Debian Squeeze 6.x on HP DL360gen8 not detecting the raid controller

Debian Squeeze cannot detect RAID controller on HP ProLiant DL360gen8.
In expert mode when installer prompts that it cannot detect hard disk, open a console (Alt+F2, hit Enter) and then type:

# modprobe -r hpsa

# modprobe hpsa hpsa_allow_any=1

First remove the driver if loaded and then load it again with hpsa_allow_any=1 parameter. Here is the result:

[    1.314375] scsi0 : hpsa
[    1.316649] hpsa 0000:02:00.0: RAID              device c0b0t0l0 added.
[    1.316654] hpsa 0000:02:00.0: Direct-Access     device c0b0t0l1 added.
[    1.316827] scsi 0:0:0:0: RAID              HP       P420i            4.66 PQ: 0 ANSI: 5
[    1.316958] scsi 0:0:0:1: Direct-Access     HP       LOGICAL VOLUME   4.66 PQ: 0 ANSI: 5

Now swtich back to installer (Alt+F1) and try again 'detect hard disks'. Now you can partition your raid logical volume.