On 8/25/22 18:55, NeilBrown wrote: > > When the metadata is at the start of the device, it is possible that it > describes a device large than the one it is actually stored on. When > this happens, report it loudly in --examine. > > .... > Unused Space : before=1968 sectors, after=-2047 sectors DEVICE TOO SMALL > State : clean TRUNCATED DEVICE > .... > > Also report in --assemble so that the failure which the kernel will > report will be explained. > > mdadm: Device /dev/sdb is not large enough for data described in superblock > mdadm: no RAID superblock on /dev/sdb > mdadm: /dev/sdb has no superblock - assembly aborted > > Scenario can be demonstrated as follows: > > mdadm: Note: this array has metadata at the start and > may not be suitable as a boot device. If you plan to > store '/boot' on this device please ensure that > your boot-loader understands md/v1.x metadata, or use > --metadata=0.90 > mdadm: Defaulting to version 1.2 metadata > mdadm: array /dev/md/test started. > mdadm: stopped /dev/md/test > Unused Space : before=1968 sectors, after=-2047 sectors DEVICE TOO SMALL > State : clean TRUNCATED DEVICE > Unused Space : before=1968 sectors, after=-2047 sectors DEVICE TOO SMALL > State : clean TRUNCATED DEVICE > > Signed-off-by: NeilBrown <neilb@xxxxxxx> > --- Applied! Thanks Neil! Jes
