Comment 5 for bug 574665

i can confirm this issue. virtio plus guest volumes (qcow2/raw seems irrelevant, tried both with errors) >1T causes image corruption. the used disk space in the guests did not matter in my case. io errors showed sometimes at 10gb, sometimes later when already ~750gb were copied onto the virtual disk.

additionally, lucid 10.04 server partitioner freezes while trying to create ext4 fs on virtual disk > 1T with virtio. only workaround here was to run setup with ide driver, switching to virtio afterwards. but again, that caused disk corruption after some time (varied between minutes and days).

atm using one 250G virtio raw image and one 2T ide raw image stable without any flaws.