You ran showplatform in the system controller and the E25k domain shows the status In Recovery

Domain configurations:
======================
Domain ID Domain Tag Solaris Nodename Domain Status
A – – Powered Off
B – – Powered Off
C – – Powered Off
D – – Powered Off
E domain5 – In Recovery
F – – Powered Off
G – – Powered Off
H – – Powered Off
I – – Powered Off
J – – Powered Off
K – – Powered Off
L – – Powered Off
M – – Powered Off
N – – Powered Off
O – – Powered Off
P – – Powered Off
Q – – Powered Off
R – – Powered Off

To check the progress of why it is taking a long time to boot the domain, check the post process running

roo@systemcontrollern1:~ # ps -ef | grep post
sms-svc 5398 198 0 15:48:02 pts/2 0:00 grep post
sms-dsmd 27458 26817 39 15:34:33 ? 3:14 /opt/SUNWSMS/SMS1.6/bin/hpost -d E -Q

roo@systemcontrollern1:~ # truss -p 27458

• Hardware
• Solaris