Name
EXT3_FS — Third extended file system support
This is the journaling version (called ext3
) of the second extended file system,
the de facto standard Linux file system for hard disks.
The journaling code included in this driver means you do not have to run fsck (file system checker) on your file systems after a crash. The journal keeps track of any changes that were being made at the time the system crashed, and can ensure that your file system is consistent without the need for a lengthy check.
Other than adding the journal to the file system, the on-disk
format of ext3
is identical to
ext2
. It is possible to freely
switch between using the ext3
driver and the ext2
driver, as long
as the file system has been cleanly unmounted, or fsck is run on the file system before the switch.
To add a journal on an existing ext2
file system or change the behavior of
ext3
file systems, you can use the
tune2fs utility. To modify
attributes of files and directories on ext3
file systems, use chattr. You need e2fsprogs
version 1.20 or later in order to
create ext3
journals (available at
http://sourceforge.net/projects/e2fsprogs).
Get Linux Kernel in a Nutshell now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.