EM Alert: Critical: server - Disk Utilization for 1 D: is 99.8

hello!
in the last day's i receive the following error message every 2 or 3 hours:
Name=server
Typ=Host
Host=server
Metrik=Disk Utilization (%)
Disk Device=1 D:
Zeitstempel=12.04.2010 12:29 Uhr CEST
Dringlichkeit=Kritisch
Nachricht=Disk Utilization for 1 D: is 99.81%
Regelname=Host Availability and Critical States
Regeleigentümer=SYSMAN
first i thought it's because the "db_recovery_file_dest_size" parameter was to small, because it was set to 10gb and the FRA was almost 10gb. then i raised the parameter (without restarting the database), but the same problem after a few hours.
select * from v$recovery_file_dest;
d:\FRA\     21474836480     10648922624     10073876992     458
is it necessary to restart the database after reseting this parameter?
thx for your help!
ciao,
christian

There are many bugs on metalink on this.
Better to raise a SR with OSS.
Bug 6809811: DISK UTILIZATION (%) REPORTS 99.8% WHEN THERE IS PLENTY OF SPACE
Regards
Rajesh

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