I have followed the howto here: http://www.howtoforge.com/virtualiz...aravirtualization-and-hardware-virtualization I'm trying to install on a Dell R720 with a hardware RAID5 configuration and 4 cores. The RAID's configured so I have a single ~3TB volume, /dev/sda I've followed the tutorial all the way to the point where I reboot into my new kernel. When booting, xen.gz appears and loads properly, then the kernel also appears to load but ends up in a kernel panic with the following output: ... dracut Warning: No root device "block:/dev/mapper/vg_cbcxen-lv_root" found dracut Warning: LVM vg_cbcxen/lv_swap not found dracut Warning: LVM vg_cbcxen/lv_root not found Obviously it's having problems finding my LVMs or a required driver isn't loading. I've searched the web but to no avail. Hoping someone here can point me in the right direction... My grub.conf is as follows: Code: default=0 timeout=30 splashimage=(hd0,0)/grub/splash.xpm.gz hiddenmenu title CentOS (2.6.32.57-2.el6xen.x86_64) root (hd0,0) kernel /xen.gz dom0_mem=1024M cpufreq=xen dom0_max_vcpus=4 dom0_vcpus_pin module /vmlinuz-2.6.32.57-2.el6xen.x86_64 ro root=/dev/mapper/vg_cbcxen-lv_root nomodeset rd_NO_LUKS rd_LVM_LV=vg_cbcxen/lv_swap LANG=en_US.UTF-8 rd_LVM_LV=vg_cbcxen/lv_root rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM module /initramfs-2.6.32.57-2.el6xen.x86_64.img title CentOS (2.6.32-279.el6.x86_64) root (hd0,0) kernel /vmlinuz-2.6.32-279.el6.x86_64 ro root=/dev/mapper/vg_cbcxen-lv_root nomodeset rd_NO_LUKS rd_LVM_LV=vg_cbcxen/lv_swap LANG=en_US.UTF-8 rd_LVM_LV=vg_cbcxen/lv_root rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet initrd /initramfs-2.6.32-279.el6.x86_64.img Version and file info: Code: [root@cbcxen ~]# rpm -qa | grep xen xen-libs-4.1.3-1.el6.x86_64 xen-runtime-4.1.3-1.el6.x86_64 xen-4.1.3-1.el6.x86_64 kernel-xen-2.6.32.57-2.x86_64 kernel-xen-release-6-3.noarch xen-licenses-4.1.3-1.el6.x86_64 xen-hypervisor-4.1.3-1.el6.x86_64 xen-devel-4.1.3-1.el6.x86_64 [root@cbcxen ~]# ls -l /boot/ total 52801 -rw-r--r--. 1 root root 101820 Jun 22 19:44 config-2.6.32-279.el6.x86_64 -rw-r--r-- 1 root root 95612 May 25 11:25 config-2.6.32.57-2.el6xen.x86_64 drwxr-xr-x. 3 root root 1024 Aug 18 23:41 efi drwxr-xr-x. 2 root root 1024 Aug 20 22:13 grub -rw-r--r--. 1 root root 14822507 Aug 18 23:41 initramfs-2.6.32-279.el6.x86_64.img -rw-r--r-- 1 root root 12620635 Aug 20 21:43 initramfs-2.6.32.57-2.el6xen.x86_64.img drwx------. 2 root root 12288 Aug 18 23:08 lost+found -rw-r--r--. 1 root root 179157 Jun 22 19:45 symvers-2.6.32-279.el6.x86_64.gz -rw-r--r-- 1 root root 157712 May 25 11:25 symvers-2.6.32.57-2.el6xen.x86_64.gz -rw-r--r--. 1 root root 2341856 Jun 22 19:44 System.map-2.6.32-279.el6.x86_64 -rw-r--r-- 1 root root 2178713 May 25 11:25 System.map-2.6.32.57-2.el6xen.x86_64 -rwxr-xr-x. 1 root root 3986608 Jun 22 19:44 vmlinuz-2.6.32-279.el6.x86_64 -rw-r--r-- 1 root root 3495856 May 25 11:25 vmlinuz-2.6.32.57-2.el6xen.x86_64 -rw-r--r--. 1 root root 737584 Aug 11 12:08 xen-4.1.3.gz lrwxrwxrwx. 1 root root 12 Aug 18 23:56 xen-4.1.gz -> xen-4.1.3.gz lrwxrwxrwx. 1 root root 12 Aug 18 23:56 xen.gz -> xen-4.1.3.gz -rw-r--r--. 1 root root 13317834 Aug 11 12:08 xen-syms-4.1.3 [root@cbcxen ~]# parted GNU Parted 2.1 Using /dev/sda Welcome to GNU Parted! Type 'help' to view a list of commands. (parted) print all Model: DELL PERC H710 (scsi) Disk /dev/sda: 2999GB Sector size (logical/physical): 512B/512B Partition Table: gpt Number Start End Size File system Name Flags 1 1049kB 525MB 524MB ext4 boot 2 525MB 2999GB 2998GB lvm Error: partition length of 5735235584 sectors exceeds the loop-partition-table-imposed maximum of 4294967295 Model: Linux device-mapper (linear) (dm) Disk /dev/mapper/vg_cbcxen-lv_swap: 8305MB Sector size (logical/physical): 512B/512B Partition Table: loop Number Start End Size File system Flags 1 0.00B 8305MB 8305MB linux-swap(v1) Model: Linux device-mapper (linear) (dm) Disk /dev/mapper/vg_cbcxen-lv_root: 53.7GB Sector size (logical/physical): 512B/512B Partition Table: loop Number Start End Size File system Flags 1 0.00B 53.7GB 53.7GB ext4 Note that I'm planning on shrinking that /home volume and setting up LVM based VMs. TIA for any assistance...
Further progressing down the track of trial and error, I thought the problem might be related to a lack of LVM support in the initramfs that the new kernel was loading, so I made my own with pretty much everything in it that could be used. Here's the command I used to do it after booting into my good kernel. Code: dracut --force -a 'base lvm kernel-modules dm rootfs-block' --add-drivers 'scsi_mod scsi_wait_scan ext4 megaraid_sas sd_mod ahci wmi dm_mirror dm_region_hash dm_log dm_mod tg3' --nomdadmconf --lvmconf -v /boot/initramfs-2.6.32.57-2.el6xen.x86_64.img 2.6.32.57-2.el6xen.x86_64 It didn't work, but since there's a lack of examples around for this command I thought I'd post it anyway. I realize that there's some addition fluff in there that I don't need. Trial and error. So my initramfs definitely has LVM and Dell PERC driver support in it, must be a configuration issue. I'm almost out of ideas.... Help?
Tried updating the megaraid_sas module as per this article: http://www.mentby.com/pasi-kaerkkae...boot-and-work-with-delllsi-raid-adapters.html Didn't help in my case.
