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There was a bad sequence: *) Make changes to LV layout to split images (e.g. 4-way -> 2-way/2-way) 1) vg_write, suspend_lv(original_mirror), vg_commit 2) activate_lv(newly_split_lv) 3) resume_lv(original_mirror) Step #2 is not allowed. However, without it, the resume of the original mirror will also resume its former sub-LVs - making it impossible to activate the newly split LV due to the changes in layering, pointers, and names that had already been made. Additionally, the resume or the original brings the sub-lv's online with names that differ from the metadata on disk - also a no-no. Thus, the split must be done in stages such that the active LVs always reflect what is in the committed LVM metadata. First, alter the original mirror by releasing the images. The images are made visible and independent as an intermediate stage. (This way, we can have consistency between LVM metadata and active LVs.) The second stage collects the recently split LVs, deactivates them, forms them into a mirror if necessary, and then activates them. It is a bit of a circuitous method, but it is the only way to split a mirror from a mirror and obey these general rules: 1) Never [de]activate sub-lvs when the top-level LV is suspended 2) Avoid having active LVs that differ from the description in the LVM metadata Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>
This tree contains the LVM2 and device-mapper tools and libraries. For more information about LVM2 read the changelog in the WHATS_NEW file. Installation instructions are in INSTALL. There is no warranty - see COPYING and COPYING.LIB. Tarballs are available from: ftp://sources.redhat.com/pub/lvm2/ To access the CVS tree use: cvs -d :pserver:cvs@sources.redhat.com:/cvs/lvm2 login CVS password: cvs cvs -d :pserver:cvs@sources.redhat.com:/cvs/lvm2 co LVM2 Mailing list for general discussion related to LVM2: linux-lvm@redhat.com Subscribe from https://www.redhat.com/mailman/listinfo/linux-lvm Mailing list for LVM2 development, patches and commits: lvm-devel@redhat.com Subscribe from https://www.redhat.com/mailman/listinfo/linux-lvm Mailing list for device-mapper development, including kernel patches and multipath-tools: dm-devel@redhat.com Subscribe from https://www.redhat.com/mailman/listinfo/dm-devel