Cisco ASA 5550 stuck on boot from tftp

Question

I have a cisco ASA 5550 firewall. I lost my image.

I tried to boot from tftp using rommon to upload new image but it doesn't work, now i want to get back to boot from flash but i'm stuck with the tftp.

When i change the confreg it restarts immediately, it doesn't wait for sync command that saves the configuration to the nv-ram, so all changes are lost ad it starts again in tftp.

What can cause this this problem, what should i try?

This is how i proceed :

rommon #0> confreg

Current Configuration Register: 0x00000010
Configuration Summary:
  boot TFTP image

Do you wish to change this configuration? y/n [n]: y
enable boot to ROMMON prompt? y/n [n]:
enable TFTP netboot? y/n [n]:
enable Flash boot? y/n [n]: y
select specific Flash image index? y/n [n]: y/n [n]:
go to ROMMON prompt if netboot fails? y/n [n]:
enable passing NVRAM file specs in auto-boot mode? y/n [n]:
disable display of BREAK or ESC key prompt during auto-boot? y/n [n]:

Current Configuration Register: 0x00000001
Configuration Summary:
  boot default image from Flash

Update Config Regist

Booting system, please wait...

Answer 1

I found the problem!

The firewall has 4 rams (each of 1gb).

I started with two rams inserted and changed the configuration and it worked, the firewall did not restart.

So there is one failing ram. Now we ordered new one to replace it.