MFI(4) BSD Kernel Interfaces Manual MFI(4)
NAME
mfi — LSI MegaRAID SAS driver
SYNOPSIS
To compile this driver into the kernel, place the following lines in your kernel configuration file:
device pci
device mfi
Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):
mfi_load="YES"
DESCRIPTION
This driver is for LSI’s next generation PCI Express SAS RAID controllers. Access to RAID arrays (logical disks) from this driver is provided via /dev/mfid? device nodes. A simple management interface is also provided on a per-controller basis via the /dev/mfi? device node.
The mfi name is derived from the phrase "MegaRAID Firmware Interface", which is substantially different than the old "MegaRAID" interface and thus requires a new driver. Older SCSI and SATA MegaRAID cards are supported by amr(4) and will not work with this driver.
Two sysctls are provided to tune the mfi driver’s behavior when a request is made to remove a mounted volume. By default the driver will disallow any requests to remove a mounted volume. If the sysctl dev.mfi.%d.delete_busy_volumes is set to 1, then the driver will allow mounted volumes to be removed.
HARDWARE
The mfi driver supports the following hardware:
•
LSI MegaRAID SAS 8408E
•
LSI MegaRAID SAS 8480E
•
Dell PERC5/i
FILES
/dev/mfid?
array/logical disk interface
/dev/mfi?
management interface
DIAGNOSTICS
mfid%d: Unable to delete busy device An attempt was made to remove a mounted volume.
SEE ALSO
HISTORY
The mfi driver first appeared in FreeBSD 6.1.
AUTHORS
The mfi driver and this manual page were written by Scott Long 〈 scottl AT FreeBSD DOT org〉 .
BUGS
The driver does not support big-endian architectures at this time.
BSD April 3, 2006 BSD