Hi Warren,
This may not help much, except perhaps as a way to eliminate possible
causes, but I ran b134 with VirtualBox and guests on ZFS for quite a
long time without any such symptoms. My pool is a simple, unmirrored
one, so the difference may be there. I used shared folders without
incident. Guests include Linux (several distros, including RH), Windows,
Solaris, BSD.
--Jeff
On 09/12/10 11:05 AM, Warren Strange wrote:
I posted the following to the VirtualBox forum. I would be interested in
finding out if anyone else has ever seen zpool corruption with VirtualBox as a
host on OpenSolaris:
-----------------------------------------
I am running OpenSolaris b134 as a VirtualBox host, with a Linux guest.
I have experienced 6-7 instances of my zpool getting corrupted. I am wondering
if anyone else has ever seen this before.
This is on a mirrored zpool - using drives from two different manufacturers
(i.e. it is very unlikely both drives would fail at the same time, with the
same blocks going bad). I initially thought I might have a memory problem -
which could explain the simultaneous disk failures. After running memory
diagnostics for 24 hours with no errors reported, I am beginning to suspect it
might be something else.
I am using shared folders from the guest - mounted at guest boot up time.
Is it possible that the Solaris vboxsf shared folder kernel driver is causing
corruption? Being in the kernel, would it allow bypassing of the normal zfs
integrity mechanisms? Or is it possible there is some locking issue or race
condition that triggers the corruption?
Anecdotally, when I see the corruption the sequence of events seems to be:
- dmesg reports various vbox drivers being loaded (normal - just loading the
drivers)
- Guest boots - gets just pass grub boot screen to the initial redhat boot
screen.
- The Guest hangs and never boots.
- zpool status -v reports corrupted files. The files are on the zpool
containing the shared folders and the VirtualBox images
Thoughts?
--
Jeff Savit | Principal Sales Consultant
Phone: 602.824.6275
Email: jeff.sa...@oracle.com | Blog: http://blogs.sun.com/jsavit
Oracle North America Commercial Hardware
Operating Environments & Infrastructure S/W Pillar
2355 E Camelback Rd | Phoenix, AZ 85016
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