Please read the warning at the end of this email ________________________________________________ > Hi, > Are you sure the clustered bit is set on the VG? > http://sources.redhat.com/cluster/wiki/FAQ/CLVM#clvmd_clustered > Bob Peterson > Red Hat File Systems Yes, the volume group was created with vgcreate -cy, and the output of vgs shows the "c" flag: - VG #PV #LV #SN Attr VSize VFree vg00 1 13 0 wz--n- 49.88G 27.16G vgGWPOCSHARED 1 8 0 wz--nc 199.98G 29.98G You can see below an example using vgs and lvs to show the issue: - Initial state: - [root@ybsxlx89 ~]# vgs ; lvs VG #PV #LV #SN Attr VSize VFree vg00 1 13 0 wz--n- 49.88G 27.16G vgGWPOCSHARED 1 10 0 wz--nc 199.98G 27.98G LV VG Attr LSize Origin Snap% Move Log Copy% Convert esmlv vg00 -wi-ao 480.00M lvol1 vg00 -wi-ao 1.00G lvol2 vg00 -wi-ao 4.00G lvol3 vg00 -wi-ao 3.91G lvol4 vg00 -wi-ao 1.00G lvol5 vg00 -wi-ao 1.00G lvol6 vg00 -wi-ao 256.00M netbackuplv vg00 -wi-ao 512.00M oraclelv vg00 -wi-ao 5.00G tivolilv vg00 -wi-ao 64.00M u001lv vg00 -wi-ao 5.00G u003lv vg00 -wi-ao 512.00M ybslv vg00 -wi-ao 32.00M aserver vgGWPOCSHARED -wi-a- 10.00G fmw1 vgGWPOCSHARED -wi-a- 50.00G fmw2 vgGWPOCSHARED -wi-a- 50.00G gwpoc_cluster vgGWPOCSHARED -wi-a- 20.00G gwpoc_instance1 vgGWPOCSHARED -wi-a- 10.00G gwpoc_instance2 vgGWPOCSHARED -wi-a- 10.00G mserver1 vgGWPOCSHARED -wi-a- 10.00G mserver2 vgGWPOCSHARED -wi-a- 10.00G test vgGWPOCSHARED -wi-a- 1.00G test2 vgGWPOCSHARED -wi-a- 1.00G I next run "lvcreate -n test3 -L 1G vgGWPOCSHARED" on the other node, and then run the vgs and lvs command on this node again: - [root@ybsxlx89 ~]# vgs ; lvs VG #PV #LV #SN Attr VSize VFree vg00 1 13 0 wz--n- 49.88G 27.16G vgGWPOCSHARED 1 10 0 wz--nc 199.98G 27.98G LV VG Attr LSize Origin Snap% Move Log Copy% Convert esmlv vg00 -wi-ao 480.00M lvol1 vg00 -wi-ao 1.00G lvol2 vg00 -wi-ao 4.00G lvol3 vg00 -wi-ao 3.91G lvol4 vg00 -wi-ao 1.00G lvol5 vg00 -wi-ao 1.00G lvol6 vg00 -wi-ao 256.00M netbackuplv vg00 -wi-ao 512.00M oraclelv vg00 -wi-ao 5.00G tivolilv vg00 -wi-ao 64.00M u001lv vg00 -wi-ao 5.00G u003lv vg00 -wi-ao 512.00M ybslv vg00 -wi-ao 32.00M aserver vgGWPOCSHARED -wi-a- 10.00G fmw1 vgGWPOCSHARED -wi-a- 50.00G fmw2 vgGWPOCSHARED -wi-a- 50.00G gwpoc_cluster vgGWPOCSHARED -wi-a- 20.00G gwpoc_instance1 vgGWPOCSHARED -wi-a- 10.00G gwpoc_instance2 vgGWPOCSHARED -wi-a- 10.00G mserver1 vgGWPOCSHARED -wi-a- 10.00G mserver2 vgGWPOCSHARED -wi-a- 10.00G test vgGWPOCSHARED -wi-a- 1.00G test2 vgGWPOCSHARED -wi-a- 1.00G test3 has not appeared, despite being visible in the other node on which it was created. So I stop and start clvmd (no gfs2 filesystems mounted): - [root@ybsxlx89 ~]# service clvmd stop Deactivating clustered VG(s): 0 logical volume(s) in volume group "vgGWPOCSHARED" now active [ OK ] Signaling clvmd to exit [ OK ] clvmd terminated [ OK ] [root@ybsxlx89 ~]# service clvmd start Starting clvmd: Activating VG(s): 11 logical volume(s) in volume group "vgGWPOCSHARED" now active 13 logical volume(s) in volume group "vg00" now active [ OK ] Now the test3 LV appears: - [root@ybsxlx89 ~]# vgs ; lvs VG #PV #LV #SN Attr VSize VFree vg00 1 13 0 wz--n- 49.88G 27.16G vgGWPOCSHARED 1 11 0 wz--nc 199.98G 26.98G LV VG Attr LSize Origin Snap% Move Log Copy% Convert esmlv vg00 -wi-ao 480.00M lvol1 vg00 -wi-ao 1.00G lvol2 vg00 -wi-ao 4.00G lvol3 vg00 -wi-ao 3.91G lvol4 vg00 -wi-ao 1.00G lvol5 vg00 -wi-ao 1.00G lvol6 vg00 -wi-ao 256.00M netbackuplv vg00 -wi-ao 512.00M oraclelv vg00 -wi-ao 5.00G tivolilv vg00 -wi-ao 64.00M u001lv vg00 -wi-ao 5.00G u003lv vg00 -wi-ao 512.00M ybslv vg00 -wi-ao 32.00M aserver vgGWPOCSHARED -wi-a- 10.00G fmw1 vgGWPOCSHARED -wi-a- 50.00G fmw2 vgGWPOCSHARED -wi-a- 50.00G gwpoc_cluster vgGWPOCSHARED -wi-a- 20.00G gwpoc_instance1 vgGWPOCSHARED -wi-a- 10.00G gwpoc_instance2 vgGWPOCSHARED -wi-a- 10.00G mserver1 vgGWPOCSHARED -wi-a- 10.00G mserver2 vgGWPOCSHARED -wi-a- 10.00G test vgGWPOCSHARED -wi-a- 1.00G test2 vgGWPOCSHARED -wi-a- 1.00G test3 vgGWPOCSHARED -wi-a- 1.00G It is interesting that if I do an lvcreate on one node, then ls -l /dev/mapper/vgGWPOCSHARED* on the other node, the device mapper entry has been created, and I can therefore use it in filesystems etc. It seems restricted to the lvm specific commands. Simon ________________________________________________ This email and any attachments are confidential and may contain privileged information. If you are not the person for whom they are intended please return the email and then delete all material from any computer. You must not use the email or attachments for any purpose, nor disclose its contents to anyone other than the intended recipient. Any statements made by an individual in this email do not necessarily reflect the views of the Yorkshire Building Society Group. ________________________________________________ Yorkshire Building Society, which is authorised and regulated by the Financial Services Authority, chooses to introduce its customers to Legal & General for the purposes of advising on and arranging life assurance and investment products bearing Legal & Generalâs name. 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