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MKSNAP_FFS(8) FreeBSD System Manager's Manual MKSNAP_FFS(8) NAME mksnap_ffs -- take a file system snapshot SYNOPSIS mksnap_ffs snapshot_name DESCRIPTION The mksnap_ffs utility creates a snapshot named snapshot_name. The group ownership of the file is set to "operator"; the owner of the file remains "root". The mode of the snapshot is set to be readable by the owner or members of the "operator" group. EXAMPLES Create a snapshot of /usr/home file system and mount the snapshot else- where: mksnap_ffs /usr/home/snapshot mdconfig -a -t vnode -o readonly -f /usr/home/snapshot mount -o ro /dev/md0 /mnt/ SEE ALSO chmod(2), chown(8), mdconfig(8), mount(8) HISTORY The mksnap_ffs utility first appeared in FreeBSD 5.1. CAVEATS The disk full situation is not handled gracefully and may lead to a sys- tem panic when no free blocks are found. Every filesystem can have only up to 20 active snapshots. When this limit is reached, attempting to create more snapshots fails with ENOSPC, and mksnap_ffs reports that it is "out of space". FreeBSD 13.0 October 3, 2016 FreeBSD 13.0
NAME | SYNOPSIS | DESCRIPTION | EXAMPLES | SEE ALSO | HISTORY | CAVEATS
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