High-Capacity Disk Drives for

Value-Oriented Personal Computers

QUANTUM BIGFOOT

1.2AT / 2.1AT / 2.5AT

Key Features

High capacity (more than

1,280 MB per disk)

5.25-inch, ultra slim-line

(0.75-inch-high) form factor

Fast ATA-2 PIO Mode 4 and

Multiword DMA Mode 2

support

AutoTransfer technology

Multiple AutoRead/Multiple

AutoWrite

160-bit Reed Solomon

Overview

Quantum Bigfoot5.25-inch hard disk drives, designed for value-oriented per- sonal computer systems, combine very high capacity with excellent cost-per- megabyte economics. Offered in format- ted capacities of 1,286, 2,110, and 2,577 megabytes (MB) of storage, these products are particularly well-suited to multimedia systems and applications that require large storage capacities.

The Quantum Bigfoot drives’ ultra slim-line design, which measures 8 by

5.75by 0.75 inches, fits into any avail- able 5.25-inch bay in most modular PCs without any customization to system enclosures. Since Quantum Bigfoot drives mount exactly like a CD-ROM unit, installation is actually easier than a traditional 3.5-inch drive, since no brackets or mounting rails are required.

These products are engineered specifi- cally to balance maximum storage capa- city, consumer multimedia performance requirements, and attractive cost-per-MB economics. By applying field-proven components to the 5.25-inch form factor, Quantum also provides the highest levels of quality and reliability.

High-Performance Data Transfers

Quantum Bigfoot drives provide high- speed data transfers through a well- designed, Fast ATA-2 interface. The combination of a 128-kilobyte buffer and the increased track capacities available with 5.25-inch disks allow these drives to meet the performance requirements of the newest generation of consumer PC systems. These features also result in improved sequential performance at the application level because, for any single

transaction, there are fewer seeks and head switches. This speed particularly enhances multimedia playback and virtual memory use of the disk drive.

Quantum’s implementation of a Fast ATA-2 interface supports local-bus AT Programmed Input/Output (PIO) Mode 4 and Multiword DMA Mode 2 data trans- fers at speeds of up to 16.6 MB per second. Enhanced Quantum AutoTransfertechnology takes advantage of the intel- ligent processing features of the drives and uses a proprietary ASIC design to speed data transfers by minimizing drive- to-host overhead delays.

Multiple AutoReadand Multiple AutoWrite—industry-first solutions for increasing sequential data transfers—allow multiple-sector transfers for a given data request. This combination of firmware and hardware also enhances AutoTransfer capabilities.

Reliability and Versatility

Quantum Bigfoot drives meet the highest standards for data integrity. Automatic, double-burst, on-the-fly error detection and correction are implemented using an advanced custom ASIC and firmware.

These drives also come with an AT- Bus Cable Selectfeature that supports the latest Plug-and-Play ATA specifica- tions. When combined with host system support,* this simplifies disk drive instal- lation by automatically configuring the drive and eliminating the need for manual jumper settings. This feature is particularly beneficial for users who are upgrading their system through the addition of a second hard disk drive.

*Host system support is defined as Quantum’s Disk Manager Software (supplied with drive).

double-burst ECC on-the-fly

Adaptive Segmented Buffer

DisCache® and WriteCache®

firmware

Advanced Embedded Servo

S.M.A.R.T. (Self-Monitoring,

Analysis, and Reporting

Technology) Revision 2

Support

AT-Bus Cable Select

System-Controlled Power

Modes

Defect Free Interface®

firmware

DiskWaredownloadable

firmware

300,000-hour MTBF

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Quantum 2.5AT, 2.1AT, 1.2AT specifications Overview, High-Performance Data Transfers, Reliability and Versatility

1.2AT, 2.1AT, 2.5AT specifications

The Quantum 2.5AT, 2.1AT, and 1.2AT represent a series of advanced powertrains designed to enhance performance and fuel efficiency across various automotive applications. Each variant offers distinct features, technologies, and characteristics tailored to meet the evolving demands of drivers and the automotive industry.

The Quantum 2.5AT stands out with its larger displacement engine, delivering robust power and exceptional torque characteristics. This model leverages advanced variable valve timing technology, which optimizes engine performance across different RPM ranges. Additionally, the 2.5AT incorporates a sophisticated multi-point fuel injection system that ensures precise fuel delivery, enhancing combustion efficiency and reducing emissions. Its dual-overhead cam (DOHC) design contributes to improved airflow, resulting in better overall engine performance. The 2.5AT also integrates an automatic transmission with adaptive learning capabilities, allowing the vehicle to adjust shifting patterns based on driving habits, further refining the driving experience.

In contrast, the Quantum 2.1AT offers a balanced blend of power and efficiency. This model is engineered to deliver commendable performance while prioritizing fuel economy. With a slightly smaller displacement, the 2.1AT utilizes turbocharging technology to maximize output without compromising efficiency. The intelligent turbocharger enhances torque at lower RPMs, providing responsive acceleration in city driving conditions. Additionally, the 2.1AT features a continuously variable transmission (CVT), which optimizes engine performance by allowing seamless transitions between gear ratios, resulting in smoother driving experiences and improved fuel consumption rates.

Lastly, the Quantum 1.2AT represents a compact and efficient option for urban drivers. This model is designed with a focus on lightweight construction and aerodynamics, making it an ideal choice for city dwellers seeking economical transportation. The 1.2AT is equipped with a direct injection engine that enhances fuel atomization and combustion, leading to lower fuel consumption and reduced emissions. Furthermore, the 1.2AT incorporates regenerative braking technology, capturing energy typically lost during braking and utilizing it to recharge the vehicle's electrical system, thus further improving efficiency.

In summary, the Quantum 2.5AT, 2.1AT, and 1.2AT each bring unique features, technologies, and characteristics to the table. Whether prioritizing power, balancing performance with efficiency, or focusing on compact urban mobility, these powertrain options demonstrate the advancements in automotive engineering aimed at enhancing the driving experience while addressing environmental concerns.