unable to create permanent physical volume on /dev/hdc

Hi,

I have a machine with 4 disks assigned to LVM. I recently re-installed this machine and upgraded it to a custom compiled 2.6 kernel (2.6.7 to be specific) but now I'm having troubles recreating my LVM. I have assigned /dev/hda6, /dev/hdb, /dev/hdc en /dev/hdd to LVM with the 'pvcreate' command without any error (I did run the dd command from the howto first). When I run 'pvs' I see my 4 physical volumes, however when I run 'pvscan' it only lists 3 of the 4 physical volumes. /dev/hdc is missing from the list. When I run 'pvs' again it now also only shows 3 of the 4 physical volumes. However if I run 'pvs /dev/hdc' it shows me my 4 physical volumes, 'pvscan' always shows only 3. Also after running 'pvscan', I can run 'pvcreate' again on /dev/hdc without any error and running 'pvs' without any arguments will show 4 volumes.

I have no problems creating a primary partition spanning the disk. However running 'pvcreate /dev/hdc1' also works without an error but it still won't show up in a pvscan. What could be the problem that hdc won't be a physical volume or what commands could/should I run to more accurately debug/fix the problem ??

The system is running on Debian 3.0 upgraded to testing and I have a duplicate with the same setup that is running without any problem. Also LVM2 is working perfectly using the 3 working physical volumes.

Check the config file (/etc/lvm/lvm.conf) for filters. By default /dev/cdrom is filtered out on Debian systems and this often gets mapped to /dev/hdc. Which would cause those symptoms.

Simply comment out the active "filter = " line and run vgscan.

patrick

Thanks, this is probably the case. I disconnected hdc and hdd and hooked up a dvd-rom to do the re-install which was /dev/hdc during the re-install. I will check later today when I have access to the machine.

There is no doubt about precisely when folks began racing each other in automobiles. It was the day they built the second automobile. -- Richard Petty