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Re: [linux-lvm] what is writed on raw disk,



i want to know lvm2 on source-code level.
and  kernel device-mapper??
just analysis source code is hard, can you give me some function-call stream.
and whole blueprint.

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At 2010-09-10 23:47:01,"Zdenek Kabelac" <zkabelac redhat com> wrote: >Dne 10.9.2010 17:00, yue napsal(a): >> VolGroup00 { >>  id = "QCNEJh-9bbG-x6AV-uZEz-Dhsi-1LL7-fYSWbL" >>  seqno = 4 >>  status = ["RESIZEABLE", "READ", "WRITE"] >... >>   } >>  }//logical_volumes >> } >> ------------------------------------ >> how many this kind of struct is writed on raw disk,and its value???what is different?? >> how a group is parsed? > > >There is always at least one back-up copy, to be able to do commit - first >write new metadata - and when they are fully written mark them as valid. So in >case of any write problem there is always previous last valid version >available - see pvcreate --metadatasize --metadatasize  and some other options >in manpage) > >Major part of parser is located in lib/config/config.c. > >As for your previous question about some detailed  LVM architecture document - >well mostly only the source code itself... > >It would probably be better to specify what are you trying to achieve to get >help with that ? > >Zdenek



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