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PH0PR10MB5706.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 Jul 2023 04:49:23.1105 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 4e2c6054-71cb-48f1-bd6c-3a9705aca71b X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 7pdCJaqAhq7OH0BgWm0P19CYh1fAu7/TaiQO1nDr6NY4dpESJwQDXEO9mKjrN/Vbj+xQ9boyfgFZMhJXPk1VPg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN7PR10MB6498 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-07-21_02,2023-07-20_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 phishscore=0 adultscore=0 mlxscore=0 bulkscore=0 spamscore=0 malwarescore=0 mlxlogscore=999 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2306200000 definitions=main-2307210044 X-Proofpoint-GUID: w4vYVqjIypg69Q96REkzQOI5E_-5ZNz- X-Proofpoint-ORIG-GUID: w4vYVqjIypg69Q96REkzQOI5E_-5ZNz- Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org On 21/7/23 04:10, Eric Levy wrote: > > > On Thu, Jul 20 2023 at 01:48:24 PM +0800, Anand Jain > wrote: >> >> >> On 20/07/2023 10:50, Eric Levy wrote: >>> >>> >>> On Thu, Jul 20 2023 at 10:26:57 AM +0800, Anand Jain >>>  wrote: >>>> On 20/07/2023 09:13, Eric Levy wrote: >>>>> I recently performed a routine update on a Linux Mint system, >>>>> version 21.2 (Victoria). The update moved the kernel from >>>>> 5.19.0 to 6.2.0. The system includes a non-root mount that is >>>>> Btrfs with RAID, which no longer mounts. Error reporting is >>>>> rather limited and opaque. >>>>> >>>>> I am assuming the file system is healthy from the standpoint of the >>>>> old kernel, but I may need help understanding how to make it >>>>> viable for the new one. >>>>> >>>>> Mounting from the command line prints the following: >>>>> >>>>> mount: /mnt: wrong fs type, bad option, bad superblock on /dev/sdg, >>>>> missing codepage or helper program, or other error. >>>>> >>>>> The following is extracted from the boot sequence recorded in the >>>>> kernel ring: >>>>> >>>>> kernel: BTRFS error: device /dev/sdd belongs to fsid >>>>> c6f83d24-1ac3-4417-bdd9-6249c899604d, and the fs is already >>>>> mounted >>>>> kernel: BTRFS error: device /dev/sdf belongs to fsid >>>>> c6f83d24-1ac3-4417-bdd9-6249c899604d, and the fs is already >>>>> mounted >>>>> kernel: BTRFS info (device sde): using crc32c (crc32c-intel) >>>>> checksum algorithm >>>>> kernel: BTRFS info (device sde): turning on async discard >>>>> kernel: BTRFS info (device sde): disk space caching is enabled >>>>> kernel: BTRFS error (device sde): devid 7 uuid >>>>> 2f62547b-067f-433c-bec1-b90e0c8cb75e is missing >>>>> kernel: BTRFS error (device sde): failed to read the system array: -2 >>>>> kernel: BTRFS error (device sde): open_ctree failed >>>>> mount[969]: mount: /mnt: wrong fs type, bad option, bad superblock >>>>> on /dev/sde, missing codepage or helper program, or other error. >>>>> systemd[1]: mnt.mount: Mount process exited, code=exited, >>>>> status=32/n/a >>>> >>>> >>>> Looks like the fsid is already mounted. Could you please help check? >>>> >>>>     cat /proc/self/mounts | grep btrfs >>>> >>>> You could try a fresh scan and mount. >>>> >>>>     umount  .. >>>>     btrfs device scan >>>>     mount ... >>>> >>>> If this doesn't help. Can you share the output of: >>>> >>>>     btrfs filesystem dump-super /dev/sd[a-g]  <-- basically all devices >>>> >>>> Thanks. >>> >>> >>> The unmount command followed by rescan does enable a successful >>> mount, but the suggestion that the volume was mounted already had >>> not been validated by the dump of the mount table. Based on the >>> mount table, the volume appeared as unmounted even before the command. >>> >>> Do you have any suggestions for how to resolve why the volume would >>> be registered as having been mounted? >> >>  As mentioned, dump-super might help. > > > After further investigation, I believe the issue is not particularly > related to the kernel or the filesystem. > > I believe that systemd is attempting to mount a volume before all of the > devices are attached through the iSCSI login process. > > The issue may be outside the scope of Btrfs, but I certainly would > appreciate any suggestions. > > How can systemd be forced to wait, before attempting to mount, until all > units in the volume, identified by an UUID, have been successfully > attached? Thanks for narrowing it down. Please check if you have the btrfs kernel commit: 50d281fc434c btrfs: scan device in non-exclusive mode This commit addresses a bug that was caused by interference from systemd during the device scan/mount process.