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GMOUNTVER(8)		    System Manager's Manual		  GMOUNTVER(8)

NAME
       gmountver -- control utility for	disk mount verification	GEOM class

SYNOPSIS
       gmountver create	[-v] prov ...
       gmountver destroy [-fv] name
       gmountver list
       gmountver status	[-s name]
       gmountver load [-v]
       gmountver unload	[-v]

DESCRIPTION
       The  gmountver  utility	is used	to control the mount verification GEOM
       class.  When configured,	it passes all the I/O requests to the underly-
       ing provider.  When the underlying provider disappears  -  for  example
       because	the  disk  device got disconnected - it	queues all the I/O re-
       quests and waits	for the	provider to reappear.  When that  happens,  it
       attaches	to it and sends	the queued requests.

       The first argument to gmountver indicates an action to be performed:

       create	Enable	mount verification for the given provider.  If the op-
		eration	succeeds, a new	GEOM provider will  be	created	 using
		the given provider's name with a `.mountver' suffix.  The ker-
		nel module geom_mountver.ko will be loaded if it is not	loaded
		already.

       destroy	Destroy	name.

       list	See geom(8).

       status	See geom(8).

       load	See geom(8).

       unload	See geom(8).

       Additional options:

       -f      Force the removal of the	specified mountver device.

       -v      Be more verbose.

SYSCTL VARIABLES
       The  following  sysctl(8) variables can be used to control the behavior
       of the MOUNTVER GEOM class.  The	default	value is shown	next  to  each
       variable.

       kern.geom.mountver.debug: 0
	       Debug  level  of	the MOUNTVER GEOM class.  This can be set to a
	       number between 0	and 3 inclusive.  If set to  0	minimal	 debug
	       information  is	printed, and if	set to 3 the maximum amount of
	       debug information is printed.

       kern.geom.mountver.check_ident: 1
	       This can	be set to 0 or 1.  If set to 0,	gmountver  will	 reat-
	       tach  to	the device even	if the device reports a	different disk
	       ID.

EXIT STATUS
       Exit status is 0	on success, and	1 if the command fails.

SEE ALSO
       geom(4),	geom(8)

HISTORY
       The gmountver utility appeared in FreeBSD 9.0.

AUTHORS
       Edward Tomasz Napierala <trasz@FreeBSD.org>

FreeBSD	13.0			 May 18, 2015			  GMOUNTVER(8)

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