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mount.8: mention that the snapshot option is exclusive

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When using the snapshot option, all other options are ignored. This
update reflects changes made in ab2dbd9b87.

Reviewed by:	0mp, mckusick
Differential Revision:	https://reviews.freebsd.org/D34584
This commit is contained in:
Robert Wing 2022-03-17 14:31:16 -08:00
parent c0b98fe16f
commit 8772a9117b
1 changed files with 5 additions and 3 deletions
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8
sbin/mount/mount.8
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@ -28,7 +28,7 @@
.\" @(#)mount.8 8.8 (Berkeley) 6/16/94
.\" $FreeBSD$
.\"
.Dd May 18, 2021
.Dd March 17, 2022
.Dt MOUNT 8
.Os
.Sh NAME
@ -276,11 +276,13 @@ The same as
.Fl r ;
mount the file system read-only (even the super-user may not write it).
.It Cm snapshot
This option allows a snapshot of the specified file system to be taken.
Take a snapshot of the specified filesystem.
When this option is used, all other options are ignored.
The
.Fl u
flag is required with this option.
Note that snapshot files must be created in the file system that is being
.Pp
Snapshot files must be created in the file system that is being
snapshotted.
You may create up to 20 snapshots per file system.
Active snapshots are recorded in the superblock, so they persist across unmount