RH 7.1 installation on PWS 500a

["Ted Lufoma" <lufomat coppernet zm>]

Hell,
Iam unable to boot the RedHat CD from SRM console mode, and
beloow is what am getting;

>>> show dev
dka0.0.0.107.0            DKA0        Toshiba CDROM XM-62    1110
dkc0.0.001004.0        DKC0                            RZ1CB-BS        0818
dkc200.2.0.1004.0     DKC200                       RZ2DC-PA        5520
dkc400.4.0.1004.0     DKC400                       RZ4DC-PA        5520
dva0.0.0.0.1                DVA0
mkc300.3.0.1004.0    MKC300                        TL209                0173
ewa0.0.0.3.0                EWA0                           00-00-F8-76-25-56
pkc0.7.0.1004.0          PKC0                             SCSI bUS ID 75.27
pqa0.0.0.107.0            PQA0                            PCI EIDE
pqb0.0.0.107.0            PQB0                            PCI EIDE

>>boot dka0 -file kernels/vmlinux.gz -flags "root=/dev/scd0
initrd=images/ramdisk.img"

The boot command gives me the following error

aboot:  no disklabel found
ISO:  Max Size: 332353  Log zone size:  2048
ISO:  First datazone: 28  Root inode number 57344
aboot: loading compressed kernels/vmlinux.gz ...

 unzip: crc error
aboot: loading uncompressed kernels/vmlinux.gz
welcome to aboot 0.7
aboot>

Please advise.

Ted.