The data is corrupted 8002f997

[laufz]

Hello. im trying to install OFW 4.8.9 to A HFW 4.8.9.2 firmware, i try to install it but whenever The system copy reaches 70% it just says the "error" message. Iam using a Usb Flashdisk CruzerBlade.
(sorry if the message is confusing,iam bad at English)

 

[Berion]

Issue updating the PS3 system software - Error occurred while checking update data; file may be corrupted.

CEX/DEX mismatch or file is corrupted (bad blocks on flash where update file lie or bad sectors on HDD where firmware is unpacking).

 

[laufz]

how do i fix it?

 

[Berion]

Change pendrive. If doesn't help, format HDD. If doesn't help, change HDD. If doesn't help, Your console turned into electrotrash.