среда, 20 мая 2015 г.

fujitsu: Improved data reliability combined with Oracle DB - DB (Data Base) Data Guard

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 =)

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