Problem pri bootovani z LVM na degradovaom MD RAID 1

Posted on February 27, 2015, 11:15 am, by tomas, under a vsetko ostatne co preslo okolo, hardware.
Jedna sa o bug https://bugs.launchpad.net/ubuntu/+source/lvm2/+bug/1351528


workaround:
- add break=premount to grub kernel line entry
- for continued visibility of text boot output also remove quiet, splash and possibly set gxmode 640x480


now @ initramfs prompt:
mdadm --detail /dev/md0 should indicate a state of clean, degraded, array is started so this part is ok


lvm lvs output attributes are as follows:
-wi-d---- (instead of the expected -wi-a----)
lvs manpage this means device tables are missing (device mapper?)


FIX: simply run lvm vgchange -ay and exit initramsfs. This will lead to a booting system.


Chyba je sposobena nevypopulovanim /dev/mapper v pripade ze RAID je v degradovanom stave. 
Workaround je: 




  * Add new file /usr/share/initramfs-tools/scripts/init-premount/10hack-raid-udev


#!/bin/sh

sleep 5

udevadm trigger –action=add

exit 0


chmod a+x /usr/share/initramfs-tools/scripts/init-premount/10hack-raid-udev


* update-initramfs -u




							


			

										
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