moving stage4 to the other box

[creaker]

Hi.
I want to move my entire system to sister's box. I packed system into stage4 and unpacked it at destination box. Now I can't to log in neither as root nor as regular user. No errors, just asks for login over and over. When booting in single mode I can login as root, but most of commands fails with "illegal instruction" message. As far as I understood it is a march issue. My system was built with march=native (for Sandy Bridge CPU), but destination box has Core2Duo E8600 CPU that requires march=core2. The most common way to fix the issue is rebuilding entire the system with new march and move new tarball to destination. But it is requires too march time, I have to built it twice (second build for restoring march=native for my box). Is there any way to fix already unpacked tarball? May be some kind of "safe mode" that blocks instructions that not supported by core2duo?

[N8Fear]

You've answered your own question: you try to run sandy-bridge optimized code on a box that doesn't understand that. There's no real way around than.

I see two different options for you:

1) put the drive from the Core2Duo into the Sandy-Bridge box, boot it and rebuild there (just one rebuild, but downtime).

2) extract a stage3 tarball over the stage4 on the Core2Duo and rebuild everything there (this way the Sandy-Bridge box will continue to be usable).

Other than that you won't have much of a choice because it's embedded into the binaries...

[creaker]

yeah, it seems rebuilding all the system is the only option.