m.seaman at infracaninophile.co.uk
Wed Jun 23 11:07:01 UTC 2010
-----BEGIN PGP SIGNED MESSAGE-----
On 23/06/2010 11:26:43, Aiza wrote:
> Is there an equivalent of the MAC sparseimage on FreeBSD?
A filesystem image that only takes up as much space as the total of all
the files within it?
Not exactly. There are many archiving formats -- dump, tar, cpio, etc.
etc. which fulfill the space usage criterion, but they aren't filesystem
images in the sense that you could mount them on your system.
Probably the closest thing is to create a .iso image using something
like growisofs(1m) (from the sysutils/dvd+rw-tools port), but while you
can mount a .iso as a file-backed metadevice you can't mount it read/write.
There is the Union FS type -- see mount_unionfs(8) -- where the overlay
layer just contains the changed files made since the filesystem was
mounted. Which is sort-of what you're asking about, but not quite the
Dr Matthew J Seaman MA, D.Phil. 7 Priory Courtyard
PGP: http://www.infracaninophile.co.uk/pgpkey Ramsgate
JID: matthew at infracaninophile.co.uk Kent, CT11 9PW
-----BEGIN PGP SIGNATURE-----
Version: GnuPG/MacGPG2 v2.0.14 (Darwin)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/
-----END PGP SIGNATURE-----
More information about the freebsd-questions