Date: Tue, 09 Nov 2010 14:32:24 -0500 From: dieterbsd@engineer.com To: freebsd-hardware@freebsd.org Subject: Re: 12 SATA ports via PCI-X slots Message-ID: <8CD4E5BF8456212-978-828@web-mmc-d02.sysops.aol.com>
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>> And I just noticed on the Newegg.com photos of the AOC-SAT2-MV8 that >> for disk activity there doesn't seem to be a ground pin for each=20 disk, >> just one common ground pin. Which, for me at least, sucks because all >> of the disk activity LEDs in my chassis have their own ground wire=20 and >> are terminated in duplex headers, not the split headers. > > - The optional BIOS ROMs don't play nice with other extension cards=20 you > might have on a busy system. You might want to disable them and leave > the disk initialization to FreeBSD. How does one disable the BIOS ROMs on expansion cards? Is this specific to the AOC-SAT2-MV8, or can you do this on the mainboard? Sounds like the sort of thing they would hide in the mainboard BIOS somewhere. I have a couple of JMB363 cards that I think would work better without the BIOS ROMs. Unfortunately I have never run across any sort of "turn off expansion card BIOS ROM" option. If at all possible get cards that have NCQ support in the driver (e.g. ahci(4) or siis(4)). Write performance is 10-13 times as fast with NCQ, and the system doesn't get clogged up with outstanding work.
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