[Mageia-dev] System doen't boot with LVM

Mon Feb 18 15:55:16 CET 2013

* Colin Guthrie (mageia at colin.guthr.ie) wrote:
+> 'Twas brillig, and Olivier Thauvin at 18/02/13 12:48 did gyre and gimble:
+> > So ok, I just update my freshly installed mga2 to cauldron using network
+> > install (live upgrade don't work, it seems urpmi fail to find a way to
+> > update the system w/o filesystem).
+> > 
+> > I have the exact same result: it don't boot.
+> 
+> Hmm, re: live upgrade are you meaning just a urpmi based upgrade? If so,
+> I've done a few similar updates in the last week or so in VMs and it's
+> always been OK. I presume you installed the mageia-prepare-upgrade
+> package from mga2/core/updates_testing, rebooted to the boot menu entry
+> created by that package before upgrading?
+
+Ha, no, I followed the howto on the wiki:
+https://wiki.mageia.org/en/Feature:UsrMove
+
+and there is no reference to this package on the page :\
+
+> Regarding the network install based upgrade there may be issues relating
+> to bootloader config tools (in drakx) that related the use of the blkid
+> cache which might make it miss the whole LVM volume (I've seen it
+> manifest itself as putting "root=/dev/" into grubs menu.lst rather than
+> "root=/dev/mapper/foo").
+
+The entry in grub is fine (just checked it).
+
+> >> In the dracut shell, what does /etc/cmdline.d/lvm.conf say? It should
+> >> contain enough info to brink up both the root and the swap lvm.
+> > 
+> > rd.lvm.lv=sagittarius/swap
+> 
+
+> The problem is that dracut itself is not detecting that the LV needs
+> activating when it runs.
+> 
+> 
+> In order to get a booting system, just pass "rd.lvm.lv=sagitarius/slash"
+> on the command line (obviously substituting the real name of your
+> logical volume). This should make dracut initialise the lvm automatically.
+
+This method did work and I am now under linux.
+
+What can I do to understand why dracut did not detect the lvm to
+activate properly (and hopefully fix this definitivelly) ?
+
+> 
+> You should (at least in theory) also just be able to type something like
+> "lvm vgchange -ay" into the dracut shell, then type exit (perhaps twice)
+> to continue the boot process.
+
+This has work except I was unable to enter my passphrase to read my
+encrypted /home.
+
+But it's good to know this is posible.
+
+-- 
+
+Olivier Thauvin
+CNRS  -  LATMOS
+♖ ♘ ♗ ♕ ♔ ♗ ♘ ♖
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