Data recovery after moving BeeGFS metadata

[Vladimir Stegailov]

Hi!

The brief description of our problem is as follows:

During migration to new BeeGFS storage, we saved the metadata using “cp -a”. After we have moved the metadata back, we see the files, see their correct names and correct sizes. However, we cannot read the files.

We use two buddy mirroring groups on 2 NVMe disks in a single server.

The metadata in each buddy group have been saved and then restored separately.

Please let me know is there a chance that it could be possible to recover the data in this case?

Vladimir

[James Burton]

Unfortunately, "cp -a" doesn't preserve the xattr data that BeeGFS uses to store metadata. Without the xattr data, your copies are useless. 

If you have the original metadata storage targets, you can restore from them using "rsync -aHX". If not, your metadata may be lost.

Jim 

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James Burton

OS and Storage Architect

Advanced Computing Infrastructure

Clemson University Computing and Information Technology

340 Computer Court

Anderson, SC 29625

(864) 656-9047