Introduction: Quantum Atlas™ 10K III 18GB SCSI Hard Disk Drive User’
s Guide
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Overview
Quantum Atlas 10K III SCSI hard disk drives are part of a family of high performance 1-inch high hard disk drives manufactured to meet the highest
product quality standards. The innovative design of the Quantum Atlas 10K III enables Quantum to produce a family of low-cost, high reliability
SCSI hard disk drives. These hard disk drives use non-removable, 3.5-inch hard disks and are available with the following SCSI configurations:
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Ultra160, Ultra2, Ultra SCSI 68-pin Wide (16-bit).
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Ultra160, Ultra2, Ultra SCSI 80-pin SCA-2 (16-bit).
The Quantum Atlas 10K III SCSI hard disk drives feature an embedded SCSI drive controller that automates significant SCSI commands to
optimize system performance. The drive also manages media defects and error recovery internally, making these operations fully transparent to
the user.
General Features
The Quantum Atlas 10K III 18GB SCSI hard disk drives include the following key features:
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Formatted storage capacity of 18.2GB.
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Low profile, 1-inch height.
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Industry standard 3.5-inch form factor.
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Embedded SCSI controller.
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SCSI-2 and SCSI-3 support.
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SCSI bus active negation drivers.
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SCSI bus fairness.
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Automatic Power Management System with power saving sub-states.
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Embedded servo system for exceptional head positioning accuracy and long life.
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Quiet Drive Technology (QDT) for lower acoustic noise while seeking.
Performance
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Average seek time of less than 4.5ms for reads.
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10,000 RPM rotational speed.
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Average rotational latency of 3.0ms.
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8MB SDRAM buffer. Look-ahead DisCache feature with continuous prefetch and WriteCache write-buffering capabilities.
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Read-on-arrival firmware.
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Tagged command queuing with reordering (ORCA).
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ECC on-the-fly data correction.
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Highly automated SCSI protocol (including AutoRead and AutoWrite).
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1:1 interleave on read and write operations.
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High performance Ultra160 SCSI interface.
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Data transfer rates of up to 6.0MB/s asynchronous, 40MB/s Ultra SCSI, 80MB/s Ultra2 SCSI, and 160MB/s Ultra160 SCSI.
Reliability
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1,100,000 hours Mean Time Between Failure (MTBF).
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352-bit interleaved Reed-Solomon Error Correction Code (ECC), with cross checking correction of up to three separate bursts of 32 bits
each totalling up to 96 bits in length.
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SMART 2 (Self-Monitoring, Analysis and Reporting Technology).
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Self-Diagnostic firmware.
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Patented Airlock automatic shipping lock and dedicated landing zone.
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Transparent media defect mapping.
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Reassignment of defective sectors without reformatting.
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Shock sensor prevents the drive from writing data to disk when the drive is subjected to excessive external shock.
NOTE: The formatted capacity of your hard disk drive may seem smaller than what you ordered because the operating system reports
drive capacity assuming that 1 megabyte (MB) equals 1,048,576 (2
20
) bytes while drive manufacturers consider 1 MB to equal
1,000,000 (10
6
) bytes.
