Re: [gentoo-user] dracut: mount: special device /dev/disk/by-label/usr does not exist

[Dale]

Jc García wrote:
>
> 2014-03-16 8:24 GMT-06:00 Dale <rdalek1967@×××××.com
> <mailto:rdalek1967@×××××.com>>:
>
>     Howdy,
>
>     I got this when rebooting after we had a power outage.  I have a
>     UPS so
>     I was able to perform a regular shutdown.
>
>
>     [    2.567061] hub 8-1:1.0: state 7 ports 4 chg 0000 evt 0000
>     [    2.567069] hub 8-1:1.0: hub_suspend
>     [    2.579644] usb 8-1: usb auto-suspend, wakeup 1
>     [    2.591677] hub 8-0:1.0: hub_suspend
>     [    2.591682] usb usb8: bus auto-suspend, wakeup 1
>     [    3.362374] dracut: root has been mounted 29 times without being
>     checked, check forced.
>     [    3.363014] dracut: root: 28323/1525920 files (0.4%
>     non-contiguous),
>     580665/6102684 blocks
>     [    3.364957] dracut: Mounting
>     /dev/disk/by-uuid/888352dd-9c91-4a9f-9595-cd0e74b74ee7 with -o
>     defaults,ro
>     [    3.474224] EXT4-fs (sda6): mounted filesystem with ordered data
>     mode. Opts: (null)
>     [    3.522894] dracut: Mounted root filesystem /dev/sda6
>     [    3.568630] dracut: Mounting /usr with -o defaults,ro
>     [    3.600028] dracut: mount: special device
>     /dev/disk/by-label/usr does
>     not exist
>
>
> Seems like the block device for /usr couldn't be found by it's label,
> root partition seems fine after check and properly mounted, so I'd say
> it has nothing to do.
>
>
>     [    3.601749] dracut Warning: Mounting /usr to /sysroot/usr failed
>     [    3.602452] dracut Warning: *** Dropping you to a shell; the system
>     will continue
>     [    3.603419] dracut Warning: *** when you leave the shell.
>     [    3.604892] dracut Warning:
>     [    3.849621] blkid (2070) used greatest stack depth: 4576 bytes left
>     + '[' -f /run/initramfs/init.log ']'
>     root@fireball / #
>
>
>     It seems to me that the / file system needed to be checked.  For that
>     reason, it couldn't mount /usr after the check was performed.
>      That's my
>     thinking on this.  Anyone think otherwise?  Is this a one off event or
>     should I be concerned about this?
>
>
> Is the block device corresponding to /usr available under another
> directory in /dev?  if not something wrong might be going on with that
> block device.
> I personally prefer using UUIDs for finding partitions at boot, they
> are more fail-proof.

Well, after that, it booted fine.  I forgot to mention that it did boot
without me doing anything but letting it proceed.  I *think* I typed
exit or something to get it to keep going. 


>
>     Is there some way to avoid this in the future without disabling file
>     system check for /?
>
>
> Again, maybe UUIDs.

I tried that once and grub didn't like it.  May need to see if things
have improved in that area since. 


>
>     Another related LVM question.  I have some partitions on LVM.  If I
>     moved the drives to another system, would the new LVMs be found on the
>     new system or is there some magic involved to find and get them
>     mounted?  Example.  My /home is on its own LVM partition.  If I moved
>     the drive that has that on it, would the new system see it or would I
>     have to do something to make it see it?  I suspect and wouldn't
>     want it
>     to mount automatically.  I'd just want to be able to see it and
>     mount it
>     if needed.  Sort of a question I have always wondered about.
>
>
>
> On my experience as long, as udev and lvm are running on the receiving
> system, they should be found and placed for access under /dev, not
> mounted automatically.
> if for some reason it doesnt happen, its easy to do a 'pvscan' to see
> if the physical volume is recognized, and if it is, 'vgchange -ay
> volume_group_name ' activates all LVs.
>
>
>     Thanks much.
>
>     Dale
>
>     :-)  :-)
>

That's my thinking to but I have never had the chance to test it.  I
figured the info is stored on the drive and moves wherever the drives
goes as long as LVM is running. 

Thanks much. 

Dale

:-)  :-) 

-- 
I am only responsible for what I said ... Not for what you understood or how you interpreted my words!