After mount database not open.
Using DB -11.1.0.7 and application R12.1.3 on RHEL5 x86.
After mounted database try to open given below error.
SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-01110: data file 148:
'/VIS/VIS_Instance/oravis/db/apps_st/data/tx_data48.dbf'
ORA-01115: IO error reading block from file 148 (block # 1)
ORA-27072: File I/O error
Linux Error: 5: Input/output error
Additional information: 4
Additional information: 1
Additional information: -1