Hi,
> ok...OSD stop. Any reason why OSD stop ( I assume if journal disk
> fails, OSD should work as no journal. Isn't it?)

No. In my understanding - if a journal fails, all the attached (to this Journal 
HDD) OSD's fails also.

E.g. if you have 4 OSD's with the 4 journals's located on one SSD-hard disk, 
the failure of this SSD
will crash/fail also your 4 OSD's.

regards
Danny


> 
> Not understand, why the OSD data lost. You mean - data lost during the
> traction time? or total OSD data lost?
> 
> Thanks
> Swami
> 
> On Mon, Jan 25, 2016 at 7:06 PM, Jan Schermer <j...@schermer.cz> wrote:
> > OSD stops.
> > And you pretty much lose all data on the OSD if you lose the journal.
> >
> > Jan
> >
> >> On 25 Jan 2016, at 14:04, M Ranga Swami Reddy <swamire...@gmail.com> wrote:
> >>
> >> Hello,
> >>
> >> If a journal disk fails (with crash or power failure, etc), what
> >> happens on OSD operations?
> >>
> >> PS: Assume that journal and OSD is on a separate drive.
> >>
> >> Thanks
> >> Swami
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> >
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