Virtualbox 4 on Ext4 error – host I/O cache will now be enabled

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If you’re running virturalbox 4 on ext4 file system, while installing a virtual machine you might get a warning message says:

“The virtual machine execution may run into an error condition as described below. We suggest that you take an appropriate action to avert the error.
The host I/O cache for at least one controller is disabled and the medium ‘/home/MyUserName/.VirtualBox/HardDisks/Ubuntu_LAMP.vdi’ for this VM is located on an ext4 partition. There is a known Linux kernel bug which can lead to the corruption of the virtual disk image under these conditions.
Either enable the host I/O cache permanently in the VM settings or put the disk image and the snapshot folder onto a different file system.
The host I/O cache will now be enabled for this medium.”

This’s Linux kernel issue, and it is not necessary for normal user to concern about. Just follow what it said in the warning to enable “host I/O cache” and the issue fixed safely.

6 users responded in " Virtualbox 4 on Ext4 error – host I/O cache will now be enabled "

Tweets that mention Virtualbox 4 on Ext4 error – host I/O cache will now be enabled -- Topsy.com said, in January 7th, 2011 at 11:05 pm

[…] This post was mentioned on Twitter by MARTIN CALDERON. MARTIN CALDERON said: RT @Ubuntuka: Virtualbox 4 on Ext4 error – host I/O cache will now be enabled http://goo.gl/fb/1DKW5 […]

Med Berdai said, in January 8th, 2011 at 8:41 am

Thanks. However, as far as I can recall this appeared since VBox 3.2.8.

someone said, in February 17th, 2011 at 2:17 pm

thanks, i was getting craizy with this 🙂

Carlos said, in July 5th, 2011 at 6:32 pm

i would like to add that I have also experienced this problem, and have seen it get exacerbated when running vms with more than 2GB of memory. I haven’t figured out if this is because I’m running a 32 bit host or what but my vms (running zimbra) would constantly crash with what I initially thought were memory leaks and high I/O from the mysql database. I’ve now been running the two zimbra vms, along with 5 other vms at 2GB or less and all seems in harmony once again.

lance said, in January 13th, 2012 at 1:36 am

It didn’t work on RHEL 6 x86_64 🙁

wagner said, in May 5th, 2012 at 5:14 pm

Obrigado. Thanks

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Virtualbox 4 on Ext4 error – host I/O cache will now be enabled

6 users responded in " Virtualbox 4 on Ext4 error – host I/O cache will now be enabled "

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