I just purchased an ARC-1880ix-12 for my Mac Pro to take the place of a (non)working RocketRAID 640 (functionally identical to the 644 eSATA version, but the Mac drivers refuse to see its identical components due to HPT refusing to put in four measly vendor/system IDs), and I'm having a few issues with this card and my setup. I'll give the system setup first for reference: Code: Hardware Overview: Model Name: Mac Pro Model Identifier: MacPro1,1 Processor Name: Dual-Core Intel Xeon Processor Speed: 2.66 GHz Number Of Processors: 2 Total Number Of Cores: 4 L2 Cache (per processor): 4 MB Memory: 7 GB Bus Speed: 1.33 GHz Boot ROM Version: MP11.005C.B08 SMC Version (system): 1.7f10 Mac OS Version: 10.6.8 ATI Radeon HD 5870: Name: ATY,Langur Type: Display Controller Driver Installed: Yes MSI: Yes Bus: PCI Slot: Slot-1 Vendor ID: 0x1002 Device ID: 0x6898 Subsystem Vendor ID: 0x106b Subsystem ID: 0x00d0 Revision ID: 0x0000 Link Width: x16 Link Speed: 2.5 GT/s ATI Radeon HD 5870: Name: ATY,LangurParent Type: ATY,LangurParent Driver Installed: No MSI: No Bus: PCI Slot: Slot-1 Vendor ID: 0x1002 Device ID: 0xaa50 Subsystem Vendor ID: 0x106b Subsystem ID: 0xaa50 Revision ID: 0x0000 Link Width: x16 Link Speed: 2.5 GT/s pci17d3,1880: Type: RAID Controller Driver Installed: Yes MSI: No Bus: PCI Slot: Slot-4 Vendor ID: 0x17d3 Device ID: 0x1880 Subsystem Vendor ID: 0x17d3 Subsystem ID: 0x1880 Revision ID: 0x0005 Link Width: x4 Link Speed: 2.5 GT/s PCI-E Card placement: Slot 4: ARC-1880ix-12 Slot 3: Empty Slot 2: Empty; bracket space used for eSATA conversion bracket Slot 1: Radeon HD5870 The first issue is this that my card shows up as only x4 for its link width. I saw another thread on this, but as I have a new motherboard battery, that isn't going to fix my problem here. When I have profile #1 in the expansion slot utility set (x8, x1, x1, x16), my 1880 shows up as x4 (running at maximum speed). But if I choose say, profile #2 (x4, x4, x1, x16), the 1880 shows up as x4 (running below maximum speed) and the last four lanes of the x8 connection are highlighted in yellow. Seems kind of backwards to me there. The second issue is that the only drive that shows up is my physical platter HD (WD 1 TB Green HD). I have the following HDs installed in my system: Bay 1: Vertex 3 120 GB SSD Bay 2: WD 1TB Green HD) Bay 3: Empty (see note below for why) Bay 4: OWC 40 GB Mercury Pro SSD (SF-1200) Top ODD Bay: Pioneer DVR-1806 Bottom ODD Bay: Intel 80 GB X-25M Gen 2 SSD (boot drive) [connected to ODD_SATA_1] External HD Dock (Nexstar) connected via eSATA running from eSATA PCI bracket connected to ODD_SATA_2: Dock contains secondary WD 1 TB Green HD, inactive unless cloning to drive for backup purposes. Obviously my Intel 80 GB shows up, as it's on the ODD port and boots just fine (oddly enough the ODD ports boot faster than the SATA backplane ports for the internal bays ever did). Special Note: I have my 1880 connected to the internal bays via MaxUpgrades SAS/SATA Link coupler. My internal backplanes are no longer connected to the ICH SAS port on the motherboard, as my intention was to make these ports natively 6Gbps/SATA3 (seeing as they are merely physical wire connections with no bridge chipset inline, this should not have been an issue). Regarding Bay 3 as noted above, it's empty because the OCZ Summit 60 GB SSD hangs the controller for some reason. It just does not seem to like the Barefoot controller in that SSD. The Finder never loads with that drive in any of the bays. If I physically remove the drive (the card is capable of hot swapping, unlike the Intel ICH onboard chipset), then the desktop magically appears and all is good other than no drives showing up besides the physical platter HD. The OWC SSD SMART status showed a constant 0°C temperature (obviously impossible), and the OCZ showed a constant 128°C temperature (also impossible as that'd melt any BGA solder joints) - these readings were taken before the 1880 was installed. OS X never balked at this, but perhaps the Areca card does? The 1880 is unable to see any of my SSDs at all (each enclosed in an IcyDock, and since the IcyDock enclosures do not use bridge chipsets, they should be transparent to the controller). I'm kind of at a loss at this point. I've already flashed the firmware from the CD and the FTP site listed in another thread by nanofrog, as well as the EBC ROM for the Mac Pro that was on the CD (it's byte for byte identical to the FTP site version, meaning Areca hasn't bothered to make an update for the Mac Pro EFI/EBC ROM). I can access and configure the RAID controller itself, but cannot find any drives at all. The card is currently set for JBOD mode, and there are no RAID sets to manage, so I can't delete, expand, modify, or configure a RAID set, nor can I even attempt to make a pass-through disk (not that I'd want to if I intend to make use of the SATA3 speed capabilities of the card). As expected, this card introduces a roughly 30 second bootup delay, so getting to the desktop does not happen until the card's fully booted up, and same with the EFI boot selection screen. I do have rEFIt installed, and was able to access the McBIOS utility built into the card to double check the options I had set in the ArcHTTP web management server pages. So does anybody have any clue why the 1880 shows up as x4 instead of x8, or why I can't get ANY SSD to even be seen by the card? That's kind of a showstopper since I got this card specifically because I wanted SATA3 speeds with my Vertex 3 and enough headroom to get the max possible speed from my OWC 40 GB SSD, which can go faster than the ICH chipset on my Mac Pro's mobo can handle. I cannot boot to Lion as my OWC SSD has my Lion boot partition. My drives are set up individually as follows: Intel 80 GB SSD: 10.6.8 boot drive OWC 40 GB SSD: 10.7.2 boot drive (not a typo: I'm an ADC member) OCZ Summit 60 GB SSD: Empty; formatted as NTFS for purposes of cloning my WinXP Pro32 boot partition to it Vertex 3 120 GB SSD: Games folder (WoW, emulators) WD 1TB HD: OS Clone partition of Intel SSD data, bootcamp partition, main downloads partition HD Dock: WD 1TB HD as backup of internal 1 TB HD.