2 .\" Copyright 1997 by Theodore Ts'o. All Rights Reserved.
4 .\" .TH RESIZE2FS 8 "@E2FSPROGS_MONTH@ @E2FSPROGS_YEAR@" "E2fsprogs version @E2FSPROGS_VERSION@"
5 .TH RESIZE2FS 8 "@E2FSPROGS_MONTH@ @E2FSPROGS_YEAR@" "E2fsprogs version @E2FSPROGS_VERSION@"
7 resize2fs \- ext2/ext3/ext4 file system resizer
28 program will resize ext2, ext3, or ext4 file systems. It can be used to
29 enlarge or shrink an unmounted file system located on
31 If the filesystem is mounted, it can be used to expand the size of the
32 mounted filesystem, assuming the kernel supports on-line resizing. (As
33 of this writing, the Linux 2.6 kernel supports on-line resize for
34 filesystems mounted using ext3 and ext4.).
38 parameter specifies the requested new size of the filesystem.
39 If no units are specified, the units of the
41 parameter shall be the filesystem blocksize of the filesystem.
44 parameter may be suffixed by one of the following the units
45 designators: 's', 'K', 'M', or 'G',
46 for 512 byte sectors, kilobytes, megabytes, or gigabytes, respectively.
49 of the filesystem may never be larger than the size of the partition.
52 parameter is not specified, it will default to the size of the partition.
54 Note: when kilobytes is used above, I mean
56 power-of-2 kilobytes, (i.e., 1024 bytes), which some politically correct
57 folks insist should be the stupid-sounding ``kibibytes''. The same
58 holds true for megabytes, also sometimes known as ``mebibytes'', or
59 gigabytes, as the amazingly silly ``gibibytes''. Makes you want to
64 program does not manipulate the size of partitions. If you wish to enlarge
65 a filesystem, you must make sure you can expand the size of the
66 underlying partition first. This can be done using
68 by deleting the partition and recreating it with a larger size or using
70 if you're using the logical volume manager
73 recreating the partition, make sure you create it with the same starting
74 disk cylinder as before! Otherwise, the resize operation will
75 certainly not work, and you may lose your entire filesystem.
78 run resize2fs to resize the ext2 filesystem
79 to use all of the space in the newly enlarged partition.
81 If you wish to shrink an ext2 partition, first use
83 to shrink the size of filesystem. Then you may use
85 to shrink the size of the partition. When shrinking the size of
86 the partition, make sure you do not make it smaller than the new size
87 of the ext2 filesystem!
91 Turns on various resize2fs debugging features, if they have been compiled
94 should be computed by adding the numbers of the desired features
95 from the following list:
97 2 \-\ Debug block relocations
99 4 \-\ Debug inode relocations
101 8 \-\ Debug moving the inode table
103 16 \-\ Print timing information
106 Forces resize2fs to proceed with the filesystem resize operation, overriding
107 some safety checks which resize2fs normally enforces.
110 Flush the filesystem device's buffer caches before beginning. Only
111 really useful for doing
116 Shrink the filesystem to the minimum size.
119 Prints out a percentage completion bars for each
121 operation during an offline resize, so that the user can keep track
122 of what the program is doing.
125 Print the minimum size of the filesystem and exit.
127 .B \-S \fIRAID-stride
130 program will heuristically determine the RAID stride that was specified
131 when the filesystem was created. This option allows the user to
132 explicitly specify a RAID stride setting to be used by resize2fs instead.
134 The minimum size of the filesystem as estimated by resize2fs may be
135 incorrect, especially for filesystems with 1k and 2k blocksizes.
138 was written by Theodore Ts'o <tytso@mit.edu>.
140 Resize2fs is Copyright 1998 by Theodore Ts'o and PowerQuest, Inc. All
144 may be redistributed under the terms of the GPL.