Hi all,

I had some VirtualBox hassle over the weekend.

It started with thes messages inside the VM, a Ubuntu 10.04 Server
(running Zimbra).

2012-03-30T18:37:11.581591+11:00 mail kernel: [4520695.304357] sd
4:0:0:0: [sdd] Unhandled error code
2012-03-30T18:37:15.201744+11:00 mail kernel: [4520695.304362] sd
4:0:0:0: [sdd] Result: hostbyte=DID_OK driverbyte=DRIVER_TIMEOUT
2012-03-30T18:37:15.201753+11:00 mail kernel: [4520695.304366] sd
4:0:0:0: [sdd] CDB: Write(10): 2a 00 02 1d 44 f8 00 00 08 00
2012-03-30T18:37:15.201756+11:00 mail kernel: [4520695.304457]
end_request: I/O error, dev sdd, sector 35472632
2012-03-30T18:37:15.201758+11:00 mail kernel: [4520695.312601]
__ratelimit: 9 callbacks suppressed
2012-03-30T18:37:15.201761+11:00 mail kernel: [4520695.312604] Buffer
I/O error on device sdd, logical block 4434079
2012-03-30T18:37:15.201763+11:00 mail kernel: [4520695.321978] lost
page write due to I/O error on sdd

Two hours later it moves to another disk: "sd 3:0:0:0: [sdc] Unhandled
error code"

The Linux reacts with a read-only remount - practically the box is falling over.

The VDI disks are on a ZFS filesystem, and I scrubbed the ZVolume and
looked for other possible problems - host-side all seamt to be okay.

I restarted the system once - and for a few hours it worked, untiul I
see the same problem again.

A second reboot is not that successful, I cannot start the VM headless
anymore, getting a

Result Code: NS_ERROR_FAILURE (0x00004005)

I have a second machine with the same setup and continous mirroring of
the disks (zfs send/receive) - the same result.

Tried an older ZFS snapshot of the VDI disks - still not starting.

It was FreeBSD 8.2 and VirtualBox 4.0.4, and some people with similar
problems when the VirtualBox kernel module and system where outy of
sync.

I did some port upgrades recently but left VirtualBox alone. Hmmh..
Anyway, I started upgading to the newest VirtualBox in the
ports(4.1.18). Under 8.2 the rebuild does not seem to work anymore, it
has some clang related compile errors (apologize that I do not have
the detail, it is a dodgy macro with "clang" in it).

So I upgraded the base system to 9-STABLE first and was able to build
VirtualBox 4.1.18 now. (with a minor hickup, libpcre.so.0 not found, I
just symlinked .1 against ist)

Still the same error:
Result Code: NS_ERROR_FAILURE (0x00004005)

So I decided to go home to get access to the X11-GUI (on the road I
had ssh only). I thought of rebuilding a new VM with the same disks
(because of some forum suggestions the config could be corrupted).

To my astonishment the system started!

And now I can start it headless again!

I am at loss to explain it, maybe someone else may have a clue?

Regards
Peter
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