User manual SEAGATE QUANTUM ATLAS II DATASHEET

[. . . ] QUA NTUM AT L A S I I 4. 5 /9. 1 S Key Features · S Highest-Performing Drives for Storage Subsystems, Servers, and Workstations Overview Quantum AtlasTM II 3. 5-inch, 7, 200 RPM hard disk drives are top-performing storage devices that meet the needs of high-end storage subsystems, video servers, and workstations. The drives offer high capacity and feature the most advanced technology for exceptional performance and higher areal density. [. . . ] Because Quantum Atlas II drives are used to store mission-critical data, they are extremely reliable. The drives have a reduced parts count, low power consumption, and high data integrity. 4. 55 GB and 9. 10 GB formatted capacities · 7, 200 RPM · 8 ms average seek time · Ultra SCSI-3 interface · MR heads · Tagged command queuing · ORCATM seek optimization algorithm Zero-latency read · Multi-block read/write data transfers · Automatic sector reallocation · Adaptive segmented buffer · Hot pluggable · Low command overhead · ID-less controller · Downloadable firmware · Robust multi-initiator support · Automatic power management · Advanced ECC on-the-fly · Write splice protection · Plug-and-Play SCSI · Advanced SCSI Architecture and Cache Performance Quantum's custom ASABETTM SCSI controller provides exceptionally low command overhead and reduced SCSI-bus execution times, as an unprecedented number of functions are automatically executed in hardware. The Quantum Atlas II family features a large cache and a unique cachemanagement algorithm that maximizes cache hits for multiple sequential read streams. The result is fast data access and high system throughput. The drives employ an advanced embedded quadrature servo system that continuously compensates for temperature changes, eliminating the need for thermal recalibrations that interrupt audio/video data streams. Exceptional Data Integrity and Reliability Quantum drives have the highest data integrity in the industry. Data from the SCSI bus to the media is protected with an Error-Detection Code (EDC). In addition, Quantum incorporates a powerful Reed Solomon Error-Correction Code (ECC) capable of correcting a single 73-bit error burst for each sector. *SCSI-3 SPI compliant. SPECIF IC ATIONS Quantum Atlas II Form Factor Interface 4. 5 9. 1 Physical Specifications Dimensions--inches (mm) Width Length Height Weight--pounds (kg) 4. 5 9. 1 Formatted Capacity (MB2) 3. 5 inch Ultra SCSI-31 single-ended Narrow 50-pin connector Wide 68-pin connector SCA-2 80-pin connector Fast SCSI differential Wide 68-pin connector 4, 550 9, 100 4. 0 (101. 6) 5. 75 (146. 05) 1. 0 (25. 4) 1. 2 (0. 55) 1. 63 (41. 4) 2. 0 (0. 9) Environmental Limits Operating Temperature (°C) Non-Condensing Humidity (%) Shock (G, 11 ms) Vibration (G, 22 to 375 Hz, peak-to-peak) Typical Audible Noise (dba @ 1 m, any direction, idle) Non-Operating Temperature (°C) Non-Condensing Humidity (%) 5 to 55 10 to 90 15 0. 5 34 -40 to 66 5 to 95 36 Disk Drive Configuration Disks Heads/Recording Surfaces Tracks per Surface Sectors per Track Bytes per Sector Track Density (tpi) Maximum Recording Density (bpi) Areal Density (Mb/sq. in. ) Encoding/Detection Method 5 10 5, 811 108 to 180 512 6, 000 109, 800 659 RLL (1, 7) 10 20 Performance Specifications Typical Seek Times3 (ms) Average (read) Track-to-Track Full Stroke Average Rotational Latency (ms) Rotational Speed (RPM) Internal Data Rate (Mb/sec) Data Transfer Rates (Buffer-to-Host) Ultra SCSI-3 (MB/sec) Narrow Wide Buffer Size (KB) 8 1. 0 <18 4. 17 7, 200 121 20 40 512 20 40 1, 024 Power Specifications Power Requirement +5V DC±5% Seeking (A, typ) +12V DC±5% Seeking (A, typ) Typical Power Draw (W) Idle (SCSI) Peak Current (mA on +12) 1 2 0. 6 0. 7 9. 0 1, 850 0. 6 1. 2 12. 0 2, 350 Reliability Specifications Preventive Maintenance Data Errors (per bits read) Recoverable Nonrecoverable Error-Correction Method Warranty4 (years) Not required <1 per 1011 <1 per 1015 Reed Solomon 5 SCSI-3 SPI compliant. Quantum defines a megabyte (MB) as 106 or 1, 000, 000 bytes. 3 Seek times are at nominal environmental conditions and include settling. 4 This warranty is standard when products are purchased directly through authorized Quantum distributors/dealers. Unless otherwise agreed, a one-year warranty is provided to all OEMs purchasing directly from Quantum. [. . . ] Capacity for the Extraordinary, Quantum Atlas, ASABET, and ORCA are trademarks of Quantum Corporation. Products mentioned herein are for identification purposes only and may be trademarks or registered trademarks of their respective companies. [. . . ]