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NDA(4)		       FreeBSD Kernel Interfaces Manual			NDA(4)

NAME
     nda -- NVMe Direct	Access device driver

SYNOPSIS
     device nvme
     device scbus

DESCRIPTION
     The nda driver provides support for direct	access devices,	implementing
     the NVMe command protocol,	that are attached to the system	through	a host
     adapter supported by the CAM subsystem.

SYSCTL VARIABLES
     The following variables are available as both sysctl(8) variables and
     loader(8) tunables:

     kern.cam.nda.sort_io_queue

	 This variable determines whether the software queued entries are
	 sorted	in LBA order or	not.  Sorting is almost	always a waste of
	 time.	The default is to not sort.

     The following report per-device settings, and are read-only unless	other-
     wise indicated. Replace N with the	device unit number.

     kern.cam.nda.N.rotating

	 This variable reports whether the storage volume is spinning or
	 flash.	 It's value is hard coded to 0 indicating flash.

     kern.cam.nda.N.unmapped_io
	 This variable reports whether the nda driver accepts unmapped I/O for
	 this unit.

FILES
     /dev/nda*	NVMe storage device nodes

SEE ALSO
     nvme(4), nvd(4)

HISTORY
     The nda driver first appeared in FreeBSD 12.0.

AUTHORS
     Warner Losh <imp@FreeBSD.org>

FreeBSD	Ports 11.2	       December	20, 2017	    FreeBSD Ports 11.2

NAME | SYNOPSIS | DESCRIPTION | SYSCTL VARIABLES | FILES | SEE ALSO | HISTORY | AUTHORS

Want to link to this manual page? Use this URL:
<https://www.freebsd.org/cgi/man.cgi?query=nda&manpath=FreeBSD+12.0-RELEASE+and+Ports>

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