Compaq AP200 Reference Guide - Page 42

SMART III Hard Drive Fault Prediction, Ultra ATA Integrity Monitoring

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3-5 SMART III Hard Drive Fault Prediction SMART III is an extension of SMART II capability. A SMART III hard drive is able not only to monitor and report on its own health, but to fix problems before they become failures that result in data losses. The SMART III drive periodically executes read scans of the entire disk. These read scans take place during periods of inactivity. During the scan, the disk drive will determine the "health" of each data sector and move data from any questionable areas of the disk to known good areas of the disk. To determine the "health" of the data during the scan, the drive uses sophisticated methods of Cyclic Redundancy Codes (CRC) and Error Checking and Correcting (ECC) codes to flag potentially bad areas of the disk. With today's multi-gigabyte hard drives, there are areas of the disk that are not read or written by applications for long periods of time. The SMART III technology will patrol the entire disk so that when unused or infrequently used parts of the disk are called upon, the data will be available. Ultra ATA Integrity Monitoring Ultra ATA Integrity Monitoring monitors the integrity of data as it is transferred between an Ultra ATA hard drive and the system's core logic. If the workstation detects an abnormal number of transmission errors, the screen displays a Local Alert message with recommended actions. If the workstation is on a network, an alert is also sent over the network to the system administrator. ECC Fault Prediction and Pre-Failure Warranty When the workstation encounters an excessive number of error checking and correcting (ECC) memory errors, the screen displays a Local Alert message. This message contains detailed information about the errant memory module, allowing you to take action before you experience non-correctable memory errors. The Pre-Failure Warranty for ECC memory modules allows you to replace these modules, free of charge, before the modules actually fail. Compaq Professional Workstation AP200 Reference Guide

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3-5
Compaq Professional Workstation AP200 Reference Guide
SMART III Hard Drive Fault Prediction
SMART III is an extension of SMART II capability. A SMART III hard drive
is able not only to monitor and report on its own health, but to fix problems
before they become failures that result in data losses. The SMART III drive
periodically executes read scans of the entire disk. These read scans take place
during periods of inactivity. During the scan, the disk drive will determine the
“health” of each data sector and move data from any questionable areas of the
disk to known good areas of the disk. To determine the “health” of the data
during the scan, the drive uses sophisticated methods of Cyclic Redundancy
Codes (CRC) and Error Checking and Correcting (ECC) codes to flag
potentially bad areas of the disk. With today’s multi-gigabyte hard drives,
there are areas of the disk that are not read or written by applications for long
periods of time. The SMART III technology will patrol the entire disk so that
when unused or infrequently used parts of the disk are called upon, the data
will be available.
Ultra ATA Integrity Monitoring
Ultra ATA Integrity Monitoring monitors the integrity of data as it is
transferred between an Ultra ATA hard drive and the system’s core logic. If
the workstation detects an abnormal number of transmission errors, the screen
displays a Local Alert message with recommended actions. If the workstation
is on a network, an alert is also sent over the network to the system
administrator.
ECC Fault Prediction and Pre-Failure
Warranty
When the workstation encounters an excessive number of error checking and
correcting (ECC) memory errors, the screen displays a Local Alert message.
This message contains detailed information about the errant memory module,
allowing you to take action before you experience non-correctable memory
errors. The Pre-Failure Warranty for ECC memory modules allows you to
replace these modules, free of charge, before the modules actually fail.