'\" t
.\"     Title: nvme-disconnect
.\"    Author: [FIXME: author] [see http://www.docbook.org/tdg5/en/html/author]
.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
.\"      Date: 10/30/2026
.\"    Manual: NVMe Manual
.\"    Source: NVMe
.\"  Language: English
.\"
.TH "NVME\-DISCONNECT" "1" "10/30/2026" "NVMe" "NVMe Manual"
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.SH "NAME"
nvme-disconnect \- Disconnect one or more Fabrics controller(s)\&.
.SH "SYNOPSIS"
.sp
.nf
\fInvme\fR [<global\-options>] \fIdisconnect\fR [\-\-device=<device> | \-d <device>]
                        [\-\-exclude | \-x]
                        [<fabrics\-options>]
.fi
.SH "DESCRIPTION"
.sp
Disconnects and removes one or more existing NVMe over Fabrics controllers\&. If the \-\-device option is specified, the controller with that name will be removed\&. If \-\-nqn is given by itself, every controller connected to the subsystem identified by subnqn will be removed\&. If \-\-nqn is combined with any of the other fabrics options below (the same ones \fInvme connect\fR accepts, such as \-\-transport, \-\-traddr, \-\-trsvcid, \-\-host\-traddr, \-\-host\-iface, \-\-hostnqn or \-\-hostid), only the controller(s) matching all of the specified options are removed \(em useful for disambiguating between multiple controllers connected to the same subsystem\&. \-\-device cannot be combined with \-\-nqn or any of the other fabrics options\&.
.sp
With \-\-exclude, a matching entry is written to the system\-wide NVMe\-oF exclusion list before the controller (or subsystem) is torn down, so that a cooperating orchestrator sees the exclusion in place before the removal event fires and does not immediately reconnect\&. See nvme\-exclusion\-add(1) and the exclusion list overview for details\&.
.SH "OPTIONS"
.PP
\-d <device>, \-\-device <device>
.RS 4
Indicates that the controller with the specified name should be removed\&. Cannot be combined with \-\-nqn or any of the fabrics options below\&.
.RE
.PP
\-x, \-\-exclude
.RS 4
Write a matching entry to the
\fIuser\fR
exclusion list before disconnecting, so orchestrators do not auto\-reconnect the controller\&. The entry is built from the controller\(cqs transport parameters (or, with a bare \-\-nqn, from the subsystem NQN)\&.
.RE
.SH "FABRICS OPTIONS"
.sp
The following options are common to NVMe over Fabrics commands such as nvme connect:
.PP
\-a <traddr>, \-\-traddr=<traddr>
.RS 4
Specify the network address of the controller\&. For transports using IP addressing (e\&.g\&. rdma, tcp), this should be an IP address\&.
.RE
.PP
\-\-concat
.RS 4
Enable secure concatenation (TCP)\&.
.RE
.PP
\-c <#>, \-\-reconnect\-delay=<#>
.RS 4
Set the delay in seconds before reconnect is attempted after a connection loss\&.
.RE
.PP
\-C <secret>, \-\-kxchap\-ctrl\-secret=<secret>
.RS 4
Controller authentication secret for bi\-directional authentication\&. If not specified, bi\-directional authentication is not attempted\&.
.RE
.PP
\-S <secret>, \-\-kxchap\-secret=<secret>
.RS 4
Host authentication secret (KX\-HMAC\-CHAP)\&. Must be provided in ASCII format as defined in the NVMe specification\&.
.RE
.PP
\-C <secret>, \-\-dhchap\-ctrl\-secret=<secret>
.RS 4
Controller authentication secret for bi\-directional authentication\&. If not specified, bi\-directional authentication is not attempted\&. (deprecated, see \-\-kxchap\-ctrl\-secret)
.RE
.PP
\-S <secret>, \-\-dhchap\-secret=<secret>
.RS 4
Host authentication secret (DH\-HMAC\-CHAP)\&. Must be provided in ASCII format as defined in the NVMe specification\&. (deprecated, see \-\-kxchap\-secret)
.RE
.PP
\-\-disable\-sqflow
.RS 4
Disable submission queue flow control\&.
.RE
.PP
\-G, \-\-data\-digest
.RS 4
Enable data digest generation/verification (TCP)\&.
.RE
.PP
\-D, \-\-duplicate\-connect
.RS 4
Allow duplicate connections to the same subsystem\&.
.RE
.PP
\-g, \-\-hdr\-digest
.RS 4
Enable header digest generation/verification (TCP)\&.
.RE
.PP
\-f <iface>, \-\-host\-iface=<iface>
.RS 4
Specify the network interface to use for the connection\&.
.RE
.PP
\-I <hostid>, \-\-hostid=<hostid>
.RS 4
Specify the host UUID\&.
.RE
.PP
\-q <hostnqn>, \-\-hostnqn=<hostnqn>
.RS 4
Override the default host NQN\&.
.RE
.PP
\-w <traddr>, \-\-host\-traddr=<traddr>
.RS 4
Specify the source address on the host side of the connection\&.
.RE
.PP
\-k <#>, \-\-keep\-alive\-tmo=<#>
.RS 4
Set the keep\-alive timeout in seconds\&.
.RE
.PP
\-\-keyring=<keyring>
.RS 4
Keyring to use for TLS key lookup\&.
.RE
.PP
\-n <subnqn>, \-\-nqn=<subnqn>
.RS 4
Specify the NVMe subsystem NQN to connect to\&.
.RE
.PP
\-i <#>, \-\-nr\-io\-queues=<#>
.RS 4
Number of I/O queues to create\&.
