/en/tags/oracle-cloud/Recent content in Oracle-Cloud on Xerxes II's BlogHugoenMon, 06 Apr 2026 00:00:00 +0000/en/posts/ext4-to-btrfs-oracle-cloud/Mon, 06 Apr 2026 00:00:00 +0000/en/posts/ext4-to-btrfs-oracle-cloud/<p>A writeup of converting an Oracle Cloud Ubuntu 26.04 ARM VM from ext4 to Btrfs in place.</p> <blockquote> <p><strong><span style="color:red">WARNING</span>: The operations in this post involve an in-place filesystem conversion — if anything goes wrong, data cannot be recovered. My VM was a blank machine with no important data, which is the only reason I felt comfortable doing this. If your machine has anything you can&rsquo;t afford to lose, make sure you have a full backup first (Oracle Cloud Boot Volume Backup, rsync to a remote, dd image, etc.), and verify it&rsquo;s actually restorable before proceeding. A failed filesystem conversion with no backup means total data loss — there&rsquo;s no undoing it.</strong></p>