Xavier Gnata posted on Sun, 26 May 2013 00:11:55 +0200 as excerpted: > Nowdays, external hard drives are mounted automagically by kde, gnome or > whatever else. > How is it suppose to work with external hard drives using btrfs with > compression? > If a btrfs filesystem lzo-compressed is mounted without the > |compress=|xxx option then all the newly created files are uncompressed, > aren't then? > Would it be possible to detect if a file system is compressed and to > mount it *automatically* and accordingly (except otherwise explicitly > stated by the user) with/without the lzo/gzip option? There's a proposal to do something like ext3/4's default options as set by tune2fs, at some point, presumably before btrfs loses the "unstable disk format" and under heavy development warnings. However, there's nothing like that yet, AFAIK, so most options must be set per-mount. There's a lot you can do with udev events, however, and strongly suspect either compression-detection, or match-against-a-list-and-compress (or don't compress if the default is compression otherwise) if the UUID/LABEL is listed. Alternatively, at least kde can be set not to automount specific UUIDs/ LABELs, and then there's always the traditional fstab option, and I think either fstab entered drives are ignored by the automount system or they're automounted with options from fstab (I have that kde subsystem entirely disabled here so it doesn't automount anything, so I'm not sure which it actually does). -- Duncan - List replies preferred. No HTML msgs. "Every nonfree program has a lord, a master -- and if you use the program, he is your master." Richard Stallman -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
