Andreas Stieger to Anton Shepelev: > > Thanks to everybody for their replies. I now understand > > that -- incremental hot-copies are sufficient for > > regular backups, which can then be mirrored by content- > > aware file- synchronisation tools, but the problem > > remains of preventing an accidental propagation of > > corrupt data into the backup. How do you solve it? > > What the fruit do you mean? The whole purpose of a backup > is that you can restore previous points in time. That > means multiple points in time, whenever the backup > happened to be run. Don't just make a copy and overwrite > it every time. That is just copy, not a backup. Select > backup software that can do that.
No, it depends on one's purpose. If it is to keep the data in case of HDD crashes, a single mirror is sufficient. Then again, since an SVN repository maintains its whole history, a point-in-time recovery is easily effected by `svn up -r N'. The only potential problem is some quiet data corruption, which is why I ask: will `hotcopy' propagate data corruption or will it detect it via internal integrity checks and fail? -- Please, do not forward replies to my e-mail.
