mke2fs.conf
is the configuration file for
mke2fs(8).
It controls the default parameters used by
mke2fs(8)
when it is creating ext2 or ext3 filesystems.
The
mke2fs.conf
file uses an INI-style format. Stanzas, or top-level sections, are
delimited by square braces: [ ]. Within each section, each line
defines a relation, which assigns tags to values, or to a subsection,
which contains further relations or subsections.
An example of the INI-style format used by this configuration file
follows below:
[section1]
tag1 = value_a
tag1 = value_b
tag2 = value_c [section 2]
tag3 = {
subtag1 = subtag_value_a
subtag1 = subtag_value_b
subtag2 = subtag_value_c
}
tag1 = value_d
tag2 = value_e
}
Comments are delimited by a semicolon (';') or a hash ('#') character
at the beginning of the comment, and are terminated by the end of
line character.
Tags and values must be quoted using double quotes if they contain
spaces. Within a quoted string, the standard backslash interpretations
apply: "\n" (for the newline character),
"\t" (for the tab character), "\b" (for the backspace character),
and "\\" (for the backslash character).
The following stanzas are used in the
mke2fs.conf
file. They will be described in more detail in future sections of this
document.
[defaults]
Contains relations which define the default parameters
used by
mke2fs(8).
In general, these defaults may be overridden by a definition in the
fs_types
stanza, or by an command-line option provided by the user.
[fs_types]
Contains relations which define defaults that should be used for specific
filesystem types. The filesystem type can be specified explicitly using
the
-T
option to
mke2fs(8).
If no filesystem type is specified,
mke2fs(8)
will use the filesystem type
floppy
if the filesystem size is less than or equal to 3 megabytes.
If the filesystem size is greater than 3 but less than or equal to
512 megabytes,
mke2fs(8)
will use the filesystem
small.
Otherwise,
mke2fs(8)
will use the default filesystem type
default.
THE [defaults] STANZA
The following relations are defined in the
[defaults]
stanza.
base_features
This relation specifies the filesystems features which are enabled in
newly created filesystems. It may be overridden by the
base_features
relation found in the filesystem-type-specific subsection of
the
[fs_types]
stanza.
default_features
This relation specifies a set of features that should be added or
removed to the features listed in the
base_features
relation. It may be overridden by the filesystem-specific
default_features
in the filesystem-type subsection of
[fs_types],
and by the
-O
command-line option
to
mke2fs(8).
blocksize
This relation specifies the default blocksize if the user does not
specify a blocksize on the command line, and the filesystem-type
specific section of the configuration file does not specify a blocksize.
inode_ratio
This relation specifies the default inode ratio if the user does not
specify one on the command line, and the filesystem-type
specific section of the configuration file does not specify a default
inode ratio.
THE [fs_types] STANZA
Each tag in the
[fs_types]
stanza names a filesystem type which can be specified via the
-T
option to
mke2fs(8).
The value of the tag is a subsection where the relations in that
subsection define the defaults for that filesystem type. For
example:
[fs_types]
small = {
blocksize = 1024
inode_ratio = 4096
}
floppy = {
blocksize = 1024
}
For each filesystem type, the following tags may be used in that
fs_type's subsection:
base_features
This relation specifies the features which are enabled for this
filesystem type.
default_features
This relation specifies set of features which should be enabled or
disabled to the features listed in the
base_features
relation. It may be overridden by the
-O
command-line option to
mke2fs(8).
blocksize
This relation specifies the default blocksize if the user does not
specify a blocksize on the command line.
inode_ratio
This relation specifies the default inode ratio if the user does not
specify one on the command line.
