Avago Technologies MegaRAID SAS 9240-4i - Manual (Page 44)

LSI Corporation
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MegaRAID SAS Device Driver Installation User Guide 
June 2014
FreeBSD Driver Installation
Updating Drivers in the FreeBSD System
5. To load the driver, perform the following steps, depending on which driver you use.
— For the mfi driver, type the following command, and press Enter.
# kldload -v /boot/kernel/mfi.ko
— For the mrsas driver, type the following command, and press Enter.
# kldload -v /boot/kernel/mrsas.ko
If storage is present, the system log records its presence (usually in/var/log/messages).
6. To have the driver load automatically every time the system reboots, add the following line to the

/boot/loader.conf file, depending on which driver you use.
— For the mfi driver, type the following line, and press Enter.
mfi_load="YES"
— For the mrsas driver, type the following line, and press Enter.
mrsas_load="YES"