Как гарантированно сделать backup

Att.bat:
at 01:00 /INTERACTIVE "e:\IB_DATA\BR.BAT"
BR.bat:
del e:\IB_DATA\b.txt
del e:\IB_DATA\r.txt
del e:\ib_data\AR_IB.PRV
del e:\IB_DATA\AR_IB.GBK
d:\ib_42\bin\gfix -shut -force 1 e:\ib_data\AR_IB.GDB -user "SYSDBA" -password "oooo"
net stop "InterBase Server"
copy e:\ib_data\AR_IB.GDB e:\ib_data\AR_IB.PRV
net start "InterBase Server"
d:\ib_42\bin\gbak e:\ib_data\AR_IB.GDB e:\ib_data\AR_IB.GBK -user "SYSDBA" -password "oooo" -B -L -Y "e:\IB_DATA\b.txt"
d:\ib_42\bin\gbak e:\ib_data\AR_IB.GBK e:\ib_data\AR_IB.GDB -user "SYSDBA" -password "oooo" -P 4096 -V -R -Y "e:\IB_DATA\r.txt"
Sergey Klochkovski