dmsetup and udev have the functionality needed to do this in a race-free manner, but it's necessarily complicated and takes a while to get your head around it. You'll need to use the dmsetup commands/options for udev cookies described in the man page. Alasdair -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
