How to convert ext4 to JFS

[Nguyen_Phi_Long]

Dear supporters.
I already installed ubuntu 12.04.3 on my machine.
/dev/sda1 /boot/efi EFI 200MB
/dev/sda2 / ext4 2Tb
/dev/sda3 not mount JFS 1Tb
now, system operate well.
I would like to convert ext4 to JFS file sytem. it's mean /dev/sda2 is converted to JFS format.
I searched on google but I cannot see clear info for this.
Anybody please help me.
please give me your suggestion how to do that.

thank you so much.

[kc1di]

Here's a page to a scrip (http://www.linux-magazine.com/Online/Features/Converting-Filesystems-with-Fstransform)t that will transform the file system for you. (I've never used it so can't say how well it works)
only other way I know of to do what you want would be to do a complete new install.
good Luck ;)
You may also want to read this page (https://help.ubuntu.com/community/LinuxFilesystemsExplained) before deciding to convert.

[oldfred]

Generally ext4 is better for most uses.

http://www.phoronix.com/scan.php?page=article&item=9way_linux317_fs&num=1