On 09.10.2011, at 17:46, Peter Maydell wrote: > On 9 October 2011 16:01, Alexander Graf <ag...@suse.de> wrote: >> cache=writeback survives host crashes. The only reason writethrough >> is the default is Windows XP which doesn't issue flushes properly, >> so there cache=writeback can lead to data loss. Linux guests are fine. > > I thought that only applied to disks attached via protocols > (IDE, SCSI) that supported a flush command? SD cards don't, > so no guest issues flushes.
Ouch, really? Now that makes SDs even worse than I thought :) Alex
