The danger in using /dev/dm-x is that there is no guarantee that the same device will show up at the same place after a reboot. Seeing as you use disklabels, this becomes a non-issue. Aside from that, I am not aware of any other reasons not to use /dev/dm-x -----Original Message----- From: linux-cluster-bounces@xxxxxxxxxx [mailto:linux-cluster-bounces@xxxxxxxxxx] On Behalf Of Don Hoover Sent: woensdag 5 mei 2010 20:03 To: linux-cluster@xxxxxxxxxx Subject: Get qdisk to use /dev/mapper/mpathx devices insteadof /dev/dm-x I have recently learned that its dangerous to use /dev/dm-x devices for LVM because they do not function correctly with multipath, and that you should always use the /dev/mapper/mpathx devices. Something about the fact that udev actually destroys and recreates the dm devices when paths change. But, qdisk seems to prefer using dm-x devices. Is there a way to get it to prefer using /dev/mapper/mpathx devices if they are available? I know you can spec the device instead of the label, but I would like to avoid that. -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.814 / Virus Database: 271.1.1/2853 - Release Date: 05/05/10 08:26:00 -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
