In this post, you’ll learn more about the Oracle ErrorORA-02821: Unable to read the requested number of blocks. with the details on why you receive this error and the possible solution to fix it.
Oracle Error Description
ORA-02821: Unable to read the requested number of blocks.
Reason for the Error ORA-02821: Unable to read the requested number of blocks.
A server could not read the number of blocks that was requested. The end of the file may have been read.
How to fix the Error ORA-02821: Unable to read the requested number of blocks. ?
You can fix this error in Oracle by following the below steps
Check the file on disk.