On 11/2/07, Tim Verhoeven <tim.verhoeven.be at gmail.com> wrote: > On Nov 2, 2007 8:14 PM, Art Baldini <rootajb at gmail.com> wrote: > > Hi All, > > I am trying to create an MD device. I am using the command: > > /sbin/mdadm --create --a /dev/md12 --level=1 --run --raid-devices=2 > > /dev/sda12 /dev/sdb12 > > to create the device, and to dynamically create the device file if needed. > > What I want is the device file to be created as /dev/md12, but with the -a > > flag it creates it as /dev/md<first unwsed minor number>. > > > > I have tried various options to the -a or --auto, but cannot seem to find > > the correct syntax. From the man page it says: > > -a, --auto{=no,yes,md,mdp,part,p}{NN} > > Instruct mdadm to create the device file if needed, and to > > allocate an unused > > minor number. "yes" or "md" causes a non-partitionable array > > to be used. > > "mdp", "part" or "p" causes a partitionable array (2.6 and > > later) to be used. > > The argumentment can also come immediately after "-a". e.g. > > "-ap". > > > > Am I doing something wrong, or is there no way to get mdadm to automatically > > create a specific device file. > > I've done it like this : > > mdadm --create /dev/md12 --auto=yes --level=1 --run --raid-devices=2 /dev/... > The only difference is that he is doing -a rather than --auto=yes. I get the same result as Art is getting when I do it your way. You can still access it as /dev/md12, but it shows up in /proc/mdstat as /dev/md0 (which is, well, weird). Cheers...james