"Can not find UUID" errors when booting and my root volume group contains local and multipath physical devices on Red Hat Enterprise Linux
Issue
- System shows "Can not find UUID" during boot. The errors are only occurring during boot and the system works properly once booted.
- Errors such as the following show up on the console at boot:
Couldn't find device with uuid a6Q5rq-xgT8-9pAG-mvb7-VyOh-1jlC-bMZL1O. Couldn't find device with uuid 8kRiET-pNEp-ZhMx-MLYx-3bTw-hR3k-Ejkqi3. Couldn't find device with uuid yYx8pJ-StD6-sW0L-DIhF-uCFC-JSpc-8SQgxe. Found volume group "VolGroup00" using metadata type lvm2 Couldn't find device with uuid a6Q5rq-xgT8-9pAG-mvb7-VyOh-1jlC-bMZL1O. Couldn't find device with uuid 8kRiET-pNEp-ZhMx-MLYx-3bTw-hR3k-Ejkqi3. Couldn't find device with uuid yYx8pJ-StD6-sW0L-DIhF-uCFC-JSpc-8SQgxe. 6 logical voulme(s) in volume group "VolGroup00" now active.
- Errors such as the following show up on the console at boot:
Environment
- Red Hat Enterprise Linux (RHEL), including:
- Red Hat Enterprise Linux 4 (RHEL4)
- Red Hat Enterprise Linux 5 (RHEL5)
- Device-mapper-multipath managing SAN disks (non-root)
- Root disk is an LVM logical volume
- LVM filter (in /etc/lvm/lvm.conf) includes only sda2 and multipath devices such as:
filter = [ "a/dev/mapper/mpath.*/", "a/dev/sda2/", "r/.*/" ] - LVM Physical disk containing root disk is on local disk (/dev/sda2)
- Root volume group contains sda2, as well as 3 multipath'd SAN-based volumes.
- LVM filter (in /etc/lvm/lvm.conf) includes only sda2 and multipath devices such as:
- The initrd file for the current kernel does not contain any device-mapper-multipath modules or code to load dm-multipath before the root filesystem is mounted:
# zcat /boot/initrd-2.6.18-274.el5 | cpio -itv | grep dm-multipath <no output>
Subscriber exclusive content
A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more.
