Hi all,
Nowadays it's difficult to create raid1 LVs, or converting linear LVs
to raid1. If I try hard, once it succeeds, but it's not supposed to
work like this. I'm on Ubuntu Vivid. I've never experienced this
before, but I didn't create much raid1 LVs before I added plus PVs.
But I don't remember ever having this problem, so whatever it is,
probably it's introduced with Vivid.
Case 1: Creating raid1 LV
root@vmhost:~# lvcreate --verbose --type raid1 --mirrors 1 --extents 1
--name testlv vmhost-vg
DEGRADED MODE. Incomplete RAID LVs will be processed.
Setting logging type to disk
Finding volume group "vmhost-vg"
Archiving volume group "vmhost-vg" metadata (seqno 112).
Creating logical volume testlv
Creating logical volume testlv_rimage_0
Creating logical volume testlv_rmeta_0
Creating logical volume testlv_rimage_1
Creating logical volume testlv_rmeta_1
activation/volume_list configuration setting not defined: Checking
only host tags for vmhost-vg/testlv_rmeta_0
Creating vmhost--vg-testlv_rmeta_0
Loading vmhost--vg-testlv_rmeta_0 table (252:122)
Resuming vmhost--vg-testlv_rmeta_0 (252:122)
Clearing metadata area of vmhost-vg/testlv_rmeta_0
Initializing 512 B of logical volume "vmhost-vg/testlv_rmeta_0"
with value 0.
Removing vmhost--vg-testlv_rmeta_0 (252:122)
activation/volume_list configuration setting not defined: Checking
only host tags for vmhost-vg/testlv_rmeta_1
Creating vmhost--vg-testlv_rmeta_1
Loading vmhost--vg-testlv_rmeta_1 table (252:122)
Resuming vmhost--vg-testlv_rmeta_1 (252:122)
Clearing metadata area of vmhost-vg/testlv_rmeta_1
Initializing 512 B of logical volume "vmhost-vg/testlv_rmeta_1"
with value 0.
Removing vmhost--vg-testlv_rmeta_1 (252:122)
Creating volume group backup "/etc/lvm/backup/vmhost-vg" (seqno 114).
Activating logical volume "testlv" exclusively.
activation/volume_list configuration setting not defined: Checking
only host tags for vmhost-vg/testlv
Creating vmhost--vg-testlv_rmeta_0
Loading vmhost--vg-testlv_rmeta_0 table (252:122)
Resuming vmhost--vg-testlv_rmeta_0 (252:122)
Creating vmhost--vg-testlv_rimage_0
Loading vmhost--vg-testlv_rimage_0 table (252:123)
Resuming vmhost--vg-testlv_rimage_0 (252:123)
Creating vmhost--vg-testlv_rmeta_1
Loading vmhost--vg-testlv_rmeta_1 table (252:124)
Resuming vmhost--vg-testlv_rmeta_1 (252:124)
Creating vmhost--vg-testlv_rimage_1
Loading vmhost--vg-testlv_rimage_1 table (252:125)
Resuming vmhost--vg-testlv_rimage_1 (252:125)
Creating vmhost--vg-testlv
Loading vmhost--vg-testlv table (252:126)
device-mapper: reload ioctl on failed: Device or resource busy
Removing vmhost--vg-testlv (252:126)
Failed to activate new LV.
Creating volume group backup "/etc/lvm/backup/vmhost-vg" (seqno 115).
Result: nothing is actually created according to "lvs -a".
Case 2: Create linear LV and then convert it to raid1
root@vmhost:~# lvcreate --verbose --extents 1 --name testlv vmhost-vg
DEGRADED MODE. Incomplete RAID LVs will be processed.
Setting logging type to disk
Finding volume group "vmhost-vg"
Archiving volume group "vmhost-vg" metadata (seqno 115).
Creating logical volume testlv
Creating volume group backup "/etc/lvm/backup/vmhost-vg" (seqno 116).
Activating logical volume "testlv".
activation/volume_list configuration setting not defined: Checking
only host tags for vmhost-vg/testlv
Creating vmhost--vg-testlv
Loading vmhost--vg-testlv table (252:126)
Resuming vmhost--vg-testlv (252:126)
Wiping known signatures on logical volume "vmhost-vg/testlv"
Initializing 4.00 KiB of logical volume "vmhost-vg/testlv" with value 0.
Creating volume group backup "/etc/lvm/backup/vmhost-vg" (seqno 116).
Logical volume "testlv" created
root@vmhost:~# lvs -a | grep testlv
testlv vmhost-vg -wi-a----- 4.00m
root@vmhost:~# lvconvert --verbose --type raid1 --mirrors 1 vmhost-vg/testlv
DEGRADED MODE. Incomplete RAID LVs will be processed.
Archiving volume group "vmhost-vg" metadata (seqno 116).
Creating logical volume testlv_rmeta_0
Creating logical volume testlv_rmeta_1
Creating logical volume testlv_rimage_0
activation/volume_list configuration setting not defined: Checking
only host tags for vmhost-vg/testlv_rmeta_0
Creating vmhost--vg-testlv_rmeta_0
device-mapper: create ioctl on vmhost--vg-testlv_rmeta_0 failed:
Device or resource busy
Failed to activate localy testlv_rmeta_0 for clearing
root@vmhost:~# lvs -a | grep testlv
testlv vmhost-vg -wi-a----- 4.00m
testlv_rimage_1 vmhost-vg -wi------- 4.00m
testlv_rmeta_0 vmhost-vg -wi------- 4.00m
testlv_rmeta_1 vmhost-vg -wi------- 4.00m
Result: mirror and meta LVs are created as distinct linear LVs and are
not bound together to form a raid1 LV.
_______________________________________________
linux-lvm mailing list
linux-lvm@redhat.com
https://www.redhat.com/mailman/listinfo/linux-lvm
read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
