mfi

To compile this driver into the kernel, place the following lines in your kernel configuration file:

Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):

mfi_load="YES"

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.

The mfi driver supports the following hardware:

• LSI MegaRAID SAS 1078
• LSI MegaRAID SAS 8408E
• LSI MegaRAID SAS 8480E
• LSI MegaRAID SAS 9260
• Dell PERC5
• Dell PERC6
• IBM ServeRAID M5015 SAS/SATA
• IBM ServeRAID-MR10i
• Intel RAID Controller SROMBSAS18E

/dev/mfid?

array/logical disk interface

/dev/mfi?

management interface

mfid%d: Unable to delete busy device

An attempt was made to remove a mounted volume.

amr(4), pci(4), mfiutil(8)

The mfi driver first appeared in FreeBSD 6.1.

The mfi driver and this manual page were written by Scott Long ⟨scottl@FreeBSD.org⟩.

The driver does not support big-endian architectures at this time.