ORA-01034 and ORA-27101 solutions when you log on to Oracle ____oracle

The report exception was found when you logged on to Oracle using Pl/sql Developer:
Ora-01034:oracle Not available
Ora-27101:shared Memory realm does not exist
Then manually start the database instance:
C:\users\wlshi>sqlplus/nolog
Sql*plus:release 10.2.0.3.0-production on Friday August 16 13:57:27 2013
Copyright (c) 1982, 2006, Oracle. All Rights Reserved.
Sql> Conn/as SYSDBA
You are connected to an idle routine.
Sql> Startup
But then again the error:
Ora-01261:parameter db_recovery_file_dest Destination string cannot be translated
Ora-01263:name given for file destination directory is invalid
OSD-04018:??????????????????????????
O/s-error: (OS 2)??????????????????????
is actually a spfile file in a path db_recovery_file_dest cannot find the resulting. So I found this sPfile file to see how it was written inside. My file path is: D:\Oracle\product\10.2.0\db_1\database\SPFILEORCL. ORA
Using Notepad to open the discovery is a binary file, but fortunately the path can still be seen.
orcl.__db_cache_size=411041792
orcl.__java_pool_size=16777216
orcl.__large_pool_size=4194304
orcl.__shared_pool_size=163577856
Orcl.__streams_pool_size=0
*.audit_file_dest= ' D:\oracle\product\10.2.0\admin\orcl\adump '
*.background_dump_dest= ' D:\oracle\product\10.2.0\admin\orcl\bdump '
*.compatible= ' 10.2.0.3.0 '
*.control_files= ' D:\oracle\product\10.2.0\oradata\orcl\control01.ctl ', ' D:\oracle\product\10.2.0\oradata\orcl\ Control02.ctl ', ' D:\oracle\product\10.2.0\oradata\orcl\control03.ctl '
*.core_dump_dest= ' D:\oracle\product\10.2.0\admin\orcl\cdump '
*.db_block_size=8192
*.db_domain= '
*.db_file_multiblock_read_count=16
*.db_name= ' ORCL '
*.db_recovery_file_dest= ' D:\oracle\product\10.2.0\flash_recovery_area '
*.db_recovery_file_dest_size=2147483648
*.dispatchers= ' (protocol=tcp) (SERVICE=ORCLXDB) '
*.job_queue_processes=10
*.open_cursors=300
*.pga_aggregate_target=200278016
*.processes=150
*.remote_login_passwordfile= ' EXCLUSIVE '
*.sga_target=600834048
*.undo_management= ' AUTO '
*.undo_tablespace= ' UNDOTBS1 '
*.user_dump_dest= ' D:\oracle\product\10.2.0\admin\orcl\udump '
Obviously can't find D:\oracle\product\10.2.0\flash_recovery_area, so I opened the resource Manager a look, Flash_recovery_area this directory does not exist, a new flash_ Recovery_area folder and then start the database instance is no problem.
Sql> Startup
The ORACLE routine has started.
Total System Global area 603979776 bytes
Fixed Size 1291988 bytes
Variable Size 184551724 bytes
Database buffers 411041792 bytes
Redo buffers 7094272 bytes
Database loading complete.
The database is already open.