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Momentus 42
ST94019A
ST93015A
ST92014A
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Momentus 42 ST94019A ST93015A ST92014A
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© 2003, 2004 Seagate Technology LLC All rights reserved Publication number: 100316029, Rev. A May 2004 Seagate and Seagate Technology are registered trademarks of Seagate Technology LLC. SeaBOARD, SeaFONE, SeaTDD, SeaTools, and the Wave logo are either registered trade- marks or trademarks of Seagate Technology LLC. Other product names are registered trade- marks or trademarks of their owners. Seagate reserves the right to change, without notice, product offerings or specifications. No part
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Revision status summary sheet Revision Date Sheets Affected Rev. A 05/03/2004 All.
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Contents 1.0 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2.0 Drive specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2.1 Specification summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2.2 Formatted capacity . . . . . . . . . . . . . . . . . .
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vi Momentus 42 Product Manual, Rev. A
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List of Figures Figure 1. Momentus 42 disc drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Figure 2. Typical 5V startup and operation current profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Figure 3. Jumper settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Figure 4. Mounting dimensions—top, side and end view . . . .
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viii Momentus 42 Product Manual, Rev. A
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1.0 Introduction ® This manual describes the functional, mechanical and interface specifications for the following Seagate Momentus™ 42 drives: ST94019A ST92014A ST93015A These drives provide the following key features: 1 4,200-RPM-class performance spindle speed and 2-Mbyte buffer combine for superior performance. Quiet operation. Fluid Dynamic Bearing (FDB) motor. High instantaneous (burst) data transfer rates (up to 100 Mbytes per second) using Ultra DMA mode 5. Giant magnetores
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2 Momentus 42 Product Manual, Rev. A
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2.0 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 ST94019A, ST93015A, and ST92014A model drives. 2.1 Specification summary The specifications listed in this table are for quick reference. For details on specification measurement or defi- nition, see the appropriate section of this manual. Table 1: Specifications
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Table 1: Specifications (Continued) Drive specification ST94019A ST93015A ST92014A Average seek, write (msec typical) 14.0 Full-stroke seek (msec) 22 (typical); 26 (max) Seek power (typical) 2.4 watts Read/write power (typical) 2.4 watts Idle mode (typical) 1.2 watts Standby mode 0.36 watts (typical)** Sleep mode 0.36 watts (typical)** Voltage tolerance (including noise) 5V ± 5% Ambient temperature 5° to 55°C (operating) –40° to 65°C (nonoperating) Temperature gradient (°C per hour max) 20°C (o
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2.2 Formatted capacity Model Formatted capacity Guaranteed sectors Bytes per sector ST94019A 40 Gbytes 78,140,160 512 ST93015A 30 Gbytes 58,605,120 512 ST92014A 20 Gbytes 39,070,080 512 2.3 Default logical geometry Cylinders Read/write heads Sectors per track 16,383 16 63 LBA mode When addressing these drives in LBA mode, all blocks (sectors) are consecutively numbered from 0 to n–1, where n is the number of guaranteed sectors as defined above. 2.4 Physical organization Model Read/writ
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2.5 Recording and interface technology Technology Specification Interface Parallel ATA Recording method RLL 0,11 Recording density BPI (bits/inch max) 642,000 (ST94019A and ST92014A) 577,000 (ST93015A) Track density TPI (tracks/inch max) 100,780 2 Areal density (Mbits/inch max) 65 (ST94019A and ST92014A) 58 (ST93015A) Spindle speed (RPM) (± 0.2%) 4,200 class performance (spin speed actually 5,400 RPM) Internal data-transfer rate OD (Mbytes/sec max) 48.25 (ST94019A and ST92014A) 46.05 (ST93
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2.7 Seek time Seek measurements are taken with nominal power at 25°C ambient temperature. All times are measured using drive diagnostics. The specifications below are defined as follows: Track-to-track seek time is an average of all possible single-track seeks in both directions. Average seek time is a true statistical random average of at least 5,000 measurements of seeks between random tracks, less overhead. *Typical seek times (msec) Read Write Track-to-track 1.5 2.0 Average 12.0 14.0
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2.9 Power specifications The drive receives DC power (+5V) through the interface connector. 2.9.1 Power consumption Power requirements for the drives are listed in the table on page 8. Typical power measurements are based on an average of drives tested, under nominal conditions, using 5.0V input voltage at 25°C ambient temperature. • Spinup power Spinup power is measured from the time of power-on to the time that the drive spindle reaches operating speed. Seek mode During seek mode, the read/
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2.9.1.1 Typical current profile +5 Volt Current during spindle start — Typical Amperes 1.2 1.0 0.8 Amps 0.6 0.4 0.2 0.0 4.5 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 Seconds Figure 2. Typical 5V startup and operation current profile 2.9.2 Conducted noise Input noise ripple is measured at the host system power supply across an equivalent 15-ohm resistive load on the +5 volt line. Using 5-volt power, the drive is expected to operate with a maximum of 100 mV peak-to-peak square-wave injected noise at u
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2.9.4 Power-management modes The drive provides programmable power management to provide greater energy efficiency. In most systems, you can control power management through the system setup program. The drive features the following power-management modes: Table 3: Power management modes Power modes Heads Spindle Buffer Active (operating) Tracking Rotating Enabled Idle, performance Tracking Rotating Enabled Idle, active Floating Rotating Disabled Idle, low power Parked Rotating Disabled Standb
