Incremental backups suddenly take MUCH longer

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truwrikodrorowrelupicugojestutroclulachosaswunuhospikigawakijosaswenomaruclojeueclikaspedrubewidebrisubrohutrurifruuagothunugekedrumucisiuobrobrecrupeslapuswosluprothethibakaslechurathikucli
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I configure TIH to perform one full backup and then five incremental backups before the next full one. I've run this way for years and the daily incremental backups usually completed within 5 or 10 minutes.

I don't think I've changed anything (famous last words!), but now the incrementals are taking 30 to 90 minutes to complete. Watching I/O Other activity with Task Manager, I see that it's running at about the speed I'm used to - about 100MB/s just as before, but it looks like backup is reading every single byte in every partition when doing the incremental backup. I thought that scheme would only back up (and, therefore read?) only the changed files.

Could this be a change in Windows behavior - i.e., how it marks files as changed or something??

Jason

Tue, 12/30/2014 - 03:09
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truwrikodrorowrelupicugojestutroclulachosaswunuhospikigawakijosaswenomaruclojeueclikaspedrubewidebrisubrohutrurifruuagothunugekedrumucisiuobrobrecrupeslapuswosluprothethibakaslechurathikucli
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Compare the size of the new inc with old inc for comparison. Any defrag between backups would cause a lot of disk changes and TI tracks disk sector changes--not file changes. Likewise, if disk itself has issues, it will do lots or disk reads which is time consuming. You may want to check your disk for disk errors.

Validation also takes time. Inc 4 or 5 will take longer than inc 1 as the validation reads all in the specific chain.

Tue, 12/30/2014 - 03:55
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