resize2fs 修改ext2 ext3文件系统的大小 (普通分区也可，或者解决inode不够的问题)
resize2fs - ext2 file system resizer
resize2fs 是 ext2 文件系统大小调整工具
可以扩大 可以缩小原ext2分区（当然 ext3只是多了 Journal的ext2 也可以）
需要注意的是 增大的话
起始柱面不能变
步骤就是：
先fdisk 调整分区
所谓调整 也就是删了相关的分区 再重建分区
最后在分区上再用 resize2fs 调整文件系统大小
所以一个概念 或者说对照就是
文件系统(file system)是在分区(Partition)基础上的
resize2fs 是 ext2 文件系统大小调整工具
可以扩大 可以缩小原ext2分区（当然 ext3只是多了 Journal的ext2 也可以）
需要注意的是 增大的话
起始柱面不能变
步骤就是：
先fdisk 调整分区
所谓调整 也就是删了相关的分区 再重建分区
最后在分区上再用 resize2fs 调整文件系统大小
所以一个概念 或者说对照就是
文件系统(file system)是在分区(Partition)基础上的
# rpm -qf /sbin/resize2fs
e2fsprogs-1.32-15.1
# rpm -qil e2fsprogs
Name : e2fsprogs Relocations: (not relocatable)
Version : 1.32 Vendor: Red Hat, Inc.
Release : 15.1 Build Date: Mon 04 Oct 2004 10:23:16 PM CST
Install Date: Mon 17 Jan 2005 03:36:34 PM CST Build Host: tweety.build.redhat.com
Group : System Environment/Base Source RPM: e2fsprogs-1.32-15.1.src.rpm
Size : 1069923 License: GPL
Signature : DSA/SHA1, Thu 18 Nov 2004 05:35:43 AM CST, Key ID 219180cddb42a60e
Packager : Red Hat, Inc.
URL : http://e2fsprogs.sourceforge.net/
Summary : Utilities for managing the second extended (ext2) filesystem.
Description :
The e2fsprogs package contains a number of utilities for creating,
checking, modifying, and correcting any inconsistencies in second
extended (ext2) filesystems. E2fsprogs contains e2fsck (used to
repair filesystem inconsistencies after an unclean shutdown), mke2fs
(used to initialize a partition to contain an empty ext2 filesystem),
debugfs (used to examine the internal structure of a filesystem, to
manually repair a corrupted filesystem, or to create test cases for
e2fsck), tune2fs (used to modify filesystem parameters), and most of
the other core ext2fs filesystem utilities.
You should install the e2fsprogs package if you need to manage the
performance of an ext2 filesystem.
/lib/evms/libe2fsim.1.2.1.so
/lib/libcom_err.so.2
/lib/libcom_err.so.2.0
/lib/libe2p.so.2
/lib/libe2p.so.2.3
/lib/libext2fs.so.2
/lib/libext2fs.so.2.4
/lib/libss.so.2
/lib/libss.so.2.0
/lib/libuuid.so.1
/lib/libuuid.so.1.2
/sbin/badblocks
/sbin/debugfs
/sbin/dumpe2fs
/sbin/e2fsck
/sbin/e2image
/sbin/e2label
/sbin/findfs
/sbin/fsck
/sbin/fsck.ext2
/sbin/fsck.ext3
/sbin/mke2fs
/sbin/mkfs.ext2
/sbin/mkfs.ext3
/sbin/resize2fs
/sbin/tune2fs
/usr/bin/chattr
/usr/bin/lsattr
/usr/bin/uuidgen
/usr/sbin/mklost+found
/usr/share/doc/e2fsprogs-1.32
/usr/share/doc/e2fsprogs-1.32/README
/usr/share/doc/e2fsprogs-1.32/RELEASE-NOTES
/usr/share/man/man1/chattr.1.gz
/usr/share/man/man1/lsattr.1.gz
/usr/share/man/man1/uuidgen.1.gz
/usr/share/man/man3/libuuid.3.gz
/usr/share/man/man3/uuid_clear.3.gz
/usr/share/man/man3/uuid_compare.3.gz
/usr/share/man/man3/uuid_copy.3.gz
/usr/share/man/man3/uuid_generate.3.gz
/usr/share/man/man3/uuid_generate_random.3.gz
/usr/share/man/man3/uuid_generate_time.3.gz
/usr/share/man/man3/uuid_is_null.3.gz
/usr/share/man/man3/uuid_parse.3.gz
/usr/share/man/man3/uuid_time.3.gz
/usr/share/man/man3/uuid_unparse.3.gz
/usr/share/man/man8/badblocks.8.gz
/usr/share/man/man8/debugfs.8.gz
/usr/share/man/man8/dumpe2fs.8.gz
/usr/share/man/man8/e2fsck.8.gz
/usr/share/man/man8/e2image.8.gz
/usr/share/man/man8/e2label.8.gz
/usr/share/man/man8/findfs.8.gz
/usr/share/man/man8/fsck.8.gz
/usr/share/man/man8/fsck.ext2.8.gz
/usr/share/man/man8/fsck.ext3.8.gz
/usr/share/man/man8/mke2fs.8.gz
/usr/share/man/man8/mkfs.ext2.8.gz
/usr/share/man/man8/mkfs.ext3.8.gz
/usr/share/man/man8/mklost+found.8.gz
/usr/share/man/man8/resize2fs.8.gz
/usr/share/man/man8/tune2fs.8.gz
# fdisk /dev/sdb
The number of cylinders for this disk is set to 8924.
