From: Wolfgang Walter Subject: external journal an data= option Date: Mon, 21 Nov 2016 16:39:53 +0100 Message-ID: <5330915.k0A4yo7VY8@stwm.de> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 8BIT Cc: linux-ext4@vger.kernel.org To: LKML Return-path: Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-ext4.vger.kernel.org Hello, while testing ext4 with an external journal I found the following problem with longterm kernel 4.4.30: I could mount the filesystem without specifying the option data=.... It seems that it is then mounted with data=ordered and indeed this is what cat /proc/mounts shows. But I could not change any option afterwards with -o remount. It always said that data=ordered is not valid with an external journal. If I mount with explicitly stating data=writeback or data=journal remount works fine. So It seems that ext4 does forbid (at least in 4.4.30) data=ordered as an option but uses it implicitly as default mode even with an external journal. Regards, -- Wolfgang Walter Studentenwerk M?nchen Anstalt des ?ffentlichen Rechts