Dencorso and Jaclaz - what about chkdsk /f ? (Might it be dangerous?)
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POSReady 2009 updates ported to Windows XP SP3 ENU
Posted Yesterday, 09:33 PM
glnz old Dell Optiplex 755DT XP Pro SP3 and new Optiplex 7010MT dual-booting Win7 Pro 64-bit and Win 8.1 Pro 64-bit (maybe soon Win 10?)
Posted Yesterday, 10:22 PM
If chkdsk /f finds something, I'd really start to get worried... but even if it finds anything, it cannot recreate a good profile from a damaged one. However, that's another thing you should do only after you have a good backup. Your plan to put in another disk and restore the backup on it, then work on the new disk is sound and safe. Don't try to get a shortcut... usually that's something one regrets afterwards. This is the sort of situation where Murphy's Law applies: so, one has to make sure nothing relevant may go wrong, and then nothing at all will.
BTW, is your XP installed on NTFS or on FT-32? I have assumed it's on NTFS, but the only way to be sure is by asking you, of course.
Posted Today, 03:02 AM
Yes, for the record if chkdsk finds an issue with file/folder permissions it attempts to fix it, but not necessarily it fixes it "right", so running it is (on the new, redeployed backup) is a very good idea , but unlikely it will be bale by it's own to fix the issue.
An example (not necessarily what happened or happens to you):
- a bit or a set of bits are corrupted on the filesystem
- you cannot manually (because it throws an error) change the owner or permissions of a file
- you then run chkdsk (which will hopefully repair the $MFT or *whatever* holding the permissions data)
- chkdsk very likely will reset those data to a "default" that may (or may not be the desired setting)
- then you reattempt changing the owner/permissions of that file to the desired ones and this time it works because the underlying structure is "fixed"
In theory verifying the filesystem structures is a "common enough" and "safe enough" activity, but in practice - particularly when there is a suspect of a filesystem level corruption - it is much safer to make a full backup before.
The three golden rules of backup:
- Backup another time to another media.
- While pondering on the duality and redundance in the essence of the previous two rules, do backup AGAIN on a third media.
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