Moving to linux-lvm list which is intended for lvm questions like these. See my answer bellow. On 04/01/2014 03:51 PM, Bernd Broermann wrote:
Hello , I try to migrate mirror an LogicalVolumes from one disk to the other. The disks are identical. /dev/emcpowerd 52313 myvg /dev/emcpowereh 52313 emcpowerd shows 512K unusable. rhel6.3# pvdisplay /dev/emcpowerd --- Physical volume --- PV Name /dev/emcpowerd VG Name myvg PV Size 51,09 GiB / not usable 512,00 KiB Allocatable yes (but full) PE Size 4,00 MiB Total PE 13078 Free PE 0 Allocated PE 13078 PV UUID GyMBL2-v84W-719F-069j-Mga6-6tSe-c9fP2D when extending ( even creating ) the VG, the new PV show one less PE and 4,5 MiB . rhel6.3# vgextend myvg /dev/emcpowereh rhel6.3# pvdisplay /dev/emcpowereh --- Physical volume --- PV Name /dev/emcpowereh VG Name myvg PV Size 51,09 GiB / not usable 4,50 MiB Allocatable yes PE Size 4,00 MiB Total PE 13077 Free PE 13077 Allocated PE 0 PV UUID p6VT4i-Q98Y-MbfP-WHFi-V01B-Ohcy-yRv83D So 13077 PE are less then 13878 PEs and mirroring fails. Note: the emcpower devices are SAN Devices and /dev/emcpowerd was created under RHEL5 How can I allocate the full disk ?
See what `pvs -oall` returns in `1st PE` column - there is more space allocated on RHEL6(.4) for metadata and this could causing the unallocated space you see...
You may use `--metadata` size when creating PV to change the metadata area size.
Another option is there are multiple metadata areas but this is not the default - see the `#PMda` column and the corresponding pvcreate option `--metadatacopies`.
Regards, -- Marian
Thank you Bernd Linux rhel6.3 2.6.32-279.11.1.el6.x86_64 #1 SMP Sat Sep 22 07:10:26 EDT 2012 x86_64 x86_64 x86_64 GNU/Linux lvm2-2.02.95-10.el6.x86_64 -- lvm-devel mailing list lvm-devel@redhat.com https://www.redhat.com/mailman/listinfo/lvm-devel
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