Symptoms
Applying the global filter setting in lvm.conf file, causing the host not to recognize the internal devices under RAID Configuration any more. Unable to boot the system after setting a 'global_filter' in '/etc/lvm/lvm.conf' but able to boot the system if the 'global_filter' is commented out.
The Error occurring during boot:
Timed out waiting for device dev-mapper-rhel00\x2dhome.device.
Dependency failed for /home.
Dependency failed for Local File Systems.
Dependency failed for Relabel all filesystems, if necessary.
Dependency failed for Mark the need to relabel after reboot.
Dependency failed for Migrate local SELinux policy changes from the old store structure to the new structure.
/ and /home was not able to get mounted while the filter settings were ON in the lvm.conf file
Cause
The internal devices are under RAID control; since it is a local boot setup, the / and /home are created on the local disk and the SCSI disk representation for them is '/dev/md*'. There is no entry to accept '/dev/md*' in the global filter and hence causing the host to not accept the internal devices when the filter is applied in lvm.confThe physical Volume looks like this: Physical volume PV Name /dev/md126p3 VG Name rhel00
Resolution
Modify the filter to accept all md* devices as below to be able discover the device and to mount / and /home as well when the server is booting:
global_filter = [ "a|/dev/./by-id/scsi-35001173101465378.|", "a|/dev/./by-id/scsi-0123456789abcdfc0.|", "a/md./",* "a/emcpower./", "r/sd./", "r/disk.*/" ]
