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nullfs(5) [freebsd man page]

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

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 <>. BSD
February 10, 2015 BSD

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

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 <> with contributions from Sohaib Ahsan and input from Scott Long <>. This man page was written by Jim Harris <>. BSD
January 23, 2012 BSD
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