A device specific error occurred from NDMP to external HDD always on the same place

Hello,

I am using Backup Exec 2012 R3 on Windows 2003 R2.

When start backup from NDMP to external hdd always get error "A device specific error occurred". I receive error on the same size every time. For example on one backup after 100 gb it gives en error. For another one after 18gb. Error is always appearing on the same amount of data. Always after 100,225,850 on one and 18,445.200 on another one. HDD is WD 1TB with RAID1 configured. It is working normally. Thanks.