I heard about the SMART support for Areca controllers so i tried it, but it didn't work for me.

I get the following error message, but i have firmware version 1.47:
smartctl 5.39 2009-09-04 r2902 [x86_64-unknown-linux-gnu] (local build)
Copyright (C) 2002-9 by Bruce Allen, http://smartmontools.sourceforge.net

The firmware of your Areca RAID controller appears to be outdated!
Please update your controller to firmware version 1.46 or later.
You may download it here: ftp://ftp.areca.com.tw/RaidCards/BIOS_Firmware

Smartctl: Device Read Identity Failed (not an ATA/ATAPI device)

A mandatory SMART command failed: exiting. To continue, add one or more '-T permissive' options.
OS: Gentoo Linux x86_64
Kernel: 2.6.30-gentoo-r4

smartctl Version Information:
smartctl 5.39 2009-09-04 r2902 [x86_64-unknown-linux-gnu] (local build)
Copyright (C) 2002-9 by Bruce Allen, http://smartmontools.sourceforge.net

smartctl comes with ABSOLUTELY NO WARRANTY. This is free
software, and you are welcome to redistribute it under
the terms of the GNU General Public License Version 2.
See http://www.gnu.org for further details.

smartmontools release 5.39 dated 2008/03/10 at 10:44:07 GMT
smartmontools SVN rev 2902 dated 2009-09-04 at 21:27:53
smartmontools build host: x86_64-unknown-linux-gnu
smartmontools build configured: 2009/09/05 14:40:28 UTC
smartctl compile dated Sep  5 2009 at 16:40:40
smartmontools configure arguments:  '--prefix=/usr/local/smartmontools'
Controller System Information:
Controller Name     ARC-1680
Firmware Version     V1.47 2009-07-16
BOOT ROM Version     V1.47 2009-06-25
SAS Firmware Version
Serial Number     Y825CABWAR800223
Unit Serial #      
Main Processor     1.2GHz IOP348 C1
CPU ICache Size     32KBytes
CPU DCache Size     32KBytes/Write Back
CPU SCache Size     512KBytes/Write Back
System Memory     512MB/533MHz/ECC
Current IP Address
dmesg snippet:
[    1.461030] ARECA RAID ADAPTER0: FIRMWARE VERSION V1.47 2009-07-16
[    1.478043] scsi0 : Areca SAS Host Adapter RAID Controller( RAID6 capable)
[    1.478044]  Driver Version 2008/02/27
[    1.493471] scsi 0:0:0:0: Direct-Access     Areca    ARC-1680-VOL#000 R001 PQ: 0 ANSI: 5
[    1.501482] scsi 0:0:0:2: Direct-Access     Areca    ARC-1680-VOL#002 R001 PQ: 0 ANSI: 5
[    1.509880] scsi 0:0:16:0: Processor         Areca    RAID controller  R001 PQ: 0 ANSI: 0
[    1.542555] sd 0:0:0:0: Attached scsi generic sg0 type 0
[    1.542609] sd 0:0:0:2: Attached scsi generic sg1 type 0
[    1.542658] scsi 0:0:16:0: Attached scsi generic sg2 type 3
Can anyone help me?