Users guide

Intel® RAID Software User Guide 126
Enter a number between 0 and 100 to control the rate at which virtual drives are
initialized in the background.
• CC Rate (Check Consistency Rate): A consistency check scans the consistency
of data on a fault-tolerant disk to determine if the data is corrupted. Enter a number
between 0 and 100 to control the rate at which a consistency check is done.
• Reconstruction Rate: Enter a number between 0 and 100 to control the rate at
which the reconstruction of a virtual drive occurs.
• Adapter BIOS: Determines whether the Option ROM is loaded.
• Coercion Mode:
— None: No coercion of size.
— 128M: The software rounds the drive capacity down to the next 128 MB
boundary
and then up to the nearest 10 MB until the coerced capacity is larger
than the actual drive size. It is then reduced by 10 MB.
— 1G: The software rounds the drive capacity down to the nearest 1 GB
bo
undary and then down by 1 MB. This corresponds to the terms most drive
manufacturers use.
• PDF Interval: The PDF interval is the predictive disk failure polling interval. This
is the time needed between disk polls to perform SMART polling.
• Alarm Control: Disable the alarm to turn off the on-board speaker alarm.
• Interrupt Throttle Count and Interrupt Throttle Time: Sets the interrupt throttle
and count times. This is the number of times that interrupts are coalesced and the
amount of time that firmware holds an interrupt before passing it to the host
software. Set values lower for better performance—be aware that latency is
impacted by these settings.
• Cache Flush Interval: This sets the cache flush interval. Valid settings are 2, 4, 6,
8, or 10 seconds.
• Spinup Drive Count: This setting controls the number of drives that spin up at one
time.
• Spinup Delay: After the RAID controller completes its initialization process, the
initial delay value defines the number of seconds before the first disk interrogation
request is issued to the array or disk group. Do not change this value.
• Stop On Error: Stops system POST if any error is detected.
• NCQ: Enables NCQ (Native Command Queuing) to optimize physical drive
performance and life.
• Stop CC On Error: Stops Consistency Check if any error is detected.
• Schedule CC: Schedules a Consistency Check.
• Maintain PD Fail History: Enables tracking of bad PDs across reboot.