How to fix the Oracle error ORA-15131: block string of file string in diskgroup string could not be read?

In this post, you’ll learn more about the Oracle ErrorORA-15131: block string of file string in diskgroup string could not be read with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-15131: block string of file string in diskgroup string could not be read

Reason for the Error ORA-15131: block string of file string in diskgroup string could not be read

A block could not be read because the disk containing the block is either offline or an I/O error occured while reading the block. If this is mirrored file, then all disks that contain a copy of the block are either offline or received errors.

How to fix the Error ORA-15131: block string of file string in diskgroup string could not be read ?

You can fix this error in Oracle by following the below steps

Repair the affected disk and bring it back online. Refer to accompanying error messages to determine which disk has failed.