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How can I enable "USB Attached SCSI"? Is it part of a kernel module which I do not load per default? I need it for a PCIe-card with an ASM1051E chip.

According to this: http://en.wikipedia.org/wiki/USB_Attached_SCSI that chip does not support USB attached SCSI.

It seems to me I did not pick out the real problem. The USB chip sits on an internal PCIe-card which is connected to an eSATA/USB3/USB2 PCIe-card with two external multi-ports. Using an external USB3 harddrive on one of these ports gives ~35MB/s (read). This is more or less USB2 speed. But if I connect the same harddisk to another USB3 port (different chip) reading speed is about ~125MB/s which is quite acceptable. But maybe the first USB chip (ASMedia) is not the problem...

If I scan for PCI devices I get the following info:

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84:00.0 SATA controller: ASMedia Technology Inc. ASM1062 Serial ATA Controller (rev 01) (prog-if 01 [AHCI 1.0])
        Subsystem: ASMedia Technology Inc. Device 1060
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 0, Cache Line Size: 64 bytes
        Interrupt: pin A routed to IRQ 105
        Region 0: I/O ports at e050 [size=8]
        Region 1: I/O ports at e040 [size=4]
        Region 2: I/O ports at e030 [size=8]
        Region 3: I/O ports at e020 [size=4]
        Region 4: I/O ports at e000 [size=32]
        Region 5: Memory at fbc10000 (32-bit, non-prefetchable) [size=512]
        Expansion ROM at fbc00000 [disabled] [size=64K]
        Capabilities: [50] MSI: Enable+ Count=1/1 Maskable- 64bit-
                Address: fee00118  Data: 0000
        Capabilities: [78] Power Management version 3
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
        Capabilities: [80] Express (v2) Legacy Endpoint, MSI 00
                DevCap: MaxPayload 512 bytes, PhantFunc 0, Latency L0s <1us, L1 <8us
                        ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset-
                DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
                        RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop+
                        MaxPayload 256 bytes, MaxReadReq 512 bytes
                DevSta: CorrErr+ UncorrErr- FatalErr- UnsuppReq- AuxPwr- TransPend-
                LnkCap: Port #1, Speed 5GT/s, Width x1, ASPM L0s, Latency L0 <512ns, L1 <2us
                        ClockPM- Surprise- LLActRep- BwNot-
                LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk+
                        ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
                LnkSta: Speed 5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
                DevCap2: Completion Timeout: Range ABC, TimeoutDis+, LTR-, OBFF Not Supported
                DevCtl2: Completion Timeout: 1ms to 10ms, TimeoutDis-, LTR-, OBFF Disabled
                LnkCtl2: Target Link Speed: 5GT/s, EnterCompliance- SpeedDis-
                         Transmit Margin: Normal Operating Range, EnterModifiedCompliance- ComplianceSOS-
                         Compliance De-emphasis: -6dB
                LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete-, EqualizationPhase1-
                         EqualizationPhase2-, EqualizationPhase3-, LinkEqualizationRequest-
        Capabilities: [100 v1] Virtual Channel
                Caps:   LPEVC=0 RefClk=100ns PATEntryBits=1
                Arb:    Fixed- WRR32- WRR64- WRR128-
                Ctrl:   ArbSelect=Fixed
                Status: InProgress-
                VC0:    Caps:   PATOffset=00 MaxTimeSlots=1 RejSnoopTrans-
                        Arb:    Fixed- WRR32- WRR64- WRR128- TWRR128- WRR256-
                        Ctrl:   Enable+ ID=0 ArbSelect=Fixed TC/VC=01
                        Status: NegoPending- InProgress-
        Kernel driver in use: ahci


The last line says: "Kernel driver in use: ahci". But in mcc the chip is listed under unknown hardware and it is said that the used module is "unknown". What can I do?