11gR2(Test) Flash Cache on Redhat

I'd like to test Flash Array , then I installed Oracle 11gR2 ( + patched 8974084) on RHEL 5.3 and want to test Flash Cache Feature.

# cat /etc/redhat-release
Red Hat Enterprise Linux Server release 5.3 (Tikanga)

I don't check much oracle document, just read about configuration.
Choose disk:

# fdisk -l /dev/sdc

Disk /dev/sdc: 24.5 GB, 24575868928 bytes
255 heads, 63 sectors/track, 2987 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Disk /dev/sdc doesn't contain a valid partition table
# chmod 777 /dev/sdc

set Oracle initialization parameters:

$ sqlplus / as sysdba

SQL> alter system set db_flash_cache_file='/dev/sdc' scope=spfile;

System altered.

SQL> alter system set db_flash_cache_size=10G scope=spfile;

System altered.

Stop/Start database

SQL> shutdown immediate

SQL> startup
ORA-00439: feature not enabled: Server Flash Cache
ORA-01078: failure in processing system parameters

I found above error, then asked ... and find out. I found (oracle docs):

Your database is running on the Solaris or Oracle Enterprise Linux operating systems. The flash cache is supported on these operating systems only.

So, I had plan to install OEL. But... I'd like to figure out on Redhat as well.

Thank You Kevin Closson for figure me out. He is helpful me. I can use flash cache feature on Redhat.

SQL> startup;
ORACLE instance started.

Total System Global Area 7549435904 bytes
Fixed Size 2214456 bytes
Variable Size 4026533320 bytes
Database Buffers 3489660928 bytes
Redo Buffers 31027200 bytes
Database mounted.
Database opened.

SQL> show parameter db_flash_cache_file

NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
db_flash_cache_file string /dev/sdc

SQL> show parameter db_flash_cache_size

NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
db_flash_cache_size big integer 10G

-)

Remark:
Using db_flash_cache_file =/dev/sdc, Check -> A device name is Flash Cache File, isn't it?

$ dd if=/dev/sdc count=1024 | strings
Oracle RDBMS Flash Cache File
orcl
1024+0 records in
1024+0 records out
524288 bytes (524 kB) copied, 0.008165 seconds, 64.2 MB/s

Just Idea.