ETERNUS disk storage systems check data security using Data Block Guard technology.
While this is very important, it does not cover situations where data 
corruption occurs in the interfaces between systems. This is because 
Data Block Guard only verifies data after it has reached the storage 
device.
That is why Fujitsu also uses another data protection mechanism called 
"DB (Data Base) Data Guard". This combination of data security measures 
Oracle Data Base, means ETERNUS disk storage systems are able to deliver
 very robust data integrity.
      As data is written into the disk storage system, the database 
adds check codes. The disk storage system has knowledge of the logic of 
these check codes and where the codes are placed enabling it to verify 
the data using the check codes.
If an ETERNUS disk storage system identifies any data corruption, it 
will stop further operation and notify the administrator; thereby 
preventing the use of data known to be corrupt.
http://www.fujitsu.com/global/products/computing/storage/disk/eternus-dx/feature/strsys-a05.html 
Фактически вместо ORA-600 при обращении к битому экстенту получите полную остановку до устранения, путь истинного самурая =)