Introductionwww.3ware.com 25Configure and manage your disk arraysThe 3ware Disk Array Configuration Utility is a BIOS level toolfor creating, deleting, maintaining disk arrays and rebuilding mir-rored arrays. From the 3DM Disk Array Configuration Utility,you can also specify hot spares from available drives to be dynami-cally substituted for a failed drive in a mirrored array. Refer to the3ware Disk Array Configuration Utility chapter.SMART Monitoring (Self-Monitoring, Analysis and ReportingTechnology) adds monitoring and troubleshooting functionality byautomatically checking a disk drive's health and reporting potentialproblems. It allows you to take proactive steps to prevent impend-ing disk crashes. SMART data is checked on all disk drives (arraymembers, JBOD and Hot Spares). Three SMART commands areissued: SMART RETURN STATUS (B0h with a Feature registervalue of DAh), SMART READ LOG (B0h with the content of theFeatures register equal to D5h), and SMART READ DATA (B0hwith the content of the Features register equal to D0h).• SMART RETURN STATUS - This command is issued 24 hoursafter the Escalade controller is powered up. This 24 hour waitperiod is timed internally in the 3ware firmware, and is notaffected by changes to the system clock. Every 24 hours, theSMART RETURN STATUS is issued to attached disk drives. Ifnone of the disk drives have detected a “threshold exceeded”condition, then nothing is logged to the 3DM Alarms page. Ifany of the disk drives have detected a “threshold exceeded” con-dition, then an AEN is logged to the 3DM Alarms page. This isrepeated every 24 hours that the Escalade controller is poweredup.• SMART READ LOG and SMART READ DATA - These com-mands are issued independent of the SMART RETURN STA-TUS command. These commands are only issued when the'Download Error Log' button on the 3DM Alarms page ispressed (See page 155). The SMART data is returned at the bot-tom of the Error Log, starting after “#SMARTErrorLogStart.”
