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 otherwise 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>

Debian                                          December 20, 2017                                         NDA(4)