Questions on the generated PFILE

Hi all,
I modified values of some init parameters using the command ALTER SYSTEM SET parameter=newvalue.
Then, I create PFILE using the command create pfile='c:\test.ora' from spfile;
I opened the generated PFILE and noticed the following:
1. I didn't see the parameter I modified by the ALTER SYSTEM command? (it was DB_UNIQUE_NAME)
2. parameter=value pairs were preceded in the file with "*-". Is that correct? As far as I know, PFILE is ASCII file that contains parameter=value pairs without any preceded characters required.
Thanks in advance.

You can not modify this value on the fly.
Here is the reason:
SQL> select name, ISSYS_MODIFIABLE from v$parameter
2 where name = 'db_unique_name';
NAME
ISSYS_MOD
db_unique_name
FALSE

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Message was edited by:
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