[Nottingham] Mount and Filesystem

[godfrey]

Hi,

Simple answer is that the currently visible /var (and all its contents) 
becomes 'invisible' - until such time as you unmount /dev/sdb1.

Note that mounting like this will cause grave problems to any program that may 
have files open on /var.

Your method is -
1 - shut down into single user mode, and make sure nothing is using /var
2 - mount /dev/sdb1 to other location like /newdisk
3 copy /var contents to /newdisk
4 edit /etc/fstab (or equivalent) to mount /dev/sdb1 as /var
5 reboot the computer
result - you get a 100Gb /var

Regards,

Godfrey

On Tuesday 25 September 2007 6:25 pm, NLUG wrote:
> Hey guys,
>
> I have a couple of questions for you.
> Let's say you have a 30GB partition /var on disk 1 (/dev/sda1).
> We also have a 100GB disk 2 which is one big /dev/sdb1 partition.
> The 30GB /var is nearly full...if i mount /dev/sdb1 to /var, what happens?
>
> Do i get a 130GB partition?
> if an application keeps adding stuff to /var, where is the data written
> to ? does it fill up /dev/sda1 first and then carries on to /dev/sdb1?
> Or more simply, can you not mount a partition onto an already mounted
> partition ?
>
> i'm intrigued :-)
> Thanks in advance.
>
> Raph
>
>
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