Re: [MLUG] repartitioning in Linux

[Jason McIntosh <EMAIL:PROTECTED>]

Yeah, definitely look at LVM.  We're using it, and it's pretty bloody 
reliable.  A bit tricky to get working, but you can expand partitions 
then to make more use of free space or other drives.  You create an LVM 
partition, and then LVM "drives" in the partition which are your 
filesystems.  Then, you can later add more drives, add them to the LVM 
group, and expand your partitions or decrease them as need be.
Cheers!
Jason

Jason McIntosh
Programmer/Analyst
University of Missouri
573-884-3865
GnuPG Key: http://poetshome.com/pubkey.asc
On Thursday, July 31, 2003, at 9:53 PM, Michael wrote:

> 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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