Seagate Momentus ST94811AB Product Manual
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Seagate Momentus ST94811AB Product Manual

Seagate Momentus ST94811AB Product Manual

Blade server drive
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Momentus Blade Server
ST94811AB

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Summary of Contents for Seagate Momentus ST94811AB

  • Page 1 Momentus Blade Server ST94811AB...
  • Page 3 Momentus Blade Server ST94811AB...
  • Page 4 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 of Seagate Technology LLC.
  • Page 5 Revision status summary sheet Revision Date Sheets Affected Rev. A 06/22/04 All.

  • Page 7: Table Of Contents

    Seagate Technology support services ........
  • Page 8 Momentus Blade Server Product Manual, Rev. A...
  • Page 9 Figure 1. Momentus disc drive ............1 Figure 2.
  • Page 10 viii Momentus Blade Server Product Manual, Rev. A...

  • Page 11: Introduction

    Introduction This manual describes the functional, mechanical and interface specifications for the Seagate Blade Server drive: • ST94811AB These drives provide the following key features: • 5,400-RPM spindle speed and 8 Mbytes combine for superior performance. • Quiet operation. Fluid Dynamic Bearing (FDB) motor.
  • Page 12 Momentus Blade Server Product Manual, Rev. A...

  • Page 13: 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 ST94811AB model drives. 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.
  • Page 14 **Typical notebooks will pull power to the drive when entering S3 and S4; while in the S3 and S4 states, drive sleep and drive standby modes will not contribute to battery power consumption. ST94811AB 22 (typical); 26 (max) 2.4 watts 2.4 watts...

  • Page 15: Formatted Capacity

    Formatted capacity Model Formatted capacity ST94811AB 40 Gbytes Default logical geometry Cylinders Read/write heads 16,383 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.

  • Page 16: Physical Characteristics

    Physical characteristics Height (mm) (inches) Width (mm) (inches) Length (mm) (inches) Typical weight (grams) (pounds) 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: •...

  • Page 17: Power Specifications

    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 7. Typical power measurements are based on an average of drives tested, under nominal conditions, using 5.0V input voltage at 25°C ambient temperature. •...

  • Page 18: Conducted Noise

    2.9.1.1 Typical current profile Amps 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 up to 10 MHz.

  • Page 19: Environmental Specifications

    2.10 Environmental specifications 2.10.1 Ambient temperature Ambient temperature is defined as the temperature of the environment immediately surrounding the drive. Actual drive case temperature should not exceed 40°C (104°F) within the operating ambient conditions. Above 1,000 feet (305 meters), the maximum temperature is derated linearly by 1°C every 1000 feet. Operating 5°...

  • Page 20: Shock

    2.10.5 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. 2.10.5.1 Operating shock These drives comply with the performance levels specified in this document when subjected to a maximum operating shock of 225 Gs based on half-sine shock pulses of 2 msec.

  • Page 21: Acoustics

    2.11 Acoustics Drive acoustics are measured as overall A-weighted acoustic sound power levels (no pure tones). All mea- surements are consistent with ISO document 7779. Sound power measurements are taken under essentially free-field conditions over a reflecting plane. For all tests, the drive is oriented with the cover facing upward. Note.

  • Page 22: Reliability

    Information Technology Equipment (ITE). Emission levels are defined by EN 55022, Class B and the immunity levels are defined by EN 55024. 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 comply with the directives when used in the test systems, we cannot guarantee that all systems will comply with the directives.

  • Page 23: Fcc Verification

    As a subassembly, no Federal Communications Commission verification or certification of the device is required. Seagate Technology LLC has tested this device in enclosures as described 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 Momentus Blade Server Product Manual, Rev. A...

  • Page 25: Configuring And Mounting The Drive

    Configuring and mounting the drive This section contains the specifications and instructions for configuring and mounting the drive. Handling and static discharge precautions After unpacking, and before installation, the drive may be exposed to potential handling and electrostatic dis- charge (ESD) hazards. Observe the following standard handling and static-discharge precautions: Caution: •...

  • Page 26: Cable-Select Option

    3.2.2 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 as shown in Figure 3. Refer to your computer manual to determine whether your computer supports this option.

  • Page 27: Ata Interface

    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 0–5. The drive also supports the use of the IORDY signal to provide reliable high-speed data transfers. For detailed information about the ATA interface, refer to the draft of AT Attachment with Packet Interface Extension (ATA/ATAPI-6), NCITS T13 1410D, subsequently referred to as the Draft ATA-6 Standard.

