Tom H wrote: > Bob Proulx wrote: > > I have not myself used LVM mirroring. I have only used mdadm MD > > mirroring. This means I am fuzzy on your exact configuration. But > > the above tells me that you have the root volume directly on lvm using > > the rootVG-rootLV volume. Which is fine. > > [AIUI (I've never used this) LVM mirroring is like mdraid level1 but > instead of mirroring partitions, you're mirroring LVs.] Just a small detail of words but as I understand it lvm mirrors PVs (physical volumes) not LVs (logical volumes). But this is simply language and words and doesn't change anything technical. PV1\ ----- /LV1 PV2->-VG1-<-LV2 PV3/ ----- \LV3 > Could the problem be the reverse of the earlier LVM-over-MDRAID thread > whereby changing "root=/dev/mapper/rootVG-rootLV" to > "root=/dev/mapper/rootVG/rootLV" will allow the system to boot?! Good idea. But not without a typo correction. I am sure you meant to say /dev/rootVG/rootLV instead because /dev/mapper/rootVG/rootLV does not ever exist. But I think that /dev/mapper/rootVG-rootLV will exist if anything does. One of the earlier discussion threads was that /dev/rootVG/rootLV didn't exist until udev was kicked with a reboot but that the /dev/mapper version was available immediately. https://lists.debian.org/debian-user/2012/12/msg00420.html https://lists.debian.org/debian-user/2012/12/msg00407.html Bob
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