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Chapter 7: Configuration Parameters
Drive-side Parameters
Disk Access Delay Time (Sec): Sets the delay time before the
subsystem tries to access the hard drives after power-on. Default is 15
seconds.
Drive Check Period (Sec): This is the time interval for the controller
to check all disk drives that were on the drive buses at controller
startup. The default value is “Disabled.” Disabled means that if a
drive is removed from the bus, the controller will not know it is
missing as long as no host accesses that drive. Changing the check
time to any other value allows the controller to check all array hard
drives at the selected time interval. If any drive is then removed, the
controller will be able to know – even if no host accesses that drive.
Auto-assign Global Spare Drive: Enable this function to allow the
system to auto-assign the Global Spare drive.
SMART: This allows you to configure SMART-related functionality.
SMART is short for “Self-Monitoring, Analysis and Reporting
Technology.” Options provided in the pull-down menu are the
actions to be taken if the SMART function detects an unstable drive.
Spindown Idle Delay Period (Sec): Subsystem firmware stops
supplying 12V power source to hard drives when hard drives have
not received I/Os for a period of time. When enabled, this feature
helps reduce power consumption.
Drive Delayed Write: This option applies to SATA disk drives which
may come with embedded buffers. When enabled, write performance
may improve. However, this option should be disabled for mission-
critical applications. In the event of power outage or drive failures,
data cached in drive buffers may be lost, and data inconsistency will
occur. The default setting is “Disabled.”
NOTE:
This function is only applicable on RAID subsystems running Firmware
3.47 or above version with SATA hard drives.
Disk I/O Timeout (Sec): This is the time interval for the subsystem to
wait for a drive to respond to I/O requests. Selectable intervals range
from 1 to 10 seconds.
SAF-TE/SES Device Check Period (Sec): If enclosure devices in
your RAID enclosure are being monitored via SAF-TE/SES, use this
Host-side, Drive-side, and Disk Array Parameters 7-15
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