Personally I like it when documentation is kept simple and uses simple examples. There is nothing worse than when you are trying to learn something and it tells you how to how to intantiate a variable, and then it immediately goes on to show you how to make some complicated reference to it using some code. I agree with you though, its probably a good idea to steer newcomers in the right direction on disk management and a few notes about doing LVM ontop of RAID being a good idea couldn't hurt. This is especially so since I've heard three mentions of people using LVM on a server without doing RAID this week alone. :-/ I suppose it could also be said that people who are causually doing LVM on their systems using something like a GUI are most likely not going to be referencing the man pages or LVM documentation until after their system is setup, at which point it is probably too late to put the physical volumes on a RAID array. So I think its more the responsibility of the GUI/ncurses installer to alert you to be using RAID. Mark On Tue, Sep 19, 2006 at 10:40:43PM GMT, Scott Lamb [slamb@slamb.org] said the following: > On Sep 18, 2006, at 12:37 PM, Mark Krenz wrote: > > LVM != RAID > > > > You should have been doing RAID if you wanted to be able to > >handle the > >failure of one drive. > > This is my biggest beef with LVM - why doesn't *any* of the > documentation point this out? There are very few good reasons to use > LVM without RAID, and "ignorance" certainly isn't among them. I don't > see any mention of RAID or disk failures in the manual pages or in > the HOWTO. > > For example, the recipes chapter [1] of the HOWTO shows a non-trivial > setup with four volume groups split across seven physical drives. > There's no mention of RAID. This is a ridiculously bad idea - if > *any* of those seven drives are lost, at least one volume group will > fail. In some cases, more than one. This document should be showing > best practices, and it's instead showing how to throw away your data. > > The "lvcreate" manual page is pretty bad, too. It mentions the > ability to tune stripe size, which on casual read, might suggest that > it uses real RAID. Instead, I think this is just RAID-0. > > [1] - http://tldp.org/HOWTO/LVM-HOWTO/recipeadddisk.html > > -- > Scott Lamb <http://www.slamb.org/> > > > _______________________________________________ > linux-lvm mailing list > linux-lvm@redhat.com > https://www.redhat.com/mailman/listinfo/linux-lvm > read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/ -- Mark S. Krenz IT Director Suso Technology Services, Inc. http://suso.org/ _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
