How to Resize/Expand a Btrfs Volume
Last updated on SEPTEMBER 03, 2017
Applies to:Linux OS - Version Oracle Linux 6.0 and later
It is a common task to resize/expand btrfs file system since btrfs is widely used in Oracle Linux 7 and also as Docker's backend storage driver.
This note illustrates 2 common procedures to expand a btrfs root volume:
1. Expand to use available space on original disk
2. Add a new disk into the same btrfs volume
These procedures are risky due to possible mistakes made in changing existing partitions or unexpected power outages during btrfs balance operation, please make sure your data/system has a latest usable BACKUP.
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