I second this, when a drive shits the bed a sata controller handles it better, some times with a USB adapter you mess the whole bus up and need a reboot of the machine (from using them on windows experience)

From the location of that script usr lib virt-sysprep looks to be a script put in the image by the provided to do a few things on first boot. Would have thought it was normal, but you can always ask them to double check