Did the BIOS update help ? It was looking like one of 3 possibilities - "HBA" firmware/BIOS, drive firmware or the Solaris ahci(7D) driver - or some incompaibility between them.
Looking at the manpage for ahci, I see the NOTES indicate that the HBA mode can usually be changed in the BIOS between legacy & SATA (IDE & AHCI). If performance is still miserable, it might be worth trying the other mode and Solaris will use a different HBA driver. Drive firmware is a bit of a long shot, but it may be worth trying a non-WD drive if you have one handy. Can you post iostat -xn for the dd test to the raw device ? HTH Rocky This message posted from opensolaris.org _______________________________________________ perf-discuss mailing list [email protected]
