mfi (4)

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Copyright (c) 2006 Scott Long
All rights reserved.

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(The comments found at the beginning of the groff file "man4/mfi.4freebsd".)

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.conf5:

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 ifconfig 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 ifconfig 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.

A tunable is provided to adjust the ifconfig driver's behaviour when attaching to a card. By default the driver will attach to all known cards with high probe priority. If the tunable hw.mfi.mrsas_enable is set to 1, then the driver will reduce its probe priority to allow mrsas to attach to the card instead of .

HARDWARE

The ifconfig driver supports the following hardware:

• LSI MegaRAID SAS 1078
• LSI MegaRAID SAS 8408E
• LSI MegaRAID SAS 8480E
• LSI MegaRAID SAS 9240
• LSI MegaRAID SAS 9260
• Dell PERC5
• Dell PERC6
• IBM ServeRAID M1015 SAS/SATA
• IBM ServeRAID M1115 SAS/SATA
• IBM ServeRAID M5015 SAS/SATA
• IBM ServeRAID M5110 SAS/SATA
• IBM ServeRAID-MR10i
• Intel RAID Controller SRCSAS18E
• Intel RAID Controller SROMBSAS18E

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

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

HISTORY

The ifconfig driver first appeared in Fx 6.1 .

AUTHORS

The ifconfig driver and this manual page were written by An Scott Long Aq scottl@FreeBSD.org .

BUGS

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