a

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