HighPoint RocketRAID 2640X4 User Manual page 78

6 - Uninstalling
You can only uninstall the driver when your system is not booting from devices
attached to RR26xx controller. Just remove the line
rr26xx_load="YES"
in /boot/defaults/loader.conf, and then delete the driver module /modules/rr26xx.ko
or /boot/kernel/rr26xx.ko .
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