.RE
.PP
\-P <#>, \-\-nr\-poll\-queues=<#>
.RS 4
Number of polling queues to create\&.
.RE
.PP
\-W <#>, \-\-nr\-write\-queues=<#>
.RS 4
Number of write queues to create\&.
.RE
.PP
\-Q <#>, \-\-queue\-size=<#>
.RS 4
Queue depth for I/O queues\&.
.RE
.PP
\-l <#>, \-\-ctrl\-loss\-tmo=<#>
.RS 4
Maximum time in seconds to retry reconnect attempts after controller loss\&.
.RE
.PP
\-s <trsvcid>, \-\-trsvcid=<trsvcid>
.RS 4
Transport service identifier (e\&.g\&. TCP/rdma port)\&. Default is 4420 for RDMA\&.
.RE
.PP
\-T <#>, \-\-tos=<#>
.RS 4
Type of service value for the connection (TCP)\&.
.RE
.PP
\-t <trtype>, \-\-transport=<trtype>
.RS 4
Specify the transport type\&. Supported values include:
.RE
.sp
+
.TS
allbox tab(:);
lt lt
lt lt
lt lt
lt lt
lt lt.
T{
.sp
Value
T}:T{
.sp
Description
T}
T{
.sp
rdma
T}:T{
.sp
RDMA (RoCE, iWARP, InfiniBand)
T}
T{
.sp
tcp
T}:T{
.sp
TCP/IP
T}
T{
.sp
fc
T}:T{
.sp
Fibre Channel (\fBexperimental\fR)
T}
T{
.sp
loop
T}:T{
.sp
Local loopback transport
T}
.TE
.sp 1
.PP
\-\-tls
.RS 4
Enable TLS encryption (TCP)\&.
.RE
.PP
\-\-tls\-key=<tls\-key>
.RS 4
TLS key for the connection\&. It is recommended to preload keys into the system keyring instead of passing them via the command line\&.
.RE
.PP
\-\-tls\-key\-identity=<identity>
.RS 4
Identity associated with the TLS key\&.
.RE
.SH "GLOBAL OPTIONS"
.sp
The following options are defined at the top\-level nvme command and are available to this subcommand:
.PP
\-\-dry\-run
.RS 4
Print the command that would be executed, but do not actually execute it\&.
.RE
.PP
\-\-no\-ioctl\-probing
.RS 4
Disable probing for 64\-bit IOCTL support\&.
.RE
.PP
\-\-no\-retries
.RS 4
Disable retry logic on transient errors\&.
.RE
.PP
\-o <fmt>, \-\-output\-format=<fmt>
.RS 4
Set the reporting format to
\fInormal\fR,
\fItabular, \*(Aqjson\fR, or
\fIbinary\fR\&. Only one output format may be used at a time\&.
.RE
.PP
\-\-output\-format\-version=<version>
.RS 4
Select the output format version\&. Version
\fI1\fR
uses the original field naming, while version
\fI2\fR
(default) provides more consistent and script\-friendly field names\&. Other versions are rejected\&.
.RE
.PP
\-\-quiet
.RS 4
Suppress informational messages\&. Errors are still reported, and \-\-quiet cancels any \-\-verbose for the library log level\&.
.RE
.PP
\-\-set\-options=<key=value>[,<key=value>\&...]
.RS 4
Set libnvme library options for this invocation\&. Supported keys are
\fIforce\-4k\fR,
\fImi\-probe\-enabled\fR,
\fItest\-base\-dir\fR
and
\fItest\-sysfs\-dir\fR\&.
.RE
.PP
\-\-timeout=<ms>
.RS 4
Set the timeout for the command in milliseconds\&.
\fIinfinite\fR
or
\fI\-1\fR
waits without a time limit (0xffffffff)\&.
.RE
.PP
\-v, \-\-verbose
.RS 4
Increase the level of detail in the output\&. May be specified multiple times to further increase verbosity\&.
.RE
.sp
These options can also be set as machine\-wide defaults in nvme\-cli\&.conf(5)\&. A command\-line flag always overrides the file\&.
.SH "EXAMPLES"
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Disconnect all controllers for a subsystem named nqn\&.2014\-08\&.com\&.example:nvme:nvm\-subsystem\-sn\-d78432:
.sp
.if n \{\
.RS 4
.\}
.nf
# nvme disconnect \-\-nqn=nqn\&.2014\-08\&.com\&.example:nvme:nvm\-subsystem\-sn\-d78432
.fi
.if n \{\
.RE
.\}
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Disconnect the controller nvme4
.sp
.if n \{\
.RS 4
.\}
.nf
# nvme disconnect \-\-device=nvme4
.fi
.if n \{\
.RE
.\}
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Disconnect only the tcp controller for a subsystem at a given traddr, leaving other controllers of the same subsystem (e\&.g\&. over a different transport address) connected:
.sp
.if n \{\
.RS 4
.\}
.nf
# nvme disconnect \-\-nqn=nqn\&.2014\-08\&.com\&.example:nvme:nvm\-subsystem\-sn\-d78432 \e
                   \-\-transport=tcp \-\-traddr=192\&.168\&.1\&.100
.fi
.if n \{\
.RE
.\}
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Disconnect nvme4 and exclude it so orchestrators do not reconnect it:
.sp
.if n \{\
.RS 4
.\}
.nf
# nvme disconnect \-\-device=nvme4 \-\-exclude
.fi
.if n \{\
.RE
.\}
.RE
.SH "SEE ALSO"
.sp
nvme\-connect(1) nvme\-exclusion\-add(1)
.SH "NVME"
.sp
Part of the nvme\-user suite