Linked by Thom Holwerda on Mon 9th Mar 2009 23:24 UTC
Linux Ext4 is the latest in a long line of Linux file systems, and it's likely to be as important and popular as its predecessors. As a Linux system administrator, you should be aware of the advantages, disadvantages, and basic steps for migrating to ext4. This article explains when to adopt ext4, how to adapt traditional file system maintenance tool usage to ext4, and how to get the most out of the file system.
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Better howto
by kev009 on Tue 10th Mar 2009 02:52 UTC
kev009
Member since:
2006-11-30

http://www.kev009.com/wp/2008/12/how-to-upgrade-to-ext4-in-place/

Read comments as well.

With 2.6.29 or an up to date stable (2.6.27/28) I see no reason not to use ext4 on new FS. Upgrading is a bit precarious, so you might want to try the process on a loop file or spare FS to get comfortable but I have done it on several machines without incident. The initial fsck messages may be a bit nerve racking depending on what features you change, but it should sort out. The biggest gotcha with Fedora was regenerating the initrd. On my module-less Gentoo servers, it was a bit easier.

Reply Score: 2

RE: Better howto
by sakeniwefu on Tue 10th Mar 2009 07:03 in reply to "Better howto"
sakeniwefu Member since:
2008-02-26

Backwards compatibility?

ext3 added a lot in exchange for nothing as partitions could still be read as regular ext2 from other operating systems such as Windows or BSD. This is important because ext3 and 4 features are very expensive if you just want to grab a few files as opposed to running off it.

With ext4 you lose all the backwards compatibility for very little.

Reply Parent Score: 2

RE[2]: Better howto
by kaiwai on Tue 10th Mar 2009 09:39 in reply to "RE: Better howto"
kaiwai Member since:
2005-07-06

Backwards compatibility?

ext3 added a lot in exchange for nothing as partitions could still be read as regular ext2 from other operating systems such as Windows or BSD. This is important because ext3 and 4 features are very expensive if you just want to grab a few files as opposed to running off it.

With ext4 you lose all the backwards compatibility for very little.


"for very little"? what the hell have you been smoking - what do you define as very little?

Good lord, what is it with these negative ext4 bashers coming out of the woodworks?

Reply Parent Score: 3

RE[2]: Better howto
by Fergy on Tue 10th Mar 2009 10:01 in reply to "RE: Better howto"
Fergy Member since:
2006-04-10

With ext4 you lose all the backwards compatibility for very little.

I thought ext4 gave you a big performance boost for free. I think it's nice that you can choose more performance or keep compatibility with old systems.

Reply Parent Score: 2

RE: Better howto
by aaronb on Wed 11th Mar 2009 23:03 in reply to "Better howto"
aaronb Member since:
2005-07-06

There has been some issues pointed out with regards to ext4 that Theodore Ts'o has addressed in the below link.

https://bugs.edge.launchpad.net/ubuntu/+source/linux/+bug/317781/com...

Reply Parent Score: 2