3Ware 7506-8 User Guide - Page 20

Background media scan and dynamic sector repair enhance data integrity - firmware

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Introduction internally in the 3ware firmware, and is not affected by changes to the system clock. Every 24 hours, the SMART RETURN STATUS is issued to attached disk drives. If none of the disk drives have detected a "threshold exceeded" condition, then nothing is logged to the 3DM Alarms page. If any of the disk drives have detected a "threshold exceeded" condition, then an AEN is logged to the 3DM Alarms page. This is repeated every 24 hours that the Escalade controller is powered up. ■ SMART READ LOG and SMART READ DATA - These commands are issued independent of the SMART RETURN STATUS command. These commands are only issued when the 'Download Error Log' button on the 3DM Alarms page is pressed (See page 155). The SMART data is returned at the bottom of the Error Log, starting after "#SMARTErrorLogStart." Staggered Spin Up allows drives to be powered-up into the Standby power management state to minimize inrush current at power-up and to allow the controller to sequence the spin-up of drives. The standby power management state is persistent after power-down and power-up. This feature is automatically utilized on drives that support this power management state. The disk drive must support staggered spin up and must be configured for spin up in order to take advantage of it. The Escalade supports the ATA/6 implementation of staggered spinup. 3DM Disk Management Utility runs in the background on the Escalade ATA RAID Controller's host and allows you to monitor the controller and maintain the ATA RAID arrays and drives locally or remotely via a standard web browser. To remotely access 3DM, you are not required to install any software on your system but you must have access to the network with the Escalade ATA RAID Controller. 3DM supports hot spare and hot swap for redundant arrays. Hot swap allows users to replace a failed drive in a redundant array while the system remains up. Refer to the 3DM Disk Management Utility chapter for more details and additional features. (3DM does not work under FreeBSD.) To create and delete arrays, you must use the 3ware Disk Array Configuration Utility. To check array configuration or status, disable write cache, select a hot spare or rebuild a mirrored array, you can use the 3ware Disk Array Configuration Utility at BIOS time or 3DM Disk Management Utility in real time. Hot swap is only available through the 3DM Disk Management Utility. Background media scan and dynamic sector repair enhance data integrity Background Media Scan checks for media errors on any disk drive connected to the 3ware controller. If the disk drive is part of a redundant array, error locations that are found and are deemed repairable are rewritten with the redundant data. This forces the drive firmware to reallocate the error sectors 12 3ware Escalade ATA RAID Controller User Guide

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Introduction
12
3ware Escalade ATA RAID Controller User Guide
internally in the 3ware firmware, and is not affected by changes to the
system clock. Every 24 hours, the SMART RETURN STATUS is issued
to attached disk drives. If none of the disk drives have detected a “thresh-
old exceeded” condition, then nothing is logged to the 3DM Alarms page.
If any of the disk drives have detected a “threshold exceeded” condition,
then an AEN is logged to the 3DM Alarms page. This is repeated every
24 hours that the Escalade controller is powered up.
■
SMART READ LOG and SMART READ DATA - These commands are
issued independent of the SMART RETURN STATUS command. These
commands are only issued when the 'Download Error Log' button on the
3DM Alarms page is pressed (See page 155). The SMART data is
returned at the bottom of the Error Log, starting after “#SMARTError-
LogStart.”
Staggered Spin Up
allows drives to be powered-up into the Standby power
management state to minimize inrush current at power-up and to allow the
controller to sequence the spin-up of drives. The standby power management
state is persistent after power-down and power-up. This feature is
automatically utilized on drives that support this power management state.
The disk drive must support staggered spin up and must be configured for
spin up in order to take advantage of it. The Escalade supports the ATA/6
implementation of staggered spinup.
3DM
Disk Management Utility
runs in the background on the Escalade ATA
RAID Controller’s host and allows you to monitor the controller and maintain
the ATA RAID arrays and drives locally or remotely via a standard web
browser. To remotely access 3DM, you are not required to install any software
on your system but you must have access to the network with the Escalade
ATA RAID Controller. 3DM supports hot spare and hot swap for redundant
arrays. Hot swap allows users to replace a failed drive in a redundant array
while the system remains up. Refer to the
3DM Disk Management Utility
chapter for more details and additional features. (3DM does not work under
FreeBSD.)
To create and delete arrays, you must use the
3ware Disk Array
Configuration Utility
. To check array configuration or status, disable write
cache, select a hot spare or rebuild a mirrored array, you can use the
3ware
Disk Array Configuration Utility
at BIOS time or
3DM Disk Management
Utility
in real time. Hot swap is only available through the
3DM Disk
Management Utility.
Background media scan and dynamic sector repair
enhance data integrity
Background Media Scan checks for media errors on any disk drive connected
to the 3ware controller. If the disk drive is part of a redundant array, error
locations that are found and are deemed repairable are rewritten with the
redundant data. This forces the drive firmware to reallocate the error sectors