Hello David,

thanks for the response. I did exactly what you suggested with RAID 1 
and LVM them together to create a large drive. It was fairly easy to 
accomplish with Ubuntu's installer.

However, Les Stott brings up a great point about RAID 5. I would like 
recovering from a failure to be possible. How I have it now makes it 
possible, but perhaps it isn't as easy as the RAID 5 option. I also like 
that RAID 5 gives me more space.

I think that I'll have the time to experiment with setting both of them up.

thanks for taking the time to respond!

-Matthew



David Nalley wrote:
> Hi Matthew, 
> 
> I don't think the concern is so much that a client computer's drive and one 
> of 
> your backuppc  box's drive would fail at the same instant, but rather what 
> the cost of one drive in the backuppc box's drive would be. 
> Loosing a single drive if you pool them all together with LVM means you loose 
> the entire logical volume, which means you have to start all backups over 
> again from scratch. That's too much of a waste of resources to me 
> (particularly if you are using rsync.) but that is just my perspective, it 
> may be perfectly acceptable in your environment, and is a decision you have 
> to make. 
> 
> If you go the RAID 1 option, I'd create two RAID 1 arrays and LVM them 
> together, or perhaps look at the RAID 10/0+1 option and put all 4 drives in 
> the same array. I still think that I would use LVM since it gives you some 
> flexibility in the future. Red Hat's new LVM guide is pretty decent, gives 
> lots of real world examples, you may want to check it out as well. 
> 
> Hope this helps, 
> 
> David Nalley
> 
> 
> 
> 
> On Tuesday 04 December 2007 14:40:16 Matthew Metzger wrote:
>> Hello,
>>
>> I am building a server for BackupPC and I have a few questions
>> concerning what is the best way to set up storage.
>>
>> I have one 80 GB IDE hard disk that will hold the operating system
>> (ubuntu server), /boot, swap, et cetera.
>>
>> I also have four 500 GB IDE hard disks. I'm wondering what you would
>> advise for the best way to configure them. I'm tempted to put them all
>> in one lvm volume so that I can have 2 TB of storage. This is also the
>> easiest for me to accomplish.
>>
>> I've heard some people say that RAID 1 should be used to create
>> redundancy within the server. How important is this? The probability
>> that a client computer's drive would fail at the same time as a drive in
>> the BackupPC server is small.
>>
>> What is the best way to set up RAID 1 with lvm over four disks (if that
>> is the recommended configuration)?
>>
>> I have read
>> http://www.linuxdevcenter.com/pub/a/linux/2006/04/27/managing-disk-space-wi
>> th-lvm.html
>>
>> thanks for your time and I appreciate any responses.
>>
>> -Matthew
>>


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