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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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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . U4 Family . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ST32112A, ST34311A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ST36421A, ST38421A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ultra ATA Interface Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Product Manual . .
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© 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. Seagate reserves the right to change, without notice, product offerings or specifications. No part of this publication may be reproduced in any form without written permission from Seagate Tec
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U4 Family Product Manual, Rev. D iii Contents Specification summary table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.0 Drive specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.1 Formatted capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.1.1 Default logical geometry . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.2 Physical organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1
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iv 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 2.2.1 Master/slave configuration . . . . . . . . . . . . . . . . . . . . . . 18 2.2.2 Cable-select option . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 2.3 Ultra ATA/66 cable . . . . . . . . . .
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U4 Family Product Manual, Rev. D v Figures Figure 1. Typical startup and operation current profile . . . . . . . . . . . . 9 Figure 2. Master/slave jumper settings . . . . . . . . . . . . . . . . . . . . . . . 18 Figure 3. Mounting dimensions—top, side and end view . . . . . . . . . 20 Figure 4. I/O pins and supported ATA signals. . . . . . . . . . . . . . . . . . 22
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vi U4 Family Product Manual, Rev. D.
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U4 Family Product Manual, Rev. D 1 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 • 10-5 msec seek time, 5-400-RPM and 256-Kbyte buffer for excellent desktop performance • High instantaneous (burst) data-transfer rates (up to 66.6 Mbytes per second) using Ultra DMA mode 4 • 300 Gs nonoperating shock •
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2 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. ST32112A ST34311A ST36421A ST38421A Drive Specification Guaranteed Mbytes 6 (×10 bytes) 2,160 4,320 6,448 8,440 Guaranteed sectors 4,225,536 8,452,080 12,596,850 16,498,944 Bytes per sector 512 Default sectors per track 63 Default read/write heads 16 15 15 16 Default cy
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U4 Family Product Manual, Rev. D 3 ST32112A ST34311A ST36421A ST38421A Drive Specification 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) 8 sec Standby to ready (sec typical) 7 sec Startup current (typical): 1.5 amps 12V (peak) Seek power (typical) 7.0 watts Idle mode (typical) 3.1 watts Sta
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4 U4 Family Product Manual, Rev. D ST32112A ST34311A ST36421A ST38421A Drive Specification 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 13 errors 1 per 10 bits read Mean time between failures (power-on hours) 400,000 Contact start-stop cycles (25°C, 40% relative 50,000 humidity) Service life (years) 5
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U4 Family Product Manual, Rev. D 5 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. 1.1 Formatted capacity Drive Model Guaranteed Mbytes Guaranteed Bytes per 6 (1 Mbyte = 10 bytes) sectors sector ST38421A 8,440 16,498,944 512 ST36421A 6,448 12,596,850 512 ST
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6 U4 Family Product Manual, Rev. D 1.3 Recording and interface technology Interface ATA Recording method 16/17 EPRML Recording density BPI (bits/inch) 241,000 Track density TPI (tracks/inch) 13,100 2 Areal density (Mbits/inch max) 3,179 Spindle speed (RPM) (± 0.2%) 5,400 Internal data-transfer rate (Mbits/sec max) 206 I/O data-transfer rate 16.6 (PIO mode 4) (Mbytes /sec max) 66.6 (Ultra DMA mode 4) Interleave 1:1 Cache buffer (Kbytes) 256 1.4 Physical characteristics Drive Specification ST384
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U4 Family Product Manual, Rev. D 7 • 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. The full-stroke typical value is determined by averaging 100 full-stroke seeks in both directions. Typical seek times (msec) Read Write Track-to-track 2.0 2.75 Average 10.5
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8 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. This mode is not typical and is provided for worst-case information. • Read/Write power and current Read/write power is measured with the heads on track, ba
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U4 Family Product Manual, Rev. D 9 Typical Amps RMS Power Mode Typical Watts 5V 12V RMS Spinup — — 1.5 (peak) Seek (Random, no read/write) 7.0 0.39 0.42 Operating 5.7 0.34 0.33 Idle 3.1 0.24 0.16 Standby/Sleep 0.8 0.14 0.01 1.7.1.1 Typical current profile Figure 1 shows a typical current profile. Current (amps) 1.2 1.0 0.8 0.6 0.4 0.2 0 1234 5 6 78 Time (seconds) Figure 1. Typical startup and operation current profile
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10 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. • Using 12-volt power, the drive is expected to operate with a maximum of 120 mV peak-to-peak square-wave injected noise at up to 10 MHz. • Using 5-volt power the drive is expected to operate with a maximum of 100 mV peak-to-peak square-wave injected no
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U4 Family Product Manual, Rev. D 11 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. In Sleep mode, the drive buffer is disabled, the heads are parked and the spindle is at rest. The drive leaves Sleep mode after it receives a Hard Reset or Soft Reset from the host. After receiving a reset, t
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12 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. Shock may be applied in the X, Y or Z axis. 1.8.5.1 Operating shock These drives comply with the performance
