NAME

     nvd — NVM Express disk driver

SYNOPSIS

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

           device nvme
           device nvd

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

           nvme_load="YES"
           nvd_load="YES"

DESCRIPTION

     The nvd driver exposes NVM Express (NVMe) namespaces as disks to the kernel disk storage
     API.  It depends on the nvme(4) driver for notification of existing NVMe namespaces and
     submission of NVM I/O commands.

     Device nodes from the nvd driver will have the format /dev/nvdX and are GEOM(4) disks which
     can be partitioned by geom(8).  Note that device nodes from the nvme(4) driver are not
     GEOM(4) disks and cannot be partitioned.

CONFIGURATION

     The nvd driver defines a system-wide maximum delete size for NVMe devices.  The default is
     1GB.  To select a different value, set the following tunable in loader.conf(5):

           hw.nvd.delete_max=<delete size in bytes>

SEE ALSO

     GEOM(4), nvme(4), geom(8), nvmecontrol(8), disk(9)

HISTORY

     The nvd driver first appeared in FreeBSD 9.2.

AUTHORS

     The nvd driver was developed by Intel and originally written by Jim Harris
     <jimharris@FreeBSD.org>, with contributions from Joe Golio at EMC.

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