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nvd(4)

NVD(4)                   BSD Kernel Interfaces Manual                   NVD(4)

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 ker‐
     nel 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 parti‐
     tioned.

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 fol‐
     lowing 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>.

BSD                            January 28, 2016                            BSD
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