Problem: Primary Unit unable to boot with image 9.1(1)
Secondary boots with 9.1(1) and works without any problem
Hardware: ASA5520, 2048 MB RAM, CPU Pentium 4 Celeron 2000 MHz,
Internal ATA Compact Flash, 256MB
Slot 1: ATA Compact Flash, 512MB
BIOS Flash M50FW080 @ 0xfff00000, 1024KB
#Sh tech-support shows no difference between both units.
Thanks for sharing the second attempts and steps that you have taken. I am sure it will help others who have similar issues.
The first time around it might have been corrupted file when you upload it to the primary, that's why it's not booting up at all.
Pls kindly mark the post as answered so others can learn from it. Thank you.