[CentOS] /dev/disk/by-uuid missing
Michael Schumacher
michael.schumacher at pamas.de
Wed Aug 20 11:02:19 UTC 2014
hmmm,
nobody has an idea?
Michael
Sunday, August 17, 2014, 10:30:54 PM, I wrote:
> hi!
> I got a problem with one of my servers where the boot process fails,
> because it cannot find its root partition.
> My /boot/grub/grub.conf uses to look like
> ---8<---
> title CentOS (2.6.32-431.17.1.el6.x86_64)
> root (hd0,0)
> kernel /vmlinuz-2.6.32-431.17.1.el6.x86_64 ro
> root=UUID=8ef1f6cb-5dfc-497e-83d0-8d91cbbe4939 rd_NO_LUKS
> LANG=en_US.UTF-8 rd_NO_MD quiet SYSFONT=latarcyrheb-sun16 rhgb
> crashkernel=auto rd_NO_DM rd_NO_LVM KEYBOARDTYPE=pc KEYTABLE=de
> initrd /initramfs-2.6.32-431.17.1.el6.x86_64.img
> ---8<--
> I could get the system to boot again by just replacing the
> "root=UUID-..." part with "root=/dev/sdb3"
> when I started looking around, I noticed that the "/dev/disk"by-uuid"
> directory was not there. The "by-id" as well as the "by-path"
> directories were both there. I tried to create directory and the links
> in the directory manually, but they were gone after the next reboot.
> I assume that these /dev/disk/ entries are created by some process at
> boot time, but I have no clue how this is done nor what is wrong with
> my system.
> I checked what blkid -L says, but this seems to be OK.
> ---8<---
> device fs_type label mount point UUID
> -----------------------------------------------------------------------------------------
> /dev/sda1 ext4 /mnt/raid
> a574f30b-fa43-4e34-8498-1cb29c4c261f
> /dev/sdb1 ext4 /boot
> 01746f38-6289-4b03-8011-bfac89ed89bd
> /dev/sdb2 swap <swap>
> 903a51b7-393d-4df9-9b58-f06a0a80a748
> /dev/sdb3 ext4 /
> 8ef1f6cb-5dfc-497e-83d0-8d91cbbe4939
> ---8<---
> Any help?
> btw., the problem appeared when I installed a 18TB raid array. I had
> to compile the e2fsprogs from the most recent sources using this
> recipe
> http://blog.ronnyegner-consulting.de/2011/08/18/ext4-and-the-16-tb-limit-now-solved
> to install a very large ext4 file system on the raid disk.
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