Rollback and scandisk

[orian]

I read somewhere that using scandisk while Rollback is installed wasn't a good idea, as it can ruin your PC. Is this true?

[pvsurfer]

Originally Posted by orian

I read somewhere that using scandisk while Rollback is installed wasn't a good idea, as it can ruin your PC. Is this true?

Presuming you mean Windows chkdsk utility, then no, that's not true (I've never had any such problem). You see, Rollback Rx protects the hard drive sectors containing its snapshots. If and when Windows attempts to write to those protected sectors RBRx redirects the write.

pv

[orian]

Thanks. For some reason I was under the impression that chkdsk operated beneath Rollback's snapshots.

[pvsurfer]

Originally Posted by orian

...For some reason I was under the impression that chkdsk operated beneath Rollback's snapshots.

I'm not sure I understand what you mean, but 'chkdsk' works well on my system whenever I run it (from either 'Run' or my C-drive's 'Properties|Tools|Error-Checking').

pv

[Owl]

Originally Posted by orian

Thanks. For some reason I was under the impression that chkdsk operated beneath Rollback's snapshots.

As far as I know, chkdsk is not looking at low level disc stuff - it is examining the filing system structures for consistency. RBRx interposes a layer between the OS and the raw disc, and converts on the fly. Thus the OS (and chkdsk) sees what it expects to see, while the RBRx layer preserves snapshots and redirects IO appropriately.

Anything that did bypass the RBRx layer would see the baseline snapshot file structure, and if it attempted any writes may well corrupt the snapshot database. Consequently, I (personally) would be very cautious allowing chkdsk to "correct" any errors found - may well be OK, but a roll back to a previous snapshot should equally well correct the problem.

[orian]

I just this instant came across this forum thread discussing some of the possible problems with Rollback and chkdsk.

how to use chkdsk c: /f with RB

It might further answer my question.