On Sat, 2011-03-05 at 15:13 +1300, Scott Arthur wrote: > I've been playing around on a test system with a similar partition > table. > > > Have successfully resized 2 to fill the disk extent. Partition 5 > however proves to be problematic. > > > Using fdisk, I tried deleting 2 and 5 and recreating based on sectors, > but couldn't recreate 5 on the same starting sector, it told me I was > out of bounds. Perhaps there's a (hidden) problem with partition 2 as well: it should also start on the same sector as it did before deleting/re-creating. Otherwise it would "push" the beginning of partition 5 by a bunch of sectors. > I then tried the same thing with fdisk but with cylinders instead and > both partitions were recreated okay, but destroyed all my LVM stuff. It's exactly like Milan Broz said in his earlier post: if the partition doesn't start at exactly the same location (sector) as it did before, LVM won't find its metadata at the expected location, thus rendering the volume unusable. > I can happily resize 2 using parted but parted wont resize 5. > > > Should I expect to be able to resize 5, or am I missing the point. > Should I simply be creating a partition 6 to fill the additional space > opened up by the resizing of partition 2? Yup, you should create partition 6 to fill the remaining space, then make it a physical volume and add it to the volume group. At least this is what I had in mind when I made the other post. Someone else also suggested simply extending the physical volume. I haven't done this, but I guess it is also worth looking into it. However, you should resize the partitions anyway (even if you use this approach). It's just that you would resize partition 5 instead of creating partition 6. > > On 4 March 2011 21:41, Radu Rendec <radu.rendec@mindbit.ro> wrote: > On Thu, 2011-03-03 at 15:18 -0500, Stuart D. Gathman wrote: > > On Thu, 3 Mar 2011, Scott Arthur wrote: > > > > > Partition Table: msdos > > > > > > Number Start End Size Type File system > Flags > > > 1 32.3kB 296MB 296MB primary ext4 > boot > > > 2 296MB 1000GB 1000GB extended > > > 5 296MB 1000GB 1000GB logical lvm > > > > > > I'm obviously wanting to expand the LVM partition to fill > the remaining 1TB > > > of space. > > > > > > Am I able to simply use parted to resize the partition > before doing a > > > pvresize etc? > > > > > > Or is it risky to resize the underlying LVM partition? > > > I wouldn't do that. Instead, I would create a new logical > partition, > "format" it as lvm physical volume and then extend the volume > group to > use this partition as well. > > I think this can be safely done like this: > > * turn off lvm; > * note down the exact starting and ending *sector* of > partition 5 (using > fdisk -lu) > * use fdisk and delete partition 5 and 2, then re-create > partition 2 up > to the full disk size > * re-create partition 5 making sure it's on exactly the same > starting > and ending sector as it was before > * create new partition 6 > > > You are getting to a size where msdos partition tables are > risky. > > Don't they crap out at 2TB? > > > They do. But the "2TB" disk is actually 2000GB, which is safe > (it takes > more than 2048GB to run into trouble with m$dos partitions). > > Best regards, > > Radu Rendec _______________________________________________ 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/
