In short, hammer doesn't solve (or fix) what you call bit-rot.
2016-12-26 20:30 GMT+09:00 vincent delft <[email protected]>: > Hello, > > First of all I'm new to DF. > Thanks for the nice install process. It's a quite easy to have DF running. > But my concerns are more linked to HammerFS. > > My context is the following: > - I would like to have a NAS system running on a small machine: 4GB RAM > having a celeron CPU of 1.6GHz. > - This NAS host +- 700GB of data > - I plan to install 1 disk of 1TB in the NAS and keep a second disk of 1TB > outside the NAS for DRP reasons. > - I'm looking for a solution tackling the bit-rot problem. > > > Concerning HammerFS, I've still read lot of DF manuals, pages, ... : > > http://lists.dragonflybsd.org/pipermail/users/2015-March/207585.html > http://lists.dragonflybsd.org/pipermail/users/2006-June/297848.html > http://lists.dragonflybsd.org/pipermail/users/2016-March/228659.html > http://lists.dragonflybsd.org/pipermail/users/2015-January/311705.html > https://www.dragonflybsd.org/hammer/ > > So basically, I've understood that I must install DF on a small SSD disk and > will dedicated the 1TB disk to HammerFS. > > But I have some questions: > - What must be the setup of HammerFS to solve "bit-rot" ? Should it be Raid1 > or Raid5, ... ? Can it be done on 1 physical disk (thus 2 filesystems) ? > Should it be 2 PFS in 1 HammerFS located on 1 slice or should I create 2 > slices on the disk? > > - For DRP reasons, how can I perform a backup on an external disk ? (the > disk is only connected 1x per month on the NAS). Should I do a "dd" ? should > I use the master-slave concepts ? Should I use cpdup ? > > Many thanks for your replies. > > Vincent > >
