ORA-15132: block string of file string in diskgroup string could not be written
Cause: A block could not be written because the disk containing the block is either offline or an I/O error occured while writing the block. If this is mirrored file, then insufficient disks which contain a copy of the block are either offline or received errors.
Action: Repair the affected disk and bring it back online. Refer to accompanying error messages to determine which disk has failed.