Just a happy user report. Hopefully, this is of use for those searching the archives.
As it seems, the LSI Logic MegaRAID SATA 150-4 seems another name for the LSI/Symbios 523 listed in the HCL. For completeness, I attached a dmesg output below. The card is currently sitting in a 32bit slot and appears to work fine. Performance on 3.6 (i386) is fine, although -current provided better throughput for me. Given the work done on ami(4) (see the CVS logs), this is hardly surprising. The only problem I encountered was easily solved. At first the card was much slower in transfers (both under 3.6 and -current) than a regular drive (by a factor 20). As it turned out, write caching was not enabled on all of the physical drives in the array due to a firmware bug. Although checking (and correcting) the write cache settings on the drives solved this problem, it is also possible to upgrade the firmware on the card (presently 713N). It seems there are still cards on the market with older firmwares in them as I bought my cards a few weeks ago (having 713G in them). As soon as I can get my hands on an Opterons, I'll try out amd64 with it (in a 64bit slot). Cheers, Rogier OpenBSD 3.6 (GENERIC) #59: Fri Sep 17 12:32:57 MDT 2004 [EMAIL PROTECTED]:/usr/src/sys/arch/i386/compile/GENERIC cpu0: Intel(R) Celeron(R) CPU 2.40GHz ("GenuineIntel" 686-class) 2.40 GHz cpu0: FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,SBF,PNI,MWAIT,CNXT-ID real mem = 534548480 (522020K) avail mem = 480858112 (469588K) using 4278 buffers containing 26828800 bytes (26200K) of memory mainbus0 (root) bios0 at mainbus0: AT/286+(00) BIOS, date 09/29/04, BIOS32 rev. 0 @ 0xf0010 apm0 at bios0: Power Management spec V1.2 apm0: AC on, battery charge unknown pcibios0 at bios0: rev 2.1 @ 0xf0000/0x10000 pcibios0: PCI IRQ Routing Table rev 1.0 @ 0xf3d00/224 (12 entries) pcibios0: PCI Interrupt Router at 000:31:0 ("Intel 82801EB/ER LPC" rev 0x00) pcibios0: PCI bus #1 is the last bus bios0: ROM list: 0xc0000/0xa200! 0xca800/0x2200 cpu0 at mainbus0 pci0 at mainbus0 bus 0: configuration mode 1 (no bios) pchb0 at pci0 dev 0 function 0 "Intel 82865G/PE/P CPU-I/0-1" rev 0x02 vga1 at pci0 dev 2 function 0 "Intel 82865G Video" rev 0x02: aperture at 0xf0000000, size 0x8000000 wsdisplay0 at vga1: console (80x25, vt100 emulation) wsdisplay0: screen 1-5 added (80x25, vt100 emulation) uhci0 at pci0 dev 29 function 0 "Intel 82801EB/ER USB" rev 0x02: irq 11 usb0 at uhci0: USB revision 1.0 uhub0 at usb0 uhub0: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1 uhub0: 2 ports with 2 removable, self powered uhci1 at pci0 dev 29 function 1 "Intel 82801EB/ER USB" rev 0x02: irq 5 usb1 at uhci1: USB revision 1.0 uhub1 at usb1 uhub1: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1 uhub1: 2 ports with 2 removable, self powered uhci2 at pci0 dev 29 function 2 "Intel 82801EB/ER USB" rev 0x02: irq 10 usb2 at uhci2: USB revision 1.0 uhub2 at usb2 uhub2: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1 uhub2: 2 ports with 2 removable, self