how to move /var to other partition?

[sluge]

Hello! I tryed to move my /var to other partiton. (/dev/md0)
So, I
1) mkdir /newvar
2) mount /dev/md40 /newvar
3) cp -Rax /var /newvar
4) mv /var /oldvar
4) change fstab to mount /var to /dev/md40

So, after reboot I'got errors:
Calling the system activity data collector (sadc): Cannot open /var/log/sa/sa11: Permission denide

System logger [FAILED]

And system run at 1 runlevel, why?

[jpollard]

Boot single user mode and be sure all mounts are up, then try "restorecon /var".

I bet the security labels are wrong.

another possibility is that the boot system (systemd if using F15/16) requires /var to be available immediately after mounting root read write so it can start dbus... which makes /var impossible to move to a different filesystem (yeah sucks).

You might try delaying the system logger till after it mounts.

[sluge]

Yes, you are right, it was selinux. I run restorecon /var and ot boottime selinux restored all security data

[Gareth Jones]

Originally Posted by jpollard

another possibility is that the boot system (systemd if using F15/16) requires /var to be available immediately after mounting root read write so it can start dbus... which makes /var impossible to move to a different filesystem (yeah sucks).

It wouldn't be that, I have /var on a separate partition and it's never caused a problem.

Merging / and /usr is one thing, but any boot system that couldn't cope with a separate /var would be fundamentally broken...

Gareth

[jpollard]

And that is also my opinion on mergins / and /usr.

It completely defeats the meaning of "read only root" since you can no longer do it.

well, without resorting to a union mount of some kind.