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Thu, 2 Apr 2026 14:32:34 -0400 (EDT) X-Mailer: MessagingEngine.com Webmail Interface Precedence: bulk X-Mailing-List: linux-btrfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ThreadId: AHOSv8xyFIdR Date: Thu, 02 Apr 2026 14:32:02 -0400 From: remi@georgianit.com To: "Qu Wenruo" , "Amit Shah" , linux-btrfs@vger.kernel.org Message-Id: <571fb6a8-d4e7-42ed-9f19-22962163918d@app.fastmail.com> In-Reply-To: References: <8c8e2466574b29ba1da29c325a108824c8373a85.camel@infradead.org> Subject: Re: Fixing a corrupted file system Content-Type: text/plain Content-Transfer-Encoding: 7bit On Wed, Apr 1, 2026, at 5:21 PM, Qu Wenruo wrote: > > Nope, btrfs will only try extra mirrors, but in your case your metadata > doesn't even have extra mirrors. > Which is not common, as the default btrfs mkfs profiles will go DUP for > metadata. I forget what mkfs version, but the default behaviour changed a few years ago so the default profile is Single on SSD's. (Correct me if this has since been reverted.) Something about the way SSD's copy on write, the DUP entries would end up on the same physical block, so the redundancy was not effective.