Public bug reported:
I have attached an external drive to mount on boot up of 10.04 server (Lucid).
It's label is "WAD" and is located and mounted via the following fstab entry:
LABEL=WAD /mnt/WAD auto relatime,errors
=remount-ro 0 2
It's pretty generic and usually mounts either a ext3 or ext4 file
system.
However, If this drive is detached or powered down for some reason - Then the
entire boot process hangs!
There is no way to continue. You can switch terminals, But can not drop to any
command line or even login.
So you can't easily fix the problem either. ctrl-alt-del will initiate a
shutdown/restart.
Also booting into recovery mode exhibits the same problem.
The only way I could recover this server (As I had no live cd available) was to
hit alt-sysreq-i (Kill all tasks)
The process's it killed are as follow: (This may give a hint to where it is
hanging!?)
udev
portmap
statd
mountall
plymouth
Then it stated: General error mounting filesystems.
And droped into a terminal (Thank God), So I could fix fstab (remove the
external drive entry).
I feel this is a pretty serious issue. It almost forced me to reinstall the
server.
(Only chance made me press Alt-SysRq-ScrollLock to give me Magic Key Help)
** Affects: ubuntu
Importance: Undecided
Status: New
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Boot hangs and unable to continue when automount disk in fstab is not available
(Off or Disconnected)
https://bugs.launchpad.net/bugs/571444
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