On Fri, 24 May 2013, Gelen James wrote: > centos 6 failed to create entries under /dev for newly created loopback devices. Any one know why? and how to fix/workaround it? > > The steps to duplicate is pretty simple > > dd if=/dev/zero of=/tmp/deleteme bs=1M count=100 > losetup /dev/loop0 /tmp/deleteme > fdisk /dev/loop0 ## created partitions 1, 2, etc. > fdisk -l /dev/loop0 ## confirmed that the partitions do exist At this point, you need to run "kpartx -a /dev/loop0" (fdisk should have told you so). > mkfs.ext3 /dev/loop0p1 ## failed here [...] kpartx drops partitions into /dev/mapper, so the actual invocation would be mkfs.ext3 /dev/mapper/loop0p1 You can also use partprobe instead of kpartx, but I'm not as familiar with its operation. -- Paul Heinlein heinlein at madboa.com 45°38' N, 122°6' W