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How to know which files are damaged on each drive in a redundant backup

This is a discussion on How to know which files are damaged on each drive in a redundant backup within the Hard Drive Support forums, part of the Tech Support Forum category. My archiving/backup scheme includes two hard drives, a primary (which I read data off of most often) and a backup


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Old 08-28-2008, 10:09 AM   #1
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My archiving/backup scheme includes two hard drives, a primary (which I read data off of most often) and a backup which is a duplicate of the primary disk. My worry and hence question is lets say I develop a bad sector on one of these disks, technically that is no problem because I could just have XP map that sector as bad and continue storing the data elsewhere. I could fill in the data that was lost in the bad sector from the redundant drive. However, how will I know which files were ruined in the bad sector so that I can recopy them over. I could just periodically delete everything on the secondary backup, check for bad sectors, and then recopy all the files back over from the primary, but what if I had bad sectors on my primary, then I would totally lose those files on both the primary and then secondary. Is there some sort of software which can manage two disks like this, and periodically validate that all of the data is there and accessible (not unreadable on a bad sector) and when it finds files that are destroyed, recopy those files over from the other redundant disk.

Possibly could I do this by setting up a RAID configuration?
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Old 08-28-2008, 11:24 AM   #2
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yes a raid striped array will do this. WHat is the size of data we're talking about?
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Old 08-28-2008, 12:16 PM   #3
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250 Gigs. the RAID will constantly try to verify file integrity? What if theres a file I don't use for years, will it slip through the cracks?

Do any of the disk check programs tell you which files are affected from bad sectors?
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Old 08-30-2008, 07:34 AM   #4
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Research RAID arrays, as i think possible a mirrored array will suit your purposes. That way if one drive fails, the other has the same info.
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