Instal Sun Solaris on Sparc Machine

Hello all,

I just bought Sparc 20 used machine and trying to install 2.7 on it.
When I booted up and type
boot cdrom I get following msg:

Boot device: /iommu/sbus/espdma@f, 400000/esp@f, 800000/sd@6,0:d File and args:
Can’t open boot device

I ran probe-scsi-all command and got following result:
/iommu/sbus/espdma@f, 400000/esp@f, 800000
Target 3
Unit 0 Disk Conner Cfp1080e SUN1.055150lb2x
Target 4 (I changed it from 6 to 4)
Unit 0 Removable Read only device TOSHIBA CD-RomXm-4101TA006401/06/94

Here are couple things I get by using printenv command, there are as follows:

ttyb-ignore-cd true true
scsi-initiator-id 7 7 (Why 7 when
auto-boot false false
diag-file net net
boot-device cdrom Disk net

Any help will be appreciated