> Hardware configs:-
> 1. C2D 6850,ASUS P5K Premium/WIFI,4 GB RAM, 250 GB SATA HDD Seagate Barracuda
> 2. C2D 6600,ASUS P5B Deluxe,4 GB RAM,160 GB SATA HDD Seagate Barracuda

> SNV78 install takes about 35-40 minutes, CentOS 5.X -> 15-20 minutes ,
> F8 - 15 minutes. Volume of data extracted to SATA drive managed by
> Intel ICH9(8)R is about 5 GB.

> Looks like NCQ is not yet implemented.

AFAICT, snv78 should support NCQ on ahci.

The ahci.c source contains lots of references to NCQ:

    
http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/uts/common/io/sata/adapters/ahci/ahci.c

And there is CR 6511021, "ahci driver needs to support SATA NCQ",
which was fixed with snv_76:

    http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6511021



I guess what you're observing is just the slowness of the solaris
installer, compared to the installers used on the other platforms...
 
 
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