GMOUNTVER(8)            FreeBSD 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 underlying
     provider.  When the underlying provider disappears - for example because
     the disk device got disconnected - it queues all the I/O requests 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
              operation succeeds, a new GEOM provider will be created using
              the given provider's name with a `.mountver' suffix.  The kernel
              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 reattach
             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 15.1-STABLE-HBSD         May 18, 2015                     GMOUNTVER(8)