Re: [MLUG] repartitioning in Linux

[Michael <EMAIL:PROTECTED>]

Mike Miller wrote:
> Is it impossible to change a filesystem in Linux after the drive has been
> partitioned?  For example, is it possible to change the sizes of /usr,
> /var, /tmp, etc., if those were all separate partitions when Linux was
> installed?  (I mean without backing up to tape, repartitioning the drive,
> and reinstalling the files.)  I would think there might be software to
> allow this, but is there any such software?

You might look at Parted. It's something of an opensource Partition 
Magic type of program.

> I'm asking because we are in the process of getting Linux running
> satisfactorily on our first fairly-big Linux server and one of our IT guys
> sent me this:
> 
>   One big difference that we can see already between Red Hat and the Tru64
>   Unix that we are running is that Tru64 has an optional file system
>   called the Advanced File System that allows disk volumes to be altered
>   while still full of data.  For example, on one Tru64 system we needed to
>   expand the size of the disk partition that is being used to store data.
>   We did not just want a second partition, since the added space was
>   needed because the files involved are huge (several gigabytes each) the
>   ideal solution was to grow he existing data partition.  With AdvFS we
>   can add another raid set to the raid controller, and then instruct AdvFS
>   to include that volume in with the ones that currently make up the data
>   partition.  Without even shutting down, much less backing up and
>   restoring, we can add space to an existing partition. Very slick.
> 
> My experience of Solaris was that you couldn't change the disk partition,
> so I wouldn't be surprised if Linux works that way too, but it would be
> nice to be able to tell these guys that Linux can do a little more than
> they knew!
> 
> Thanks in advance.

You have LVM. It lets you make multiple disks to act as a single disk 
and gives you more flexibility with adjustments.

-- 
Peace, Love, Linux

Michael <EMAIL:PROTECTED>
http://kavlon.org

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