id summary reporter owner description type status component version resolution keywords cc guest host 6240 ISO Images creates I/O state inconsistent error csusbtech I have only experienced this issue while trying to install on a guest machine, but when you use an ISO image Virtualbox will randomly crash. I was trying to install a Debian guest on to my Mac 10.5 host and I could never get past disk partitioning. I know nothing about Virtualbox's I/O systems but perhaps this is happening because Virtualbox must access the hard drive for both reading as a CD and writing as a hard drive (if that makes sense), it seems like the I/O cannot negotiate releasing the hard drive from reading to allow write (because it is in use in two different ways?) defect closed virtual disk VirtualBox 3.1.4 fixed Linux Mac OS X