.BR e2fsck (8).
If
.I max-mount-counts
+is the string "random", tune2fs will use a random value between 20 and 40.
+If
+.I max-mount-counts
is 0 or \-1, the number of times the filesystem is mounted will be disregarded
by
.BR e2fsck (8)
when using journaled filesystems.
.sp
Mount-count-dependent checking is disabled by default to avoid
-unanticipated long reboots while e2fsck does its work. However,
-you may wish to consider the consequences of disabling
-mount-count-dependent checking entirely. Bad disk drives, cables,
-memory, and kernel bugs could all corrupt a filesystem without
-marking the filesystem dirty or in error. If you are using
-journaling on your filesystem, your filesystem will
-.B never
-be marked dirty, so it will not normally be checked. A
-filesystem error detected by the kernel will still force
-an fsck on the next reboot, but it may already be too late
-to prevent data loss at that point.
-.sp
-See also the
-.B \-i
-option for time-dependent checking.
+unanticipated long reboots while e2fsck does its work. If you
+are concerned about file system corruptions caused by potential hardware
+problems of kernel bugs, a better solution than mount-count-dependent
+checking is to use the
+.BR e2scrub (8)
+program. This does require placing the file system on an LVM volume,
+however.
.TP
.BI \-C " mount-count"
Set the number of times the filesystem has been mounted.
and
.IR tea .
.TP
+.BI encoding= encoding-name
+Enable the
+.I casefold
+feature in the super block and set
+.I encoding-name
+as the encoding to be used. If
+.I encoding-name
+is not specified, utf8 is used. The encoding cannot be altered if casefold
+was previously enabled.
+.TP
+.BI encoding_flags= encoding-flags
+Define parameters for file name character encoding operations. If a
+flag is not changed using this parameter, its default value is used.
+.I encoding-flags
+should be a comma-separated lists of flags to be enabled. The flags cannot be
+altered if casefold was previously enabled.
+
+The only flag that can be set right now is
+.I strict
+which means that invalid strings should be rejected by the file system.
+In the default configuration, the
+.I strict
+flag is disabled.
+.TP
.BI mount_opts= mount_option_string
Set a set of default mount options which will be used when the file
system is mounted. Unlike the bitmask-based default mount options which
There must be enough free space in the filesystem to create a journal of
that size.
.TP
+.BI fast_commit_size= fast-commit-size
+Create an additional fast commit journal area of size
+.I fast-commit-size
+kilobytes.
+This option is only valid if
+.B fast_commit
+feature is enabled
+on the file system. If this option is not specified and if
+.B fast_commit
+feature is turned on, fast commit area size defaults to
+.I journal-size
+/ 64 megabytes. The total size of the journal with
+.B fast_commit
+feature set is
+.I journal-size
++ (
+.I fast-commit-size
+* 1024) megabytes. The total journal size may be no more than
+10,240,000 filesystem blocks or half the total file system size
+(whichever is smaller).
+.TP
.BI location =journal-location
Specify the location of the journal. The argument
.I journal-location
.B 64bit
Enable the file system to be larger than 2^32 blocks.
.TP
+.B casefold
+Enable support for file system level casefolding.
+.B Tune2fs
+currently only supports setting this filesystem feature.
+.TP
.B dir_index
Use hashed b-trees to speed up lookups for large directories.
.TP
.B \-j
option.
.TP
+.TP
+.B fast_commit
+Enable fast commit journaling feature to improve fsync latency.
+.TP
.B large_dir
Increase the limit on the number of files per directory.
.B Tune2fs
.B Tune2fs
currently only supports setting this filesystem feature.
.TP
+.B stable_inodes
+Prevent the filesystem from being shrunk or having its UUID changed, in order to
+allow the use of specialized encryption settings that make use of the inode
+numbers and UUID.
+.B Tune2fs
+currently only supports setting this filesystem feature.
+.TP
.B uninit_bg
Allow the kernel to initialize bitmaps and inode tables lazily, and to
keep a high watermark for the unused inodes in a filesystem, to reduce
git://git.whamcloud.com / tools / e2fsprogs.git / blobdiff