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I´m configuring windows server backup as full system backup. It starts fine, but when it´s making system drive (c:) backup it stops at 40% every time i try. It only backups 7.28 GB of the total 18.19 GB. I tried changing destination drive and also checking c: filesystem in order to find any problem, but it seems to be ok and the problem is still the same. I got a message telling that the backup is completed with warnings. The warning details says that it didn´t complete backup because of input/output error in source or destination. Thanks for your help.

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Do the System event logs show things like disk errors? – Nathan C Jun 27 '13 at 9:54
No, there are no disk errors, neither filesystem errors. – Abraham Borbujo Jun 27 '13 at 9:58
Where (or what) is the destination drive? Might it be another device on the network? – Bryan Jun 27 '13 at 11:03
I tried different destinations, 2 network drives and one external drive. – Abraham Borbujo Jun 27 '13 at 11:53
Do the drives being backed up have enough free drive space to do a Volume Shadow Copy? – MikeAWood Jul 9 '13 at 23:14
up vote 0 down vote accepted

Finally real problem appeared. System hard drive has erro blocks. At first times diks checks seemed to be ok, but finally OS didn´t boot after one upgrade, so testing hard drive with HDDRegenerator i could find several blocks with errors. HDDregenerator fixed the block apparently but the errors cames again. After changing the hard drive and reinstalling it makes system backup fine. Thanks.

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