Ubuntu Unleashed 2013 Edition: Covering 12.10 and 13.04, Eighth Edition

The tune2fs Command

With tune2fs, you can adjust the tunable file system parameters on an ext2 or ext3 file system. A few performance-related items of note are as follows:

• To disable file system checking, the -c 0 option sets the maximal mount count to zero.

• The interval between forced checks can be adjusted with the -i option.

• The -m option sets the reserved blocks percentage with a lower value, freeing more space at the expense of fsck having less space to write any recovered files.

• Decrease the number of superblocks to save space with the -O sparse_super option. (Modern file systems use this by default.) Always run e2fsck after you change this value.

• More space can be freed with the -r option that sets the number of reserved (for ...