Cool, it "just works". I tried it today using a Rosewill RC-217 4-port SATA PCI card. I was able to create a Hammer volume and copy files to it. Attached is the dmesg:
Copyright (c) 2003-2009 The DragonFly Project.
Copyright (c) 1992-2003 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
The Regents of the University of California. All rights reserved.
DragonFly v2.4.1-RELEASE #14: Wed Sep 30 18:12:31 PDT 2009
root@test28.backplane.com:/usr/obj/usr/src-misc/sys/GENERIC
TSC clock: 1794108240 Hz, i8254 clock: 1193136 Hz
CPU: Intel(R) Pentium(R) 4 CPU 1.80GHz (1794.19-MHz 686-class CPU)
Origin = "GenuineIntel" Id = 0xf24 Stepping = 4
Features=0x3febfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM>
real memory = 804519936 (785664K bytes)
avail memory = 766943232 (748968K bytes)
kbd1 at kbdmux0
Pentium Pro MTRR support enabled
fildesc_drvinit() building stdin, stdout, stderr:
md0: Malloc disk
ACPI: RSDP 0xf6cc0 00014 (v0 ACPIAM)
ACPI: RSDT 0x2ff40000 0002C (v1 A M I OEMRSDT 09000210 MSFT 00000097)
ACPI: FACP 0x2ff40200 00081 (v2 A M I OEMFACP 09000210 MSFT 00000097)
ACPI: DSDT 0x2ff40400 039D5 (v1 DELL DIM 4500 0000010A MSFT 0100000D)
ACPI: FACS 0x2ff50000 00040
ACPI: APIC 0x2ff40300 00054 (v1 A M I OEMAPIC 09000210 MSFT 00000097)
npx0: <math processor> on motherboard
npx0: INT 16 interface
Using XMM optimized bcopy/copyin/copyout
acpi0: <A M I OEMRSDT> on motherboard
acpi0: Power Button (fixed)
Warning: ACPI is disabling APM's device. You can't run both
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x408-0x40b on acpi0
cpu0: <ACPI CPU> on acpi0
cpu_cst0: <ACPI CPU C-State> on cpu0
acpi_button0: <Sleep Button> on acpi0
sio0: configured irq 4 not in bitmap of probed irqs 0
sio0 port 0x3f8-0x3ff irq 4 on acpi0
sio0: type 16550A
ppc0 port 0x378-0x37f irq 7 on acpi0
ppc0: Generic chipset (EPP/NIBBLE) in COMPATIBLE mode
ppbus0: <Parallel port bus> on ppc0
plip0: <PLIP network interface> on ppbus0
lpt0: <Printer> on ppbus0
lpt0: Interrupt-driven port
ppi0: <Parallel I/O> on ppbus0
atkbdc0: <Keyboard controller (i8042)> port 0x64,0x60 irq 1 on acpi0
atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0
kbd0 at atkbd0
pcib0: <Host to PCI bridge> pcibus 0 on motherboard
pir0: <PCI Interrupt Routing Table: 8 Entries> on motherboard
pci0: <PCI bus> on pcib0
agp0: <Intel 82845 host to AGP bridge> mem 0xf8000000-0xfbffffff at device 0.0 on pci0
pcib1: <PCI-PCI bridge> at device 1.0 on pci0
pci1: <PCI bus> on pcib1
vgapci0: <VGA-compatible display> port 0xc800-0xc8ff mem 0xff7fc000-0xff7fffff,0xf0000000-0xf3ffffff irq 11 at device 0.0 on pci1
uhci0: <Intel 82801DB (ICH4) USB controller USB-A> port 0xe800-0xe81f irq 11 at device 29.0 on pci0
usb0: <Intel 82801DB (ICH4) USB controller USB-A> on uhci0
usb0: USB revision 1.0
uhub0: <Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1> on usb0
uhub0: 2 ports with 2 removable, self powered
uhci1: <Intel 82801DB (ICH4) USB controller USB-B> port 0xe880-0xe89f irq 3 at device 29.1 on pci0
usb1: <Intel 82801DB (ICH4) USB controller USB-B> on uhci1
usb1: USB revision 1.0
uhub1: <Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1> on usb1
uhub1: 2 ports with 2 removable, self powered
uhci2: <Intel 82801DB (ICH4) USB controller USB-C> port 0xec00-0xec1f irq 5 at device 29.2 on pci0
usb2: <Intel 82801DB (ICH4) USB controller USB-C> on uhci2
usb2: USB revision 1.0
uhub2: <Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1> on usb2
uhub2: 2 ports with 2 removable, self powered
pci0: <serial bus, USB> (vendor 0x8086, dev 0x24cd) at device 29.7 irq 9
pcib2: <PCIBIOS PCI-PCI bridge> at device 30.0 on pci0
pci2: <PCI bus> on pcib2
atapci0: <SiI 3124 SATA300 controller> port 0xdc00-0xdc0f mem 0xff9f0000-0xff9f7fff,0xff9ffc00-0xff9ffc7f irq 10 at device 1.0 on pci2
ata2: <ATA channel 0> on atapci0
ad4: 190782MB <SAMSUNG SP2004C VM100-33> at ata2-master SATA300
ata3: <ATA channel 1> on atapci0
ata4: <ATA channel 2> on atapci0
ata5: <ATA channel 3> on atapci0
em0: <Intel(R) PRO/1000 Network Connection 82540EM 6.9.6> port 0xd880-0xd8bf mem 0xff9a0000-0xff9bffff,0xff9c0000-0xff9dffff irq 11 at device 12.0 on pci2
em0: MAC address: 00:07:e9:0a:5a:1f
isab0: <PCI-ISA bridge> at device 31.0 on pci0
isa0: <ISA bus> on isab0
atapci1: <Intel ICH4 UDMA100 controller> port 0xffa0-0xffaf,0x376,0x170-0x177,0x3f6,0x1f0-0x1f7 at device 31.1 on pci0
ata0: <ATA channel 0> on atapci1
ad0: 38166MB <Seagate ST340014A 3.06> at ata0-master UDMA100
ata1: <ATA channel 1> on atapci1
acd0: DVDROM <LITEON DVD-ROM LTD163/GDHF> at ata1-master UDMA33
pci0: <serial bus, SMBus> (vendor 0x8086, dev 0x24c3) at device 31.3 irq 11
pci0: <multimedia, audio> (vendor 0x8086, dev 0x24c5) at device 31.5 irq 11
pmtimer0 on isa0
fdc0: ready for input in output
fdc0: cmd 3 failed at out byte 1 of 3
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
sio2: can't drain, serial port might not exist, disabling
ppc1: cannot reserve I/O port range
ip: MPSAFE
arp: MPSAFE
CAM: Configuring 6 busses
CAM: finished configuring all busses (0 left)
cd0 at ata5 bus 0 target 0 lun 0
cd0: <LITEON DVD-ROM LTD163 GDHF> Removable CD-ROM SCSI-0 device
cd0: 33.000MB/s transfers
cd0: cd present [256858 x 2048 byte records]
Mounting root from hammer:serno/3JX139HT.s1d
tryroot serno/3JX139HT.s1d
Mounting devfs
