2013/7/2 Alessandro MACUZ <<a href="mailto:alessandro.macuz@gmail.com" target="_blank">alessandro.macuz@gmail.com</a>> <div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> <div>The process here below is self-explanatory of what happens. Starting with one volume (on /dev/sda1) I'd like to mirror it on /dev/sdb1 and having the mirror_log mirrored as well. Though I think there is plenty of PE I get the error message Insufficient suitable allocatable extents for logical volume : 1536 more required Unable to allocate extents for mirror(s). I mean the mirror_log is one PE, i.e. 4 Megabytes... Why "lvconvert -i 5 -m1 --mirrorlog mirrored /dev/lvgrptstnlvm/root /dev/sdb1" doesn't work whereas "lvconvert -m1 /dev/lvgrptstnlvm/root /dev/sdb1" does? The space to be allocated differs by just one PE. I'm using Knoppix to fix a system due to other problems, I have noticed there was a (human) design problem with LVM and I want to achieve the goal of one volume mirrored in 2 parts and 2 mirrors logs each on one disk. Thanks, Alex ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ root@Microknoppix:/home/knoppix# lvs -a -o +devices,lv_size LV VG Attr LSize Pool Origin Data% Move Log Copy% Convert Devices LSize root lvgrptstnlvm mwi-aom- 6.00g root_mlog 100.00 root_mimage_0(0),root_mimage_1(0) 6.00g [root_mimage_0] lvgrptstnlvm iwi-aom- 6.00g /dev/sda1(0) 6.00g [root_mimage_1] lvgrptstnlvm iwi-aom- 6.00g /dev/sdb1(0) 6.00g [root_mlog] lvgrptstnlvm lwi-aom- 4.00m /dev/sdb1(1536) 4.00m root@Microknoppix:/home/knoppix# pvs -v -o +pv_pe_count,pv_pe_alloc_count Scanning for physical volume names PV VG Fmt Attr PSize PFree DevSize PV UUID PE Alloc /dev/sda1 lvgrptstnlvm lvm2 a-- 9.00g 3.00g 9.00g 5h4peZ-7SVd-MKrH-IQNJ-UACQ-mM7Q-6CVeo5 2303 1536 /dev/sdb1 lvgrptstnlvm lvm2 a-- 7.07g 1.06g 9.00g VlGEw0-JaqC-THbz-G4mv-yHq5-9Y80-N5ANNQ 1809 1537 root@Microknoppix:/home/knoppix# lvs -a -o +devices,lv_size LV VG Attr LSize Pool Origin Data% Move Log Copy% Convert Devices LSize root lvgrptstnlvm mwi-aom- 6.00g root_mlog 100.00 root_mimage_0(0),root_mimage_1(0) 6.00g [root_mimage_0] lvgrptstnlvm iwi-aom- 6.00g /dev/sda1(0) 6.00g [root_mimage_1] lvgrptstnlvm iwi-aom- 6.00g /dev/sdb1(0) 6.00g [root_mlog] lvgrptstnlvm lwi-aom- 4.00m /dev/sdb1(1536) 4.00m root@Microknoppix:/home/knoppix# lvconvert -m0 /dev/lvgrptstnlvm/root /dev/sdb1 /sbin/dmeventd: stat failed: No such file or directory Logical volume root converted. root@Microknoppix:/home/knoppix# lvconvert -i 5 -m1 --mirrorlog mirrored /dev/lvgrptstnlvm/root /dev/sdb1 Insufficient suitable allocatable extents for logical volume : 1536 more required Unable to allocate extents for mirror(s). root@Microknoppix:/home/knoppix# lvconvert -m1 /dev/lvgrptstnlvm/root /dev/sdb1 lvgrptstnlvm/root: Converted: 0.5%[...SKIP...] lvgrptstnlvm/root: Converted: 100.0% root@Microknoppix:/home/knoppix# lvs -a -o +devices,lv_size LV VG Attr LSize Pool Origin Data% Move Log Copy% Convert Devices LSize root lvgrptstnlvm mwi-aom- 6.00g root_mlog 100.00 root_mimage_0(0),root_mimage_1(0) 6.00g [root_mimage_0] lvgrptstnlvm iwi-aom- 6.00g /dev/sda1(0) 6.00g [root_mimage_1] lvgrptstnlvm iwi-aom- 6.00g /dev/sdb1(0) 6.00g [root_mlog] lvgrptstnlvm lwi-aom- 4.00m /dev/sdb1(1536) 4.00m root@Microknoppix:/home/knoppix# pvs -v -o +pv_pe_count,pv_pe_alloc_count Scanning for physical volume names PV VG Fmt Attr PSize PFree DevSize PV UUID PE Alloc /dev/sda1 lvgrptstnlvm lvm2 a-- 9.00g 3.00g 9.00g 5h4peZ-7SVd-MKrH-IQNJ-UACQ-mM7Q-6CVeo5 2303 1536 /dev/sdb1 lvgrptstnlvm lvm2 a-- 7.07g 1.06g 9.00g VlGEw0-JaqC-THbz-G4mv-yHq5-9Y80-N5ANNQ 1809 1537 root@Microknoppix:/home/knoppix#</div> </blockquote></div> <div> </div><div>Same result if done from a Debian LiveCD. If there are a lot of PEs why LVM complains it is not suitable, in my case it needs just 1 PE.</div><div> </div><div>I used --alloc anywherebut it noticed the two mirror-logs were on the same disk, thing that I don't want of course...</div>