[svlug] What is with labels?

Karl Larsen k5di at zianet.com
Sat Nov 8 05:34:55 PST 2003

On Fri, 7 Nov 2003, Larry Colen wrote:

> I'm trying to upgrade my system and rh9 is spazzing out because I've 
> got directory subtrees that are symbolic links to trees on other
> partitions. 

	Yes I can see how that would zap the installer. 

> For example /usr is a partition and /vault is a partiion but
> /usr/local is a symbolic link to /vault/local (I ran out of space on
> the /usr partition).  I wanted to move /usr from /dev/hda6 to
> /dev/hda11 (which used to be /vault).  
> I made the changes in /etc/fstab:
> LABEL=/usr           /oldusr                 ext3    defaults        1  2
> LABEL=/vault              /usr                    ext3    defaults   1 2
> And that sort of seems to work. It perturbs my sense of aesthetic that
> /oldusr is on /usr and /usr is on /vault.
	Yes this will work but the Red Hat installer doesn't read 
/etc/fstab of your old system. So it's not aware of what you did. That 
is why you, as a rule do not want to do what you did.

	If a partition gets full root will get mail warning you and you 
can take action. What I would do is get another larger hard drive or 
another hard drive and move /usr or /home to the new hard drive. That 
should solve the problem and the Red Hat installer will see it.

> I can't seem to find any good documentation on how labels work, where
> the data is kept (in a file, in the partition table, in the aether?)
> and how it is modified.
> Meanwhile the system complains about there not being enough space on
> /var but a df shows it to only be 15% full.
> /dev/hda6              3162420   2473856    527916  83% /oldusr
> /dev/hda5              3162420    430664   2571108  15% /var
> /dev/hda10             7906164   3540208   3964336  48% /var/www
> /dev/hda11            23719032   6107248  16406912  28% /usr
> /dev/hda12            21607920  15399224   5111060  76% /vault2
> Can someone please point me to some decent documentation about how
> labels, /etc/fstab and any other files or programs work?
> Thanks
>   Larry

               - Karl Larsen k5di Las Cruces,NM Az ScQRPions -

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