[linux-lvm] bug? shrink lv by specifying pv extent to be removed does not behave as expected
Roland <[email protected]>
| Newsgroups | dev.linux.lists.linux-lvm |
|---|---|
| Message-ID | <[email protected]> |
hi, we can extend a logical volume by arbitrary pv extends like this : root@s740:~# lvresize mytestVG/blocks_allocated -l +1 /dev/sdb:5 Size of logical volume mytestVG/blocks_allocated changed from 1.00 MiB (1 extents) to 2.00 MiB (2 extents). Logical volume mytestVG/blocks_allocated successfully resized. root@s740:~# lvresize mytestVG/blocks_allocated -l +1 /dev/sdb:10 Size of logical volume mytestVG/blocks_allocated changed from 2.00 MiB (2 extents) to 3.00 MiB (3 extents). Logical volume mytestVG/blocks_allocated successfully resized. root@s740:~# lvresize mytestVG/blocks_allocated -l +1 /dev/sdb:15 Size of logical volume mytestVG/blocks_allocated changed from 3.00 MiB (3 extents) to 4.00 MiB (4 extents). Logical volume mytestVG/blocks_allocated successfully resized. root@s740:~# lvresize mytestVG/blocks_allocated -l +1 /dev/sdb:20 Size of logical volume mytestVG/blocks_allocated changed from 4.00 MiB (4 extents) to 5.00 MiB (5 extents). Logical volume mytestVG/blocks_allocated successfully resized. root@s740:~# pvs --segments -olv_name,seg_start_pe,seg_size_pe,pvseg_start -O pvseg_start LV Start SSize Start blocks_allocated 0 1 0 0 4 1 blocks_allocated 1 1 5 0 4 6 blocks_allocated 2 1 10 0 4 11 blocks_allocated 3 1 15 0 4 16 blocks_allocated 4 1 20 0 476917 21 how can i do this in reverse ? when i specify the physical extend to be added, it works - but when is specifcy the physical extent to be removed, the last one is being removed but not the specified one. see here for example - i wanted to remove extent number 10 like i did add it, but instead extent number 20 is being removed root@s740:~# lvresize mytestVG/blocks_allocated -l -1 /dev/sdb:10 Ignoring PVs on command line when reducing. WARNING: Reducing active logical volume to 4.00 MiB. THIS MAY DESTROY YOUR DATA (filesystem etc.) Do you really want to reduce mytestVG/blocks_allocated? [y/n]: y Size of logical volume mytestVG/blocks_allocated changed from 5.00 MiB (5 extents) to 4.00 MiB (4 extents). Logical volume mytestVG/blocks_allocated successfully resized. root@s740:~# pvs --segments -olv_name,seg_start_pe,seg_size_pe,pvseg_start -O pvseg_start LV Start SSize Start blocks_allocated 0 1 0 0 4 1 blocks_allocated 1 1 5 0 4 6 blocks_allocated 2 1 10 0 4 11 blocks_allocated 3 1 15 0 476922 16 how can i remove extent number 10 ? is this a bug ? regards roland _______________________________________________ linux-lvm mailing list [email protected] https://listman.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/