Device missing, status is "unknown", after Physical Volume partition table was modified
Issue
-
LVM volumes disappear after reboot. Syslog messages show
unknown partition table
.hostname kernel: sdX: unknown partition table
-
LVM reports a device is missing ("unknown" status)
# pvs Couldn't find device with uuid aaaaaa-bbbb-cccc-dddd-eeee-ffff-gggggg. <----+ PV VG Fmt Attr PSize PFree | /dev/sda1 VolGroup01 lvm2 a-- 4.99G 4.99G | unknown device VolGroup01 lvm2 a-m 5.00G 5.00G | ---+--- | | | +----------- device with specfied UUID not found on any device scanned --+
-
The previous disk with this UUID appears to be present and available on the system
# cat /proc/partitions | grep sdX 253 16 10485760 sdX # ls -l /dev/sdX brw-r----- 1 root disk 253, 16 Mar 11 13:54 /dev/sdX
-
The device may have recently had a partition added or removed within the existing partition table
- Few disks have lost partitions within the partition table after reboot
Environment
- Red Hat Enterprise Linux (RHEL)
- Partition(s) created on Physical device.
- Logical Volume Manager (PV is on physical device partition)
- Device-mapper-multipath with partitions created on multipath devices.
- Partition(s) created on Physical device.
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