  • Page 28: Supported Ata Commands

    4.1.1 Supported ATA commands The following table lists ATA-standard commands that the drive supports. For a detailed description of the ATA commands, refer to the Draft ATA-6 Standard. See “S.M.A.R.T commands” on page 24 for details and subcom- mands used in the S.M.A.R.T. implementation. Table 6: Supported commands Command name...
  • Page 29 Table 6: Supported commands (Continued) Command name Security Unlock Seek Set Drive Parameters Set Features Set Max Address Note: Individual Set Max com- mands are identified by the value placed in the Set Max Features register as defined to the right. Set Multiple Mode Sleep S.M.A.R.T.

  • Page 30: Identify Device Command

    ) transfers information about the drive to the host following = none) Momentus Blade Server Product Manual, Rev. A Value 0C5A 16,383 0000 0000 0000 003F 0000 ASCII 0000 0400 0000 x.xx ST94811AB 8010 0000 2F00 0000 0200 0200 0007 xxxx...
  • Page 31 Hardware reset value (see description following this table) Auto acoustic management setting 95–127 ATA-reserved Security status 129– Seagate-reserved Momentus Blade Server Product Manual, Rev. A Value xxxx xxxx xxxx xxxx ST94811AB = 78,140,160 0000 xx07 0003 0078 0078 00F0 0078 0000 0000 0000 007E 0000...
  • Page 32 Word Description 160– ATA-reserved Integrity word Note. See the bit descriptions below for words 63, 88, 93 and 94 of the Identify Drive data: Description (if bit is set to 1) Word 63 Multiword DMA mode 0 is supported. Multiword DMA mode 1 is supported. Multiword DMA mode 2 is supported.

  • Page 33: Set Features Command

    4.1.3 Set Features command This command controls the implementation of various features that the drive supports. When the drive receives this command, it sets BSY, checks the contents of the Features register, clears BSY and generates an inter- rupt. If the value in the register does not represent a feature that the drive supports, the command is aborted. Power-on default has the read look-ahead and write caching features enabled.

  • Page 34: S.m.a.r.t. Commands

    SeaTools diagnostic software activates a built-in drive self-test (DST S.M.A.R.T. command for D4 nates unnecessary drive returns. The diagnostic software ships with all new drives and is also available at: http://seatools.seagate.com. This drive is shipped with S.M.A.R.T. features disabled. You must have a recent BIOS or software package that supports S.M.A.R.T.

  • Page 35: Seagate Technology Support Services

    +1-405-324-4770. Presales, Technical Support and Warranty Service Presales Support Our Presales Support staff can help you determine which Seagate products are best suited for your specific application or computer system. Technical Support If you need help installing your drive, consult your system’s documentation or contact the dealer’s support ser- vices department for assistance specific to your system.
  • Page 36 Seagate service center representative for warranty-related issues. Resellers or end users of drive products should contact their place of purchase or one of the Seagate warranty service cen- ters for assistance. Have your drive’s “ST” model number and serial number available.
  • Page 37 European Support Services For presales and technical support in Europe, dial the toll-free number for your specific location. If your location is not listed here, dial our presales and technical support call center at +1-405-324-4714 from 8:00 11:45 . and 1:00 .
  • Page 38 Asia/Pacific Support Services For Asia/Pacific presales and technical support, dial the toll-free number for your specific location. The Asia/ Pacific toll-free numbers are available from 6:00 ern time) Monday through Friday, except as noted. If your location is not listed here, direct dial one of our tech- nical support locations.
  • Page 39 Index Numerics 3D Defense System 1 acoustics 11 agency certification (regulatory) 12 altitude 9 ambient conditions 3 ambient temperature 6 areal density 1 ATA interface 17 ATA-standard commands 18 Australian C-Tick 13 autodetection 1 average seek time 6 BPI 5 buffer 5 burst 1 cable select 1...
  • Page 40 interface signals 17 interference 13 interleave 5 internal data-transfer rate OD 5 ISO document 7779 11 jumper settings 15 Korean RRL 13 LBA mode 5 length 6 Load/Unload 12 logical geometry 5 master/slave 1 Master/slave configuration 15 maximum temperature 9 Mean time between failures (MTBF) 12 modes 17 monitoring 1...
  • Page 41 shock 10 signals 17 single-track seeks 6 Sleep 7 sound 11 specifications 3 spindle speed 5 Spinup 7 spinup power 7 Standby 7 Standby Immediate 19 Standby mode 7 Standby to Ready 6 static-discharge precautions 15 subassembly 13 support services 25 surge immunity 11 technical support services 25 temperature 9...
  • Page 42 Momentus Blade Server Product Manual, Rev. A...
  • Page 44 Seagate Technology LLC 920 Disc Drive, Scotts Valley, California 95066-4544, USA Publication Number: 100339697, Rev. A, Printed in USA...

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