different behaviour ubuntu virtualbox and real ubuntu

[JeanC]

Hello

I installed vb in windows xp with kubuntu 8.04 as guest.

I also have a real ubuntu on the same machine through dual boot (which has a virtual box with a windows guest )

Now when I do in the xp host / ubuntu guest

Code: Select all

mkvmerge -i /somesharedfolder/somebigfile.mkv

I get 'the source file could not be opened, or rtetrieving its size by seeking to the end did not work' for all my files.

It works fine in the real ubuntu. Other programs also have issues (mediainfo).

What could this be?
The files are on a sharedfolder and on another pc in the network.I can read/write to those shares without problem.

Edit: I found one file where this work ok, this file is a lot smaller, those others are all 4 gb or above, could this be filesize related?

Edit2: It must be something in the mount of the share, if I copy an offending file to the local guest drive things work.
I mount those shares in fstab with 'sharename directory vboxsf defaults 0 0'.

Edit3: The problem was solved by mounting those shares with cifs in stead of vboxsf.

[Sasquatch]

How are the two shares mounted in the Host? Does it do the same if you use a local file on the Host of that size? None of the Hosts use FAT32?

[JeanC]

Hoi daar

I solved the problem by mounting through cifs in stead of vboxsf.

Your questions:
Those are all windows ntfs shared drives.
If I use a local file the problem is indeed gone.

[Sasquatch]

It already seemed strange to mount a network share through shared folders from the host when it's possible to access them directly from the VM. Glad it's solved.