To check the OBP variables in your Solaris SPARC server and leaving Solaris up and running, you’ll need to use the eeprom command

root@solaris:/ # eeprom
asr-policy=normal
test-args: data not available.
diag-passes=1
local-mac-address?=true
fcode-debug?=false
scsi-initiator-id=7
oem-logo: data not available.
oem-logo?=false
oem-banner: data not available.
oem-banner?=false
ansi-terminal?=true
screen-#columns=80
screen-#rows=34
ttyb-rts-dtr-off=false
ttyb-ignore-cd=true
ttya-rts-dtr-off=false
ttya-ignore-cd=true
ttyb-mode=9600,8,n,1,-
ttya-mode=9600,8,n,1,-
output-device=ttya
input-device=ttya
auto-boot-on-error?=true
error-reset-recovery=sync
load-base=16384
auto-boot?=true
network-boot-arguments: data not available.
boot-command=boot
diag-file: data not available.
diag-device=disk0:a
boot-file: data not available.
boot-device=vx-rootdisk vx-rootmirr
use-nvramrc?=false
nvramrc=devalias vx-rootdisk /pci@1c,600000/scsi@2/disk@0,0:a
devalias vx-rootmirr /pci@1c,600000/scsi@2/disk@3,0:a
security-mode=none
security-password: data not available.
security-#badlogins=0
verbosity=normal
diag-trigger=error-reset power-on-reset
service-mode?=false
diag-script=normal
diag-level=max
diag-switch?=false