[Solira] tune2fs

[substa]

On Nov 18, 2007 12:40 PM, Loris Fichera <loris.fichera a gmail.com> wrote:

> e l'opzione "-O" non è contemplata! Neanche una superficiale ricerca su
> internet è servita a schiarirmi le idee. Qualcuno sa a cosa serve?

mmm... dal mio man tune2fs:

       -O [^]feature[,...]
              Set or clear the indicated filesystem features (options)
in the filesystem.  More than  one  filesystem
              feature  can be cleared or set by separating features
with commas.  Filesystem features prefixed with a
              caret character ('^') will be cleared in the
filesystem's superblock;  filesystem  features  without  a
              prefix character or prefixed with a plus character ('+')
will be added to the filesystem.

              The following filesystem features can be set or cleared
using tune2fs:

                   dir_index
                          Use hashed b-trees to speed up lookups in
large directories.

                   filetype
                          Store file type information in directory entries.

                   has_journal
                          Use  a journal to ensure filesystem
consistency even across unclean shutdowns.  Setting the
                          filesystem feature is equivalent to using
the -j option.

                   sparse_super
                          Limit the number of backup superblocks to
save space on large filesystems.

              After setting or clearing sparse_super and filetype
filesystem features, e2fsck(8) must be run  on  the
              filesystem  to  return  the  filesystem to a consistent
state.  Tune2fs will print a message requesting
              that the system administrator run e2fsck(8) if
necessary.  After setting the dir_index feature,  e2fsck
              -D can be run to convert existing directories to the
hashed B-tree format.

              Warning:  Linux  kernels  before 2.0.39 and many 2.1
series kernels do not support the filesystems that
              use any of these features.  Enabling certain filesystem
features may prevent the filesystem from  being
              mounted by kernels which do not support those features.


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