>-----Original Message----- >From: dm-devel-bounces@xxxxxxxxxx [mailto:dm-devel-bounces@xxxxxxxxxx] On >Behalf Of Alasdair G Kergon >Sent: Sunday, July 22, 2007 4:16 AM >To: device-mapper development >Subject: Re: Question about dmevents > >On Sun, Jul 22, 2007 at 10:43:17AM +0200, Peter Rockai wrote: >> In fact, when using theh libdevmapper-event library, the client-side >> code should already fail, if a device has no uuid. In practice, this >> means that uuid-less devices cannot be monitored, but that is probably >> a case that is not really important (or is it?). >> I would probably prefer to just document this as requirement and keep >> things as they are. Comments? > >That all makes sense to me. Agreed :) > > name = user-friendly reference; can be changed at will > uuid = software-friendly reference, a constant for the life of the device > >If we have existing software not setting up uuids then those programs need >investigating. > I have a question though, not being too familiar with the device-mapper core code. When I load a fresh system using FC7 on a raid1 volume (for example) I never see a prompt during the installation asking if I would like to have a UUID assigned. After the install I check and there isn't one assigned by default. If I then add some disks to the system and decide to install an LVM2 mirror I do this using the command line and there is a UUID assigned by default. Is this also a bug in the installer? Or is there a way I can assign a UUID to an already existing system? In the documentation it says I would have to delete my volume group and rebuild it to assign a UUID is this correct? If so how can a fresh system get a UUID? Thank you for all the help :) Brian Wood Intel Corporation Digital Enterprise Group Manageability & Platform Software Division brian.j.wood@xxxxxxxxx >Alasdair >-- >agk@xxxxxxxxxx > >-- >dm-devel mailing list >dm-devel@xxxxxxxxxx >https://www.redhat.com/mailman/listinfo/dm-devel -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
