Comment 4 for bug 1590945

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James Page (james-page) wrote : Re: ceph-osd should not create adirectory specified in 'osd-devices' but expect it to exist, else skip

I guess the question really is whether we want to support use of bcache devices for OSD's - the alternative is to not use the whole of the underlying SSD for bcache, reserving part of it for use by ceph as a journal device for underlying SATA or SAS spindles.