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Number : 821 Date : 2001-10-22 Author : Dan Anderson Subject : Re: Restoring from Full And Incremental Copy Size(KB) : 6
Luis, you may need someone smarter than me to sort this out. My limited understanding is working with xxcopy where it makes a full copy (clone) of the specified drive or subdirectories and then incremental runs will keep that full copy updated for any subsequent changes that occur up to the time that the xxcopy is run again. With that approach, the only way to have alternate checkpoints to choose from for restores would be to make full backup copies of each updated version of the clone. Your comments suggest an alternate approach (I don't know if Kan and the group have addressed this in the past because at first thought it doesn't seem too practical). That approach would be to have the option EACH time that xxcopy is run to: a) save any new files to a NEW and SEPARATE directory area which would duplicate the directory structure of the original source drive, b) identify files "to be" deleted in ANOTHER separate directory area (i.e.. don't actually delete the files on the original full clone nor prior incremental backups), and c) each time that xxcopy is run it must compare the current source directory contents with the COMBINED result of the original clone all subsequent incremental clones to determine what is a new-new file and new "to be" deleted files. When restores are done there would have to be some way to access all the various separate directory structures AND actually perform deletions for the "to be" deleted files AND somehow cope with changes to the directory structure. I don't know if I'm missing anything basic, but I don't see a practical implementation for what you are looking for, with or without xxcopy. Others' thoughts are welcome if only to confirm that such a wish-list is not practical with current basic technology or to show me that my thinking on this is too shallow !! Regards, ...Dan ========================= ----- Original Message ----- From: Luis J. Olivares Requejo To: Sent: Saturday, October 20, 2001 8:22 PM Subject: Re: [xxcopy] Restoring from Full And Incremental Copy > Hi again and thank you: > > So approach is making full backups every time? > I'm thinking in something like: > - Full Backup Every day (to cd-rw) > - At 8.0 a.m i make a full copy to another HD. > - At 12.0 a.m i make an incremental xxcopy using switches > for copying only new files and deleting if doesn't exist in > source. > - At 14.0 a.m i make an incremental xxcopy using switches > for copying only new files and deleting if doesn't exist in > source. > - At 16.0 a.m i make an incremental xxcopy using switches > for copying only new files and deleting if doesn't exist in > source. > - At 18.0 a.m i make an incremental xxcopy using switches > for copying only new files and deleting if doesn't exist in > source. > > This way i have an updated copy of the source. > Im interested in using copies at 12,14,16,18 as > "checkpoints" so i can "rool back" to any previous > situation, but i'm not interested in 4 full copies of > "everything". (think in 4 Gb Data with only 20 Mb changing > envery 2 hours, for example"). > > any suggestion about? > > --- Dan Anderson escribió: > > Luis, I'm not sure I fully understand but I'll try to > > respond. > > > > Using xxcopy is different than the old approach of > > creating a full > > backup and then separate incremental backups. To restore > > under the old > > approach you would restore the full backup and then the > > incremental, and > > would indeed be back at 100 files. > > > > Using xxcopy, a full backup is first made. When the > > second run is made, > > xxcopy will directly update the first backup that was > > made so that you > > now have 97 files. To restore, simply restore these 97 > > files. Don't > > make two restore runs. > > > > It seems to me that when you ran your second backup, you > > first made a > > copy of the full backup so that you had one copy that > > would not be > > affected when you made the incremental backup. If that's > > the case then > > simply ignore that copy of the full backup that you made > > on your first > > run. You do not need it to restore your 97 files. > > > > Hope that helps. > > > > Good luck. > > > > ...Dan > > > > > > ================================== > > > > > > > > ----- Original Message ----- > > From: Luis J. Olivares Requejo > > To: > > Sent: Friday, October 19, 2001 2:37 PM > > Subject: Re: [xxcopy] Restoring from Full And Incremental > > Copy > > > > > > > Please, can someone help me with this question? > > > > > > Tahnk you. > > > --- luis_j_olivares@y... escribió: > Supouse i > > make a > > > FULL copy to a CD (for exambple 100 > > > > files) > > > > > > > > some days later i make an incremental backup. Whe > > done > > > > the contnts of > > > > the backuped zone 3 files have been deleted, so the > > new > > > > "state" of > > > > the backuped ares is now 100-3=97 files. Ten more > > files > > > > have changed. > > > > > > > > Now i DELETE the backuped zone. > > > > > > > > I want to restore now. > > > > > > > > If i restore full backup first and incremental backup > > > > later, all the > > > > files are restored fine but the 3 ones deleted after > > the > > > > first full > > > > backup are there. > > > > > > > > > > > > How can i solve that? > > > > > > > > > > > > > > > > ------------------------ Yahoo! Groups Sponsor > > > > > > > > > > > > > > > > Your use of Yahoo! Groups is subject to > > > > http://docs.yahoo.com/info/terms/ > > > > > > > > > > > > > > > > > _______________________________________________________________ > > > Nokia Game ha comenzado > > > Haz clic y disfruta de la nueva aventura multimedia de > > Nokia > > > antes del 3 de noviembre. > > > http://es.promotions.yahoo.com/info/nokiagame > > > > > > ------------------------ Yahoo! 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