[kde-linux] ext4 Partition and KDE 4.3.4

[Duncan]

Dr. Edgar Alwers posted on Fri, 29 Jan 2010 23:20:21 +0100 as excerpted:

> I installed a new 500 GB internal disk on my box, which runs Linux from
> Scratch, kernel 2.6.32.2. On this disk, I formated a 50 GB partition
> with the ext4 system.
> My experiences:
> 1.) The system mounts the ext4 partition through fstab, ( type ext3,
> type ext4 is not yet recognised on fstab).
> 2.) On a console, I can e.g. copy a file to the ext4 partition. 3.) I
> cannot "speak" to this partition through dolphin. I get a message: error
> ocurred while accesing, wrong fs, bad superblock etc....
> 
> The compilation of the KDE4.3.4 was done before the new disk was
> mounted. But I rebuilt the kernel with the ext4 filesystem activated.
> 
> My questions:
> 1.) is dolphin ignoring my ext4 partition because it was build before
> the ext4 activation in the kernel ?
> 2.) Is dolphin ( 4.3.4 ) not yet "used" to ext4 ? If this is true, 3.)
> will dolphin kde 4.4 be familiar with the ext4 system ?
> 
> BTW., dolphin is only one example. I cannot mount the ext4 partition
> outside of fstab.

None of this has anything to do with KDE or its apps, except that they're 
simply other apps on the system not able to use the filesystem, because 
the filesystem cannot be properly mounted.

The problem is thus not with kde, but with your system apps.  You 
mentioned that you were using kernel 2.6.32.x, which I can confirm works 
well with ext4.  What versions of util-linux and e2fsprogs do you have?  
These contain the mount command and the various ext[234] utilities.  
Perhaps you're running outdated versions there.  FWIW, here's what I'm 
running on ~arch (~amd64 and ~x86, ~ indicates unstable version) gentoo, 
here:

util-linux-2.17
e2fsprogs-1.41.9

With those and kernel 2.6.32.x, I have absolutely no trouble mounting ext4 
fileystems as ext4, as set in fstab.  I know this as while I run reiserfs 
on my main disks on both my workstation and netbook, I'm running ext4. set 
to use no journal, on the thumbdrive I'm using to shuffle files back and 
forth using local rsync, until such time as I get the network properly 
setup to do it directly, without use of the thumbdrive as intermediary.  
Thus, that thumbdrive and the no-journal ext4 filesystems it contains, is 
getting a bit of a workout ATM, being mounted first on one system then the 
other, then rsynced as appropriate.  Believe me, if either the 32-bit 
native netbook or the 64-bit native workstation were incapable of mounting 
ext4 from fstab, I'd know it well by now!

-- 
Duncan - List replies preferred.   No HTML msgs.
"Every nonfree program has a lord, a master --
and if you use the program, he is your master."  Richard Stallman