nullfs(5) [freebsd man page]

NULLFS(5)						      BSD File Formats Manual							 NULLFS(5)

NAME

     nullfs -- null file system

SYNOPSIS

     To enable support for this driver, place the following line in the kernel configuration file:

	   options NULLFS

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

	   nullfs_load="YES"

DESCRIPTION

     The nullfs driver will permit the FreeBSD kernel to mount a loopback file system sub-tree.

EXAMPLES

     To mount a nullfs file system:

	   mount_nullfs /usr/ports /home/devel/ports

SEE ALSO

     fstab(5), mount_nullfs(8)

HISTORY

     The nullfs layer first appeared in 4.4BSD.

AUTHORS

     The nullfs kernel implementation was written by John Heideman.

     This manual page was written by Daniel Gerzo <danger@FreeBSD.org>.

BSD
								 February 10, 2015							       BSD

ISCI(4) 						   BSD Kernel Interfaces Manual 						   ISCI(4)

NAME

     isci -- Intel C600 Serial Attached SCSI driver

SYNOPSIS

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

	   device scbus
	   device isci

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

	   isci_load="YES"

HARDWARE

     The isci driver provides support for Intel C600 SAS controllers.

CONFIGURATION

     To force legacy interrupts for all isci driver instances, set the following tunable value in loader.conf(5):

	   hw.isci.force_legacy_interrupts=1

DEBUGGING

     To enable debugging prints from the isci driver, set the

	   hw.isci.debug_level

     variable to a value between 1 and 4 in loader.conf(5).

     The hardware layer in the isci driver has extensive logging capabilities which are disabled by default for performance reasons.  These can be
     enabled by adding

	   options ISCI_LOGGING

     to the kernel configuration file.

SEE ALSO

     cd(4), ch(4), da(4), pci(4), sa(4), scsi(4)

HISTORY

     The isci driver first appeared in FreeBSD 8.3 and 9.1.

AUTHORS

     The isci driver was developed by Intel and originally written by Jim Harris <jimharris@FreeBSD.org> with contributions from Sohaib Ahsan and
     input from Scott Long <scottl@FreeBSD.org>.

     This man page was written by Jim Harris <jimharris@FreeBSD.org>.

BSD
								 January 23, 2012							       BSD