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Man Pages
GMOUNTVER(8) FreeBSD System Manager's Manual GMOUNTVER(8)

gmountver
control utility for disk mount verification GEOM class

gmountver create [-v] prov ...

gmountver destroy [-fv] name

gmountver list

gmountver status [-s name]

gmountver load [-v]

gmountver unload [-v]

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:

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 name.
See geom(8).
See geom(8).
See geom(8).
See geom(8).

Additional options:

Force the removal of the specified mountver device.
Be more verbose.

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 is 0 on success, and 1 if the command fails.

geom(4), geom(8)

The gmountver utility appeared in FreeBSD 9.0.

Edward Tomasz Napierala <trasz@FreeBSD.org>
May 18, 2015 FreeBSD 13.1-RELEASE

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