David T-G said the following on 10/23/2013 11:24 AM:
Anton, et al --
...and then Anton Aylward said... % % David T-G said the following on 10/23/2013 06:59 AM: % >If that doesn't work out, I could fall back to partition labeling, % % Back to LVM. % use LVM and that's another problem that goes away.
Fine by me. Now I just need to learn about LVM. Got any good starter pointers? :-)
Oh, and one other question... Do I do my RAID via LVM, or other?
Learn more before you ask that question, as right now its clear a reply yes/no would make no sense. First, LVM can stripe and can do mirroring WITHOUT RAID. Second, putting LVM on top of, say RAID 5 implemented 'normally' can make it more manageable. We've mentioned that in the past - check the archives. But if I were you, I'd take a disk, use parted or whatever to create a good size (300M or so, plenty of headroom!) /boot partition and make the rst of the drive a LVM partition. The install in the LVM partition. Devote say 5G each to /var, /usr/share, /home, /tmp and / Even on a 250G drive(!) that gives tyou lots of free space to play with, but is more than enough to do an install. Then you can start playing around. You can use the LVM tools to add mirroring or striping to the second drive. My point is that you don't have to make all the detailed decisions up front. David, its very clear from this thread that you are massively over-analysing and over-designing the system. Stop micromanaging and Just Do It !
Whether or not to RAID seemed pretty moot these days, so I'm going to try that, but that then leads me to have to decide how to do so if I have some choice. Your idea of creating a fresh volume as needed to replace another was nice, but I don't have that kind of disk space :-) TC
*sigh* My point is that with LVM you can break the obsession that people seem to have before it of over optimizing disk layout. Just make enough to fit now, you can always grow it later ir shrink it if its too much. For a long while I ran my server on the 250G drive referred to above and as I said most of my partitions were 5G - most still are - even with a 60G partition for CD images I found that I usually had more than 50G unused/unallocated to do the kind of file system conversion or space to split a file system that I described. The idea that you have to allocate everything is not only an example of obsessive micromanagement and insistence of getting everything 100% optimized up front, but also allows no flexibility for changes in the future. "Resource Management" needs to be dynamic not constrained by past decisions and locked in place.
The best I could do would be to break the mirror, change one side, transfer the data, and remirror.
*THAT is why I'm suggesting using LVM LVM is not a file system! Its a disk space management system that underlies the file system. -- "Security can be viewed like a construction scenario - build part of a road, and even if and even if you don't complete it, you still have something to drive on; build part of a bridge and you have nothing! Security is like the last." -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org