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Old 01-28-2009, 10:10 AM   #1
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Partitioned a disk, but I have a question

I recently added a 40GB HD to my Ubuntu server, and successfully partitioned it with ext3. It comes up as 40GB media, which is OK, but I thought that I had read there was a way to make additional disk space transparent. What I mean is that rather than having 3 drives like you do in Windows with C: D: E: or in Linux 40GB media, 60GB media, etc., I'd like to have the system see all drives as a "whole". So if I add more music files to my music folder, if it runs out of space on one drive it simply adds it to another, but to me it simply is the Music folder.

Is this a RAID configuration, or is there another way?
Old 01-28-2009, 10:55 AM   #2
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There are various ways to do it:

1) Setup a RAID concatenated configuration using entire drives. This will present all your disks as a single whole called a meta disk which can be partitioned. This would require reinstalling as it would overwrite what you have on your original disk.

2) Setup LVM configuration using entire drives (better IMO). This will present all your disks into single whole called a Volume Group which can then be subdivided into individual Logical Volumes (which can be thought of as logical partions). This too would require reinstalling.

3) Do either RAID or LVM configuration using only partitions from your physical drives. This would avoid needing to reload. However, it assumes your original disk is partitioned for separate filesystems already. It would take more effort because you'd need to save off whatever was on the partitions before doing it as those partitions would be overwritten.


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