problem during installion

Hi,
I made two group the first one consists of two logic drivers (raid 1), the other one consists of four logic drivers raid 5.
when I tried to install tru64 Unix v5.1 I received an error which is:-

here is my show dev:-

dqa00.0.0.105.0 DQA0 cd-224E 9.5B
dra0.0.0.0.7.1 DRA0 2 Member RAID 1
dra1.0.0.0.7.1 DRA1 2 Member RAID 1
dra2.0.0.0.7.1 DRA2 4 Member RAID 5
dra3.0.0.0.7.1 DRA3 4 Member RAID 5
dra4.0.0.0.7.1 DRA4 4 Member RAID 5
dra5.0.0.0.7.1 DRA5 4 Member RAID 5
dva0.0.0.0.0 DVA0
eia.0.0.9.1 EIA 00-50-8B-AC-0E-F3
pka0.7.0.6.0 PKA0 SCSI Bus ID 7
pkb0.7.0.106.0 PKB0 SCSI Bus ID 7
pkc0.7.0.8.0 PKC0 SCSI Bus ID 7 5.57

show config:-

COMPAQ AlphaServer DS20E 833 MHz
SRM Console: 7.3-1
PALcode: OpenVMS PALcode V1.90-79, Tru64 UNIX PALcode V1.92-74
.
.
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after I manage to install UNIX successfully I want to use addvol command to merge dra2, dra3,dra4 and dra5.

I use KZPAC AC-FX controller and use the utility ra200rcu.

The version of Tru64 Unix which I am using to load is Compaq Tru64 UNIX V5.1.

could you help me please.

bye.