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https://www.linode.com/community/questions/1139/lvm-issues-was-quotdevmappercontrolopen-failedquot
If you're running a 2.4 kernel, I don't believe the linode kernels have device mapper patched in. The 2.6 kernels appear to have it enabled however. If you type cat /proc/devices, look for an entry like "254 device-mapper" under block devices. If that's not there, you don't have DM.
https://www.linuxquestions.org/questions/linux-kernel-70/device-mapper-missing-from-kernel-699528/
Jul 26, 2010 · Device-mapper missing from kernel I'm running Kubuntu Intrepid 8.10 with kde-4.1.96 kernal-2.6.27-9 ivtv at first look, it's good, drivers in place but when I run KMPlayer or Tvtime I have no picture or invalid argument.
https://www.linuxquestions.org/questions/slackware-14/lvm-type-raid1-modules-missing-from-installer-kernel-4175578149-print/
- That it is looking for the module created by CONFIG_DM_RAID=m set as in the kernel config. I'm a little uncertain on this, because it looks like CONFIG_DM_RAID should already be set to "m" if you're using the stock huge or generic kernel + config. Display the config for the currently running kernel, showing just the CONFIG_DM_RAID line;
https://github.com/travis-ci/travis-ci/issues/1493
Oct 07, 2013 · When trying to run grml-debootstrap (a tool, which is able to create Debian virtual machine images), I've run into an error: /proc/devices: No entry for misc found Is device-mapper driver missing from kernel? Failure to communicate with ...
https://community.oracle.com/thread/882622
Aug 14, 2009 · dcaba wrote: I've installed OEL5u3 device-mapper and device-mapper-multipath rpms. Although I understand is not a supported/certified configuration (because of the different kernel versions), mpath is now working. I conclude, then, that we are affected by a device-mapper bug, present in the OVM shipped versions.Weird.
https://cdn.kernel.org/pub/linux/utils/boot/dracut/dracut.html
Like above, but <device>, <filesystem type> and <filesystem options> are determined by looking at the current mounts. --add-device <device> Bring up <device> in initramfs, <device> should be the device name. This can be useful in hostonly mode for resume support when your swap is on LVM or an encrypted partition.
https://bugzilla.redhat.com/show_bug.cgi?id=484419
+++ This bug was initially created as a clone of Bug #484415 +++ Description of problem: The multipath-tools components rely on being able to retrieve vendor/product information from sysfs in order to match storage controllers to their configurations. The CCISS driver does not export these attributes. Version-Release number of selected component (if applicable): All RHEL5 kernels.
https://www.centos.org/forums/viewtopic.php?t=60511
Jan 03, 2000 · Yesterday I ran yum update to get a new kernel and 398 other updated packages. After that my RAID 5 volume will no longer mount. ... device-mapper target type "raid45" is not in the kernel RAID set "isw_bhciaebdeh_WBP Volume1" was not activated ... General Support ↳ CentOS 8 - Hardware Support ↳ CentOS 8 - Networking Support ↳ CentOS 8 ...
https://forums.gentoo.org/viewtopic-t-1000396-start-0.html
Sep 29, 2014 · I have created my kernel with my necessary cipher support (Serpent), along with device mapper, crypt target, and initramfs support. I am using OpenRC, not systemd. I am using lvm, with unencrypted boot partition (internal drive), with my gpg luks key on usb drive (external). This is what my fstab looks like..
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