PCIe SATA card shows up as parallel SCSI ?

Discussion in 'Mac Pro' started by therishi, Mar 11, 2010.

  1. therishi macrumors newbie

    Joined:
    Mar 11, 2010
    #1
    Hi

    I've installed a (cheap) DELOCK PCIe SATA controller (product#70157) and connected a Sandberg SATA docking station (very low cost too,) to be able to store early raw resource files from photo and video jobs on WD internal SATA harddrives (All in all a good Tb/$ rate for storing big sets of resc files). I've installed the latest Silicon non-raid driver.
    HD mounts and works, but I'm wondering why this setup is defined as a SCSI connection in the "About this Mac" overview:

    Readout from "PCI cards":

    pci1095,3132:

    Type: Other Mass Storage Controller
    Driver Installed: Yes
    Bus: PCI
    Slot: Slot-3
    Vendor ID: 0x1095
    Device ID: 0x3132
    Subsystem Vendor ID: 0x1095
    Subsystem ID: 0x3132
    Revision ID: 0x0001
    Link Width: x1
    Link Speed: 2.5 GT/s

    In "Parallel SCSI":

    SCSI Parallel Domain 0:

    Initiator Identifier: 255

    SCSI Target Device @ 15:

    Manufacturer: WDC WD15
    Model: EADS-00P8B0
    Revision: 01.0
    SCSI Target Identifier: 15
    SCSI Device Features:
    SCSI Initiator/Target Features:
    Peripheral Device Type: 0

    - - -

    Everything works - I'm just wondering why it doesn't show up as SATA or serial ATA - and works a bit faster.
    Around 40 to 80 Mb/s

    If anyone has experience and can clarify I'll be grateful.
    Thanx

    Rishi
     
  2. PaulD-UK macrumors member

    Joined:
    Oct 23, 2009
    #2
    Hi
    Its a legacy strategy for adding hard drive controller channels - to avoid conflicts with existing channels/controllers. If the PCI card emulates a SCSI controller it doesn't conflict with existing IDE/SATA controllers.

    So to this day very cheap cards still do this. I saves the manufacturer actually writing a proper SATA driver - which of course 'name' manufacturers like Sonnet/LaCie/Areca etc do. My older Highpoint PCI-X SATA HBAs in my G5s report themselves as SCSI, but they work fine.
     
  3. therishi thread starter macrumors newbie

    Joined:
    Mar 11, 2010
    #3
    Thanx Paul - Learning something everyday :)


     

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