xfs_freeze suspends and resumes access to an XFS filesystem (see
xfs_freeze halts new access to the filesystem and creates a stable image on disk.
xfs_freeze is intended to be used with volume managers and hardware RAID devices
that support the creation of snapshots.
mount-point argument is the pathname of the directory where the filesystem
The filesystem must be mounted to be frozen (see
-f flag requests the specified XFS filesystem to be
frozen from new modifications.
When this is selected, all ongoing transactions in the filesystem
are allowed to complete, new write system calls are halted, other
calls which modify the filesystem are halted, and all dirty data,
metadata, and log information are written to disk.
Any process attempting to write to the frozen filesystem will block
waiting for the filesystem to be unfrozen.
Note that even after freezing, the on-disk filesystem can contain
information on files that are still in the process of unlinking.
These files will not be unlinked until the filesystem is unfrozen
or a clean mount of the snapshot is complete.
-u flag is used to un-freeze the filesystem and allow
operations to continue.
Any filesystem modifications that were blocked by the freeze are
unblocked and allowed to complete.
-u must be supplied to