Daniel Pocock wrote (2014/12/04): > On 04/12/14 18:35, Kern Sibbald wrote: > > On 12/03/2014 08:49 PM, Daniel Pocock wrote: > >> > >> Does Bacula checksum content on the spool disk before sending it to tape? > >> > >> To be more explicit, if there is a single bit error on the spool disk, > >> will it be noticed before going onto tape or would it only be noticed in > >> future when a file is taken off the tape? > > > > Unless you are running ZFS for the spool disk, the error will only be > > noticed when the data is read from the tape. > > > > In that case, it sounds like a good idea to use ZFS or Btrfs with > checksums enabled
Hard drives use error correction/detection codes, so single bit error without any error indication is unlikely. Especially in case of spool disks, where datas are read shortly after write. -- Rudolf Cejka <cejkar at fit.vutbr.cz> http://www.fit.vutbr.cz/~cejkar Brno University of Technology, Faculty of Information Technology Bozetechova 2, 612 66 Brno, Czech Republic ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