There is nothing wrong with that, but this is larger than 1024,
and could in certain setups cause problems with:
1) software that runs at boot time (e.g., old versions of LILO)
2) booting and partitioning software from other OSs
(e.g., DOS FDISK, OS/2 FDISK)
Command (m for help): p
Disk /dev/sdb: 73.4 GB, 73407868928 bytes
255 heads, 63 sectors/track, 8924 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdb1 * 1 522 4192933+ 82 Linux swap
/dev/sdb2 523 783 2096482+ 83 Linux
/dev/sdb3 784 1436 5245222+ 83 Linux
/dev/sdb4 1437 8924 60147360 f Win95 Ext'd (LBA)
/dev/sdb5 1437 8924 60147328+ 83 Linux
Command (m for help): d
Partition number (1-5): 3
Command (m for help): p
Disk /dev/sdb: 73.4 GB, 73407868928 bytes
255 heads, 63 sectors/track, 8924 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdb1 * 1 522 4192933+ 82 Linux swap
/dev/sdb2 523 783 2096482+ 83 Linux
/dev/sdb4 1437 8924 60147360 f Win95 Ext'd (LBA)
/dev/sdb5 1437 8924 60147328+ 83 Linux
Command (m for help): d
Partition number (1-5): 2
Command (m for help): n
Command action
l logical (5 or over)
p primary partition (1-4)
p
Partition number (1-4): 2
First cylinder (523-8924, default 523):
Using default value 523
Last cylinder or +size or +sizeM or +sizeK (523-1436, default 1436):
Using default value 1436
Command (m for help): p
Disk /dev/sdb: 73.4 GB, 73407868928 bytes
255 heads, 63 sectors/track, 8924 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdb1 * 1 522 4192933+ 82 Linux swap
/dev/sdb2 523 1436 7341705 83 Linux
/dev/sdb4 1437 8924 60147360 f Win95 Ext'd (LBA)
/dev/sdb5 1437 8924 60147328+ 83 Linux
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
# resize2fs -p /dev/sdb2 7341705
resize2fs 1.32 (09-Nov-2002)
The containing partition (or device) is only 1835426 blocks.
You requested a new size of 7341705 blocks.
Syncing disks.
# resize2fs 1.32 (09-Nov-2002)
The containing partition (or device) is only 1835426 blocks.
You requested a new size of 7341705 blocks.
Syncing disks.
# e2fsck -f /dev/sdb2
e2fsck 1.32 (09-Nov-2002)
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
/var: 599/262144 files (4.5% non-contiguous), 74698/524120 blocks
# resize2fs -p /dev/sdb2
resize2fs 1.32 (09-Nov-2002)
Begin pass 1 (max = 40)
Extending the inode table XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
The filesystem on /dev/sdb2 is now 1835008 blocks long.
然后 mount 上 ls 一下 就发现 原来 sdb2 的区大了 还有 sdb3 的东西也在
RESIZE2FS(8) RESIZE2FS(8)
NAME
resize2fs - ext2 file system resizer
SYNOPSIS
resize2fs [ -d debug-flags ] [ -f ] [ -F ] [ -p ] device [ size ]
DESCRIPTION
The resize2fs program will resize ext2 file systems. It can be used to
enlarge or shrink an ext2 file system located on device so that it will
have size blocks. If the size parameter is not specified, it will
default to the size of the partition. The size parameter may never be
larger than the size of the partition.
The resize2fs program does not manipulate the size of partitions. If
you wish to enlarge a filesystem, you must first make sure you can
expand the size of the underlying partition first. This can be done
using fdisk(8) by deleting the partition and recreating it with a
larger size. When recreating the partition, make sure you create it
with the same starting disk cylinder as before! Otherwise, the resize
operation will certainly not work, and you may lose your entire
filesystem.
If you wish to shrink an ext2 partition, first use resize2fs to shrink
the size of filesystem. Then you may use fdisk(8) to shrink the size
of the partition. When shrinking the size of the partition, make sure
you do not make it smaller than the new size of the ext2 filesystem!
OPTIONS
-d debug-flags
Turns on various resize2fs debugging features, if they have been
compiled into the binary. debug-flags should be computed by
adding the numbers of the desired features from the following
list:
1 - Print out all disk I/O
2 - Debug block relocations
8 - Debug inode relocations
16 - Debug moving the inode table
-p Prints out a percentage completion bars for each resize2fs oper-
ation, so that the user can keep track of what the program is
doing.
-f Forces resize2fs to proceed with the filesystem resize opera-
tion, overriding some safety checks which resize2fs normally
enforces.
-F Flush the filesystem device's buffer caches before beginning.
Only really useful for doing resize2fs time trials.
AUTHOR
resize2fs was written by Theodore Ts'o .
COPYRIGHT
Resize2fs is Copyright 1998 by Theodore Ts'o and PowerQuest, Inc. All
rights reserved. As of April, 2000 Resize2fs may be redistributed
under the terms of the GPL.
SEE ALSO
fdisk(8), e2fsck(8), mke2fs(8)
E2fsprogs version 1.32 November 2002 RESIZE2FS(8)
转载自：http://windtear.net/archives/2005/09/14/000771.html