Where is lvm metadata stored

Note if there are multiple physical volumes in the volume group, be sure to extract all metadata from as mappings may result in blocks being cross-referenced. To lookup a logical address, first determine which logical volume segment range the address falls into. Segments boundries are specified via extents whose size is given in the volume group metadata note this is represnted in sectors, or byte blocks.

To implement this each thin logical volume references a pool volume which in return references metadata and data volumes as can be seen above. Addresses to be accessed from the thin volume are first processed using the pool metadata volume which contains an on disk BTree structure mapping thin volume blocks to data volume blocks.

One of the sections will look like below:. Suppose I have machine with 2 disks configured into a logical volume can I just take those disks out the machine and put them in another machine and expect that the logical volume will work in the new machine? You can migrate Volume Groups to another host. Though its not exactly plug-and-play, the procedure to do this is pretty straight-forward.

But post-reboot what I saw was really surprising. I doubt if this can be trusted in PROD environment. Are they still attached to the node?

Can you paste the output of lsblk command. I have had the same problem. By mistake the lvm and pv was gone. The system was always entering in Ctrl D prompt.

Restored with this method here. Save my name and email in this browser for the next time I comment. Notify me via e-mail if anyone answers my comment. Table of Contents. Still installing Linux manually? WARNING: Execute this command wisely and is not recommended to be executed in production environments as it will delete all the file system signature of the device.

You must perform proper pre-checks and take backup of your file system before executing these steps in production environment to prevent any data loss. Related Posts. Didn't find what you were looking for? Perform a quick search across GoLinuxCloud Search for:. Thank You for your support!!