ext3升级到ext4文件系统

copy from

`/lib/modules/2.6.18-164.15.1.el5/kernel/drivers/md/dm-region_hash.ko' [elf64-x86-64] to `/tmp/initrd.qO3680/lib/dm-region_hash.ko' [elf64-x86-64] copy from `/lib/modules/2.6.18-164.15.1.el5/kernel/drivers/md/dm-message.ko' [elf64-x86-64] to `/tmp/initrd.qO3680/lib/dm-message.ko' [elf64-x86-64] copy from `/lib/modules/2.6.18-164.15.1.el5/kernel/drivers/md/dm-raid45.ko' [elf64-x86-64] to `/tmp/initrd.qO3680/lib/dm-raid45.ko' [elf64-x86-64] copy from `/lib/modules/2.6.18-164.15.1.el5/kernel/lib/crc16.ko' [elf64-x86-64] to `/tmp/initrd.qO3680/lib/crc16.ko' [elf64-x86-64] copy from `/lib/modules/2.6.18-164.15.1.el5/kernel/fs/jbd2/jbd2.ko' [elf64-x86-64] to `/tmp/initrd.qO3680/lib/jbd2.ko' [elf64-x86-64] copy from `/lib/modules/2.6.18-164.15.1.el5/kernel/fs/ext4/ext4.ko' [elf64-x86-64] to `/tmp/initrd.qO3680/lib/ext4.ko' [elf64-x86-64] /sbin/dmraid.static -> /tmp/initrd.qO3680/bin/dmraid /sbin/kpartx.static -> /tmp/initrd.qO3680/bin/kpartx Adding module ehci-hcd Adding module ohci-hcd Adding module uhci-hcd Adding module jbd Adding module ext3 Adding module scsi_mod Adding module sd_mod Adding module libata Adding module ata_piix Adding module usb-storage Adding module dm-mem-cache

Adding module dm-mod Adding module dm-log

Adding module dm-region_hash Adding module dm-message Adding module dm-raid45 Adding module crc16 Adding module jbd2 Adding module ext4

重启

[root@USER-SERVER ~]# reboot

三、格式转换

[root@USER-SERVER ~]# umount /dev/sda5 [root@USER-SERVER ~]# tune2fs -O

has_journal,extents,huge_file,flex_bg,uninit_bg,dir_nlink,extra_isize /dev/sda5

tune2fs 1.41.12 (17-May-2010)

Please run e2fsck on the filesystem.

四、修改转换文件系统错误并挂载

[root@USER-SERVER ~]# e2fsck -fDC0 /dev/sda5 -y [root@USER-SERVER ~]# mount -t ext4 /dev/sda5 /www

五、修改文件系统信息(重要！否则重启后会还原为ext3) 将

LABEL=/www /www ext3 defaults 1 2

修改为

LABEL=/www /www ext4 defaults 1 2 [root@USER-SERVER ~]# vi /etc/fstab

oot@USER-SERVER ~]# vi /etc/fstab LABEL=/ / ext3 defaults 1 1 LABEL=/www /www ext4 defaults 1 2 LABEL=/boot /boot ext3 defaults 1 2 tmpfs /dev/shm tmpfs defaults 0 0

devpts /dev/pts devpts gid=5,mode=620 0 0 sysfs /sys sysfs defaults 0 0 proc /proc proc defaults 0 0

LABEL=SWAP-sda3 swap swap defaults 0 0

六、升级后状态

ext4的特征全激活了：）

#[root@USER-SERVER ~]# tune2fs -l /dev/sda5 | grep extent

Filesystem features: has_journal resize_inode dir_index filetype needs_recovery extent flex_bg sparse_super large_file huge_file uninit_bg dir_nlink extra_isize

[root@USER-SERVER ~]# df -T

Filesystem Type 1K-blocks Used Available Use% Mounted on

/dev/sda2 ext3 20315844 2310764 16956440 12% / /dev/sda1 ext3 194442 20563 163840 12% /boot tmpfs tmpfs 1029672 0 1029672 0% /dev/shm

/dev/sda5 ext4 129863460 192192 122968152 1% /www

参考文献

? ?

http://fedorasolved.org/Members/rasker/converting-an-ext3-root-partition-to-ext4-in-Fedora-10

http://kernelnewbies.org/Ext4#head-3891522e0601162aab24c73c1f148a1e28c6a9d4