PPC64 system drops into emergency shell when rebooting first time after installation of SLES 12 SP2
This document (7018238) is provided subject to the disclaimer at the end of this document.
[ 2.412928] linux multipath: sda: failed to get udev uid: Invalid argument [ 2.413062] linux multipath: sda: failed to get udev uid: Invalid argument ...
[ 5.794004] linux mount: mount: /dev/sda2 is already mounted or /sysroot busy [ 5.794546] linux systemd: sysroot.mount: Mount process exited, code=exited status=32 [ 5.794740] linux systemd: Failed to mount /sysroot.
1) Enable system updates during installation
This is the preferred solution as it installs a fixed sg3_utils package (minimum required is sg3_utils-1.43-12.1.ppc64le.rpm) right away.
Register the system during installation at a SMT, SUSE Manager or directly at the customer center.
The registration stack will ask if update repositories should be enabled. Allow that to install updates.
2) System is not yet installed, but will not have access to update servers
Copy the latest sg3_utils rpm (minimum requirement: sg3_utils-1.43-12.1.ppc64le.rpm) from the update channels and install it on the system sometime during the installation.
Once YaST2 is running, there's a root shell available on console 2. Hit <ctrl>-<alt>-<F2> to get there.
Alternatively, during the installation but way before the first reboot, copy a fixed version of 55-scsi-sg3_id.rules to /mnt/etc/udev/rules.d/ and recreate the initrd using "mkinitrd" command. Only after that it's save to reboot. Note: once the installation has finished and yast prepares for the reboot, the later root partition is unmounted, so there are some time constraints. Again, Solution #1 is preferred and strongly recommended. If Solution #2 fails, continue with Solution #3
A copy of a fixed 55-scsi-sg3_id.rules files can be downloaded here: TID7018238-55-scsi-sg3_id.rules.tgz
Make sure to check md5sum before using!
# md5sum TID7018238-55-scsi-sg3_id.rules.tgz
NOTE: This file must be removed after the sg3_utils package had been updated to the fixed version (sg3_utils-1.43-12.1.ppc64le.rpm or later). Also the initrd must be recreated then!
3) Installation is finished, system has rebooted and is stuck in emergency mode already
Reboot the system into a rescue system booted from the SLES 12 SP2 installation DVD
If necessary start multipath and network
mount the root partition to /mnt
mount /dev, sys, proc, run into the resp. directories below /mnt
then continue with the steps from 2)
Example (multipath enabled):
systemctl start multipathd
mount /dev/mapper/<root-device> /mnt
for i in /sys /dev /proc /run ; do mount -o bind $i /mnt/$i ; done
cp <wherever 55-scsi-sg3_id.rules is located> /etc/udev/rules.d/
The next reboot should complete as expected.
The change for the file 55-scsi-sg3_id.rules in the sg3_utils package constructs a fallback WWID from the data in VPD 0x80 (which the ibmvscsi devices support). This enables multipathd to set up the devices correctly.
This Support Knowledgebase provides a valuable tool for SUSE customers and parties interested in our products and solutions to acquire information, ideas and learn from one another. Materials are provided for informational, personal or non-commercial use within your organization and are presented "AS IS" WITHOUT WARRANTY OF ANY KIND.
- Document ID:7018238
- Creation Date: 04-Nov-2016
- Modified Date:03-Mar-2020
- SUSE Linux Enterprise Server
For questions or concerns with the SUSE Knowledgebase please contact: tidfeedback[at]suse.com