Referencing http://lists.ceph.com/pipermail/ceph-users-ceph.com/2015-July/003293.html
When using --dmcrypt with ceph-deploy/ceph-disk, the journal device is not allowed to be an existing partition. You have to specify the entire block device, on which the tools create a partition equal to osd journal size setting. However, in the case when an HDD fails and OSD is deleted and then replaced with another HDD, I have not been able to find a way to reuse the earlier journal partition. Ceph-deploy creates a new one, which can lead into unpleasant situations on the SSD used for journaling. Is there a way anyone know of, to continue to use a specific partition as journal with ceph-deploy? Thanks in advance, Alex
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