snapshot fails with "Filesize limit exceeded"

David King dking at
Thu Mar 22 03:07:26 UTC 2007

When trying to create a snapshot (per the handbook at <http://>),  
the creation of the snapshot fails:

/mnt/big# mount -u -o snapshot /mnt/big/.snap/"`date`" /mnt/big
mount: /mnt/big: Filesize limit exceeded

It takes about a minute to fail. This is a 300GB drive:

/mnt/big/.snap# df -h /mnt/big
Filesystem            Size    Used   Avail Capacity  Mounted on
/dev/mirror/gm0s1a    269G    134G    113G    54%    /mnt/big

Am I doing something wrong?

/mnt/big/.snap# tunefs -p /mnt/big
tunefs: ACLs: (-a)                                         disabled
tunefs: MAC multilabel: (-l)                               disabled
tunefs: soft updates: (-n)                                 disabled
tunefs: maximum blocks per file in a cylinder group: (-e)  2048
tunefs: average file size: (-f)                            16384
tunefs: average number of files in a directory: (-s)       64
tunefs: minimum percentage of free space: (-m)             8%
tunefs: optimization preference: (-o)                      time
tunefs: volume label: (-L)

/mnt/big/.snap# uname -a
FreeBSD <> 6.2-RELEASE-p2 FreeBSD 6.2-RELEASE-p2 #13: Sun Mar  4  
17:28:48 PST 2007     root@<>:/usr/obj/usr/src/sys/KERNEL  i386

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