[Nottingham] Mount and Filesystem

[NLUG]

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

ohh i see. The content wouldn't be lost then?

> 
> 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

Thanks a lot. Very concise.

> 
> 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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> 
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