On 23/12/2010, at 5:35 AM, Eric Blake wrote: <snip> > Should we refuse to make snapshots if we don't detect the GNU extension > of 'dd iflag=fullblock'? Probably safe to do on GNU/Linux machines, but > I'm wondering if it will have negative effects on BSD machines where GNU > coreutils is not installed. As a thought, that option isn't known to the dd supplied with OSX 10.6.5: $ dd if=/dev/zero of=foo bs=1024 count=1 1+0 records in 1+0 records out 1024 bytes transferred in 0.000041 secs (24970740 bytes/sec) $ rm foo $ dd if=/dev/zero of=foo bs=1024 count=1 iflag=fullblock dd: unknown operand iflag $ -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list