"Could not install boot blocks" at the end of installation.

Hello.
I've got problem while installing Open Solaris b.36 (or 'original' Solaris 10).
I'm getting 'could not install boot blocks' after install script copies 
everything t hard-drives.
My configuration is: PII-450, 256, 6GB primary master, CD primary slave, 1GB 
secondary slave.
6GB primary master is used only for /
1GB is only used for swap.

I do remember, that in 2.6 that I was using, there was some X86BOOT slice... ?
 
 
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