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<H1>[Mageia-dev] time to switch from raw partitions to lvm?</H1>
<B>Buchan Milne</B>
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TITLE="[Mageia-dev] time to switch from raw partitions to lvm?">bgmilne at staff.telkomsa.net
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<I>Tue Feb 22 09:07:18 CET 2011</I>
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<PRE>
----- "Wolfgang Bornath" <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">molch.b at googlemail.com</A>> wrote:
><i> 2011/2/21 Buchan Milne <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">bgmilne at staff.telkomsa.net</A>>:
</I>><i> > On Monday, 21 February 2011 11:49:27 Thomas Lottmann wrote:
</I>><i> >> I am still not convinced of how easy this can be. For having
</I>><i> attempted
</I>><i> >> to manage (and learn) how to manage LVM partitons with CentOS, it
</I>><i> is
</I>><i> >> quite complicated. So it certainly has many advantages, but I'm
</I>><i> awaiting
</I>><i> >> an intuitive disk manager like Diskdrake to manage this stuff
</I>><i> without
</I>><i> >> the need of preliminary knowledge.
</I>><i> >
</I>><i> > Yes, with diskdrake, it's no problem. Anaconda's LVM interface is
</I>><i> quite
</I>><i> > confusing and complex. After installation, AFAIK, you can't access
</I>><i> the same
</I>><i> > interface. system-config-lvm (if it's still around) was also pretty
</I>><i> unusable.
</I>><i> >
</I>><i> > But, we have diskdrake, so why are the problems of CentOS an issue?
</I>><i>
</I>><i> Because (as I remarked earlier) there are people who have other Linux
</I>><i> flavors on their harddisk before they try Mageia - what if they do
</I>><i> their partitioning with those (i.e. CentOS)?
</I>
Irrelevant. If there is free space, you can use LVM or not. Note CentOS defaults to LVM as of 5.x. If the whole disk is partitioned as a PV (likely with CentOS), then you will be forced to use LVM anyway ...
><i> Again, people do not work all the same.
</I>
Irrelevant. If this was the case, we would *FORCE* everyone to use LVM, or a large single root filesystem, or a complex layout, or something else. But we aren't discussing forcing of anything, just what the *default* option should be.
><i> There are people who do their
</I>><i> partitioning with 3rd-party apps like gparted or others.
</I>
Then they should not use the default, if they think they know better.
><i> There are
</I>><i> people who like to have a bootloader in the root partition of each
</I>><i> Linux they install (using chainloader in the first Linux' grub), etc.
</I>
Shame, IMHO putting bootloader in root partition is a bad idea. But, they can still do this. They can even install a bootloader in the boot partition of each distro, and use chainloader (which is what I do). No one is proposing preventing them from doing this.
><i> IMHO it is a bad idea to make LVM default, because there are too many
</I>><i> cases around where people would not want LVM.
</I>
IMHO, the majority of users *should* use LVM. The 10% who have specific reasons not to, will of course still be able to use normal partitions. The problem currently is that I suspect 90% of the users who should be using LVM, don't. Then, they need assistance from others to resize their /, or /home, or another filesystem that they sized incorrectly during installation.
Users shouldn't need to "learn to partition", or "practice installing", by doing installations over and over until they figure out that / should be at least 10GB, but most likely not larger than 30GB, depending on whether they compile a lot (e.g. build packages or not).
Is this really user-friendly? By this I mean, friendly to users who *haven't* used Linux before, not those who are installing their 10th distro on the same machine for the 15th time.
><i> LVM as an option is a
</I>><i> far better solution and let the user decide what he wants.
</I>
The user will still *always* be able to decide what he wants. The question is, what to do for users who don't know what to decide. IMHO, for a first time user, it is *much* better to give them a "Use available space, with growable filesystems" or similar, than a statically partitioned, based on difficult-to-get-right heuristics.
Regards,
Buchan
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