Date: Sun, 1 Jul 2007 16:49:39 -0400 From: "Constantine A. Murenin" <mureninc@gmail.com> To: "Ravi Pokala" <rp_freebsd@mac.com> Cc: freebsd-hardware@freebsd.org Subject: Re: Looking for a motherboard with lots of SATA ports, supported in 6.2-STABLE Message-ID: <f34ca13c0707011349g7bacea3el5cd7e4e79695b0fa@mail.gmail.com> In-Reply-To: <C2AD4F18.1F5DE%rp_freebsd@mac.com> References: <467E2392.6010109@fluffles.net> <C2AD4F18.1F5DE%rp_freebsd@mac.com>
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On 01/07/07, Ravi Pokala <rp_freebsd@mac.com> wrote: > I am leery of any SATA controller that I've never heard of, and I feared > that perhaps this was something I already knew from work and didn't like. > Some googling suggests it's actually a JMicron controller that is decent and > fairly well supported by 6.2-STABLE. Can anyone confirm that? Yes, JMicron controllers are a pretty standard feature of most modern Intel-based boards. Mine works without any problems: ... atapci0: <JMicron JMB363 SATA300 controller> port 0xbc00-0xbc07,0xb880-0xb883,0xb800-0xb807,0xb480-0xb483,0xb400-0xb40f mem 0xff6fe000-0xff6fffff irq 16 at device 0.0 on pci3 atapci0: [ITHREAD] atapci0: AHCI Version 01.00 controller with 2 ports detected ata2: <ATA channel 0> on atapci0 ata2: [ITHREAD] ata3: <ATA channel 1> on atapci0 ata3: [ITHREAD] ata4: <ATA channel 2> on atapci0 ata4: [ITHREAD] ... ad6: 157066MB <Hitachi HDS721616PLA380 P22OAB3A> at ata3-master SATA300 acd0: DVDR <ASUS DRW-1814BL/1.10> at ata4-master UDMA66 ... > I do find it odd that they would use discrete chips for the NIC and extra > SATA ports, when the chipset contains both. Mainboard manufacturers usually like to offer Parallel ATA, which is not available in newest Intel chipsets, hence there is a need for an external chip. I guess, Serial ATA comes as a bonus with such external chips, and also provides the user with more choice on which controller to use. Also, I don't think ICH8 southbridge has integrated Ethernet networking capabilities -- these are usually added as an external chip, connected by PCI Express, as the following diagram illustrates: <URL:http://www.intel.com/products/chipsets/g965/prod_brief.pdf>. Cheers, Constantine.
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