ext4 support

If you have a question about a file system (for example xfs, reiserfs, ...)

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zmdmw52
Posts: 2
Joined: Sun Aug 10, 2008 5:31 pm

ext4 support

Post by zmdmw52 » Wed Jan 20, 2010 7:12 pm

I have just installed the latest (beta) version of partimage (0.6.9) on Ubuntu 9.04.

Is the ext4 file system supported by this version ?
If not supported, is it planned in a future release of partimage ?

Thanks,

feffer
Posts: 126
Joined: Tue Mar 17, 2009 4:30 am

Post by feffer » Wed Jan 20, 2010 9:24 pm

From the Partimage docs Under Limitations
Warning: Partimage does not support ext4 and btrfs filesystems. If you need an ext4 / btrfs support or if you need modern features (checksumming, multi-thread compression, encryption, flexibility in the size) you should try FSArchiver.

btw, I believe FSArchiver is mainly (or only) a linux tool.

candtalan
Posts: 1
Joined: Fri Feb 18, 2011 5:13 pm
Location: Bracknell UK

EXT4?

Post by candtalan » Sat Mar 12, 2011 3:06 pm

It would be really good to have support for EXT4, it is in common use now.

thanks

Hartmut
Posts: 26
Joined: Thu Aug 26, 2010 10:06 am

Re: EXT4?

Post by Hartmut » Tue Mar 15, 2011 9:05 am

candtalan wrote:It would be really good to have support for EXT4, it is in common use now.

thanks
Well - it is open source, so you're very welcome to code the ext4 support ;)
A description can be found at
https://ext4.wiki.kernel.org/index.php/Main_Page
Especially the Extent-based design is the hugest change.

aidfarh
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Joined: Tue Mar 29, 2011 9:38 am

Post by aidfarh » Tue Mar 29, 2011 9:41 am

partimage works perfectly well with the ext4 partitions on my Ubuntu box. How is that so?

Hartmut
Posts: 26
Joined: Thu Aug 26, 2010 10:06 am

Post by Hartmut » Tue Mar 29, 2011 10:03 am

aidfarh wrote:partimage works perfectly well with the ext4 partitions on my Ubuntu box. How is that so?
Is it a new partition, or upgraded from ext3?
Did you backup and restore?
EXT4 is somehow an extended EXT3, but with some new features. So therefore it could (from partimage) be seen as a "strange" EXT3. But it is dangerous, because partimage doesn't have any knowledge of the new strukture special to EXT4 - don't use it at an essential and productive system!

golimar
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Joined: Wed Dec 07, 2011 5:59 pm
Location: Spain

Post by golimar » Wed Dec 07, 2011 6:05 pm

Wikipedia says (http://en.wikipedia.org/wiki/Ext4) that

"The ext3 file system is partially forward compatible with ext4, that is, an ext4 filesystem can be mounted as an ext3 partition. However, if the ext4 partition uses extents (a major new feature of ext4), then the ability to mount the file system as ext3 is lost."

I guess you weren't using extents in your system, can you check it?
aidfarh wrote:partimage works perfectly well with the ext4 partitions on my Ubuntu box. How is that so?

carol_walker
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Joined: Thu Sep 15, 2011 7:00 am
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Post by carol_walker » Tue Dec 13, 2011 7:12 am

The EXT4 file-system option is listed next to the other file-systems supported for installation by Ubuntu. The EXT4 support for the GRUB boot-loader in Ubuntu 9.04 was already committed and is in place.

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