Follow the steps given below:
a. Take Data backup
b. Check the file size of Manager.900 / Linkmgr.900 . If the file size is 1 KB , restore the earlier backup, if any.
c. If Manager.900 / Linkmgr.900 file size is more, follow the below steps of Rewrite.
o Take the existing backup of the corrupted data and perform a zero command rewrite .
o It is also advisable to check the bad sectors in Hard Disk . Click here to view the procedure.