powered uhci3 at pci0 dev 29 function 3 "Intel 82801EB/ER USB" rev 0x02: irq 11 usb3 at uhci3: USB revision 1.0 uhub3 at usb3 uhub3: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1 uhub3: 2 ports with 2 removable, self powered ehci0 at pci0 dev 29 function 7 "Intel 82801EB/ER USB" rev 0x02: irq 9 ehci0: EHCI version 1.0 ehci0: companion controllers, 2 ports each: uhci0 uhci1 uhci2 uhci3 usb4 at ehci0: USB revision 2.0 uhub4 at usb4 uhub4: Intel EHCI root hub, class 9/0, rev 2.00/1.00, addr 1 uhub4: 8 ports with 8 removable, self powered ppb0 at pci0 dev 30 function 0 "Intel 82801BA AGP" rev 0xc2 pci1 at ppb0 bus 1 ami0 at pci1 dev 1 function 0 "Symbios Logic MegaRAID" rev 0x01: irq 10 LSI 523/64b/lhc ami0: FW 713N, BIOS vG119, 64MB RAM ami0: 1 channels, 0 FC loops, 1 logical drives scsibus0 at ami0: 40 targets sd0 at scsibus0 targ 0 lun 0: <AMI, Host drive #00, > SCSI2 0/direct fixed sd0: 455808MB, 58107 cyl, 255 head, 63 sec, 512 bytes/sec, 933494784 sec total hifn0 at pci1 dev 2 function 0 "Hifn 7955/7954" rev 0x00: LZS 3DES ARC4 MD5 SHA1 RNG AES PK, 32KB dram, irq 3 fxp0 at pci1 dev 8 function 0 "Intel PRO/100 VE" rev 0x01: irq 11, address 00:11:11:9d:0a:de inphy0 at fxp0 phy 1: i82562ET 10/100 media interface, rev. 0 ichpcib0 at pci0 dev 31 function 0 "Intel 82801EB/ER LPC" rev 0x02 pciide0 at pci0 dev 31 function 1 "Intel 82801EB/ER IDE" rev 0x02: DMA, channel 0 configured to compatibility, channel 1 configured to compatibility atapiscsi0 at pciide0 channel 0 drive 0 scsibus1 at atapiscsi0: 2 targets cd0 at scsibus1 targ 0 lun 0: <PHILIPS, CDD3610 CD-R/RW, 3.01> SCSI0 5/cdrom removable cd0(pciide0:0:0): using PIO mode 0, DMA mode 1 wd0 at pciide0 channel 1 drive 0: <QUANTUM FIREBALL ST3.2A> wd0: 16-sector PIO, LBA, 3079MB, 6306048 sectors wd0(pciide0:1:0): using PIO mode 4, Ultra-DMA mode 2 pciide1 at pci0 dev 31 function 2 "Intel 82801EB SATA" rev 0x02: DMA, channel 0 configured to native-PCI, channel 1 configured to native-PCI pciide1: using irq 10 for native-PCI interrupt wd1 at pciide1 channel 0 drive 0: <HDS722580VLSA80> wd1: 16-sector PIO, LBA48, 78533MB, 160836480 sectors wd1(pciide1:0:0): using PIO mode 4, Ultra-DMA mode 5 "Intel 82801EB/ER SMBus" rev 0x02 at pci0 dev 31 function 3 not configured isa0 at ichpcib0 isadma0 at isa0 pckbc0 at isa0 port 0x60/5 pckbd0 at pckbc0 (kbd slot) pckbc0: using irq 1 for kbd slot wskbd0 at pckbd0: console keyboard, using wsdisplay0 pcppi0 at isa0 port 0x61 midi0 at pcppi0: <PC speaker> sysbeep0 at pcppi0 lpt0 at isa0 port 0x378/4 irq 7 npx0 at isa0 port 0xf0/16: using exception 16 pccom0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo fdc0 at isa0 port 0x3f0/6 irq 6 drq 2 fd0 at fdc0 drive 0: 1.44MB 80 cyl, 2 head, 18 sec biomask ff65 netmask ff6d ttymask ffef pctr: user-level cycle counter enabled dkcsum: sd0 matched BIOS disk 82 dkcsum: wd0 matched BIOS disk 80 dkcsum: wd1 matched BIOS disk 81 root on wd0a rootdev=0x0 rrootdev=0x300 rawdev=0x302 -- If you don't know where you're going, any road will get you there.