Lou, I'm new to this list and have not posted here before, so I am not sure if this is the advice you'd eventually get, but it seems like you should focus on the basics. You will need to understand the individual components before a the more task-oriented parts of a how-to will be of use. Following a step-by-step guide will get you a result, but if you don't understand the steps the result probably won't be of any use to you. The how-to has a good breakdown of the anatomy of LVM; that might be the best place to start, focusing on the differences between Physical Volumes, Volume Groups, Logical Volumes and where in that arrangement a filesystem is placed. Lou Arnold wrote: > I read the How-To. It doesn't talk about the specific case or being > mounted at root, so I had to experiment. It is likely that commands > were in the wrong order, but I don't know what the right order is. > > I have attached the terminal session I used. In the end it did not work. > There was still 66 GB free, and when I rebooted, the file system failed. > The superblock was too big. > > I obviously don't understand the difference between pvresize, lvreduce > and vgreduce, and how resize2fs is related to these commands. > > Hope you can help, > Lou. > > > On 10/21/09, *Drew* <drew.kay@gmail.com <mailto:drew.kay@gmail.com>> wrote: > > > The documentation wasn't specific. I believe the intent was simply to > > migrate the data to another logical volume to temporarily allow > the source > > volume to be reduced and/or removed. But let's assume that has > happened or > > that doesn't need to happen. So now we need to unmount LogVol00, > reduce it > > to its original nunber of extents and then remount it (either > before or > > after remount we remove the physical drive.) I assume you can't > try this or > > you'll screw up your computer, but I have a system that I screw up and > > easily restore from a OS image. So no need to be too cautious. > > I've done this on several occasions. > > If you want to play with various scenarios in LVM, I'd recommend > reading the LVM How-To @ http://tldp.org/HOWTO/LVM-HOWTO/ . Sections > 11 & 13 cover the most common tasks you'll encounter in LVM. Play > around, don't be afraid to break things, and if you have questions > feel free to give the list a shout. > > > -- > Drew > > "Nothing in life is to be feared. It is only to be understood." > --Marie Curie > > > > ------------------------------------------------------------------------ > > _______________________________________________ > 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/ -- Ryan
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