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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.
mksnap_ffs /usr/home/snapshot mdconfig -a -t vnode -o readonly -f /usr/home/snapshot mount -o ro /dev/md0 /mnt/
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".
MKSNAP_FFS (8) | October 3, 2016 |
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