Fedora21/22 grub doesn't recognize my raid1/LVM partitions

[John Wright]

On Sat, 11 Jul 2015, John Wright wrote:

>
> I have 2 500G hard drives partitioned with a few 'normal' partitions
> for /boot, swap, etc but mostly in a raid 1 array, which is divided
> into several LVM partitions.  For many Fedora releases, I have done
> fresh installs, preserving the /home LVM partition, and rotating the
> root partition among several 30-40G LVM partitions for /. This has
> always worked splendidly until Fedora 21/22.  Recently I decided that
> it was time to move up to Fedora 22, and with failing that, to
> Fedora 21. I have tried several Fedora 22 and Fedora 21.
> live install disks (desktop, server) and the server isos.  With the
> live disks, the installer doesn't see my existing LVM partitions,
> so I can't try to install into them.  With the 21 and 22 server
> isos, the installer sees the LVM partitions and appears to proceed
> normally, but the final reboot boots into a grub rescue shell, and
> the only partition visible to this shell is my /boot partition. I
> also tried the Fedora 22 netinstall iso, which also ultimately
> resulted in reboot into the grub rescue shell.
>
> I have googled several variations of 'grub doesn't recognize LVM
> partitions' without turning up anything helpful.
>
> Have there been changes to the LVM software that might result in
> an incompatibility between grub and older LVM versions?
>
> Best,
>
> 	-jmw-
>

Bug report filed, bugzilla Bug 1242193

 	-jmw-