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--- linux:linux_lvm [2023/06/19 13:47]
manu [LVM import same VGname]
+++ linux:linux_lvm [2025/05/21 11:55] (current)
manu [LVM import same VGname]
@@ Line 8: / Line 8: @@
 http://www.voleg.info/linux-mirror-system-disk.html
+===== Disk cloning RHEL9 =====
+For RHEL9 and higher
+After booting on a clone, the server will start in single mode user. No pv or vg is visible
+You have to update the file /etc/lvm/devices/system.devices to match the disk WWN
+<cli prompt='#'>
+[root@rhtest ~]# multipath -ll
+mpatha (36005076xxxxxxxxxxx000000000017b9) dm-0 IBM,2145
+size=60G features='1 queue_if_no_path' hwhandler='1 alua' wp=rw
+</cli>
+<cli prompt='#'>
+[root@rhtest ~]# cat /etc/lvm/devices/system.devices
+# LVM uses devices listed in this file.
+# Created by LVM command vgimportdevices pid 65293 at Wed May 21 10:23:35 2025
+HOSTNAME=rhtest
+VERSION=1.1.10
+IDTYPE=mpath_uuid IDNAME=part3-mpath-36005076xxxxxxxxxxx00000000001616 DEVNAME=/dev/mapper/mpatha3 PVID=JzZ6Nf4VUZFbBcNle1TX9miPydVISnYT
+</cli>
+Also update the multipathing binding if you want to change order
+<cli prompt='#'>
+[root@rhtest ~]# cat /etc/multipath/bindings
+# Multipath bindings, Version : 1.0
+# NOTE: this file is automatically maintained by the multipath program.
+# You should not need to edit this file in normal circumstances.
+#
+# Format:
+# alias wwid
+#
+mpatha 36005076xxxxxxxxxxx00000000001616
+mpathb 36005076xxxxxxxxxxx000000000017b9
+</cli>
+After updating all files, import VG devices.
+  * to import all pv, vg (will only add the multipath map): vgimportdevices -a
+  * If only some of the disks contain PV’s (for each to be used device) to be used by this system run: lvmdevices --adddev [device name]
+  For example: lvmdevices --adddev /dev/mapper/mpathc
+Now reboot. Everything is OK
+  * By default in a newly installed RHEL9 system LVM2 will use the /etc/lvm/devices/system.devices file to identify which disks are PV’s for this install. The /etc/lvm/lvm.conf filters are ignored. As the imported PV’s are not in this file LVM will not work with them.
+  * If a RHEL8 system is upgraded to RHEL9 the /etc/lvm/devices/system.devices file does not exists LVM will run as if use_devicesfile = 0 is set and use the /etc/lvm/lvm.conf filters.
+  * If the /etc/lvm/lvm.conf use_devicesfile parameter is set to 0. The /etc/lvm/devices/system.devices will not be used and the /etc/lvm/lvm.conf filters are used.
 ===== LVM import same VGname =====
@@ Line 49: / Line 101: @@
 </cli>
-check filesystem type
+Check filesystem type
-<cli prompt='#'>
-[root@rhtest ~]# mount -t xfs /dev/mapper/vg02-root /mnt3
-mount: /mnt3: wrong fs type, bad option, bad superblock on /dev/mapper/vg02-root, missing codepage or helper program, or other error.
-[root@rhtest ~]# mount -o nouuid /dev/mapper/vg02-root /mnt3
-</cli>
-If error to mount, I've first done a : xfs_repair -L <LV>
 <cli prompt='#'>
 [root@rhtest ~]# lsblk -o FSTYPE,MOUNTPOINT,NAME /dev/sdd
@@ Line 66: / Line 111: @@
 xfs         /            ├─rhel_redhattest1-root
 swap        [SWAP]       └─rhel_redhattest1-swap
+</cli>
+Check the filesystem using xfs_repair for xfs and fsck for ext4
+<cli prompt='#'>
+[root@rhtest ~]# xfs_repair -v /dev/mapper/vg01-rhel_redhat--data
+Phase 1 - find and verify superblock...
+        - block cache size set to 369264 entries
+Phase 2 - using internal log
+        - zero log...
+zero_log: head block 25428 tail block 25424
+ERROR: The filesystem has valuable metadata changes in a log which needs to
+be replayed.  Mount the filesystem to replay the log, and unmount it before
+re-running xfs_repair.  If you are unable to mount the filesystem, then use
+the -L option to destroy the log and attempt a repair.
+Note that destroying the log may cause corruption -- please attempt a mount
+of the filesystem before doing this.
+</cli>
+If error to mount, I've first done a : xfs_repair -L <LV>
+Mount the filesystem
+<cli prompt='#'>
+[root@rhtest ~]# mount -t xfs /dev/mapper/vg02-root /mnt3
+mount: /mnt3: wrong fs type, bad option, bad superblock on /dev/mapper/vg02-root, missing codepage or helper program, or other error.
+[root@rhtest ~]# mount -o nouuid /dev/mapper/vg02-root /mnt3
 </cli>
@@ Line 444: / Line 515: @@
 /dev/libraryvg/vmlv                        /virtual_vm    ext4   defaults                      0  2
 </cli>
+===== list PVID / VGID =====
+the PVID and VGID of disk
 ===== Errors on LVM =====

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