On 09/20/2016 01:38 AM, Guoqing Jiang wrote:

Thanks for report, could you try the latest tree git://git.kernel.org/pub/scm/utils/mdadm/mdadm.git? I guess 45a87c2f31335a759190dff663a881bc78ca5443 should resolve it , and I can add a spare disk to native raid (internal bitmap) with different metadatas (0.9, 1.0 to 1.2).

(please keep me cc'd, I'm not subscribed)

$ git rev-parse --short HEAD
$ make -j4

# ./mdadm -a /dev/md/pv0 /dev/sdc3
mdadm: add new device failed for /dev/sdc3 as 8: Invalid argument

[375036.613907] md: sdc3 does not have a valid v1.0 superblock, not importing!
[375036.613926] md: md_import_device returned -22

So current master seems to be back to broken completely. It's 3AM here, will check more (and do another bisect, to find when it went from weird-errors-but-works to broken) tomorrow.

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