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  • Works fine in Linux, fast, no extra drivers needed

    posted by tillos on 07/09/2010
    0

    Involvement:Expert (understands the inner workings) - Ownership:less than 1 day

    Pros:

    It is plug and play for Ubuntu (actually any Linux distribution should work). I did not need the CD.

    I get consistently over 70MB/s for my external disk while connecting to USB2.0 would achieve up to 25MB/s (variable, depends on CPU load and size of files).

    lspci reports:

    sudo lspci -vvv -nn -s 14:00.0

    14:00.0 SATA controller [0106]: JMicron Technology Corp. JMB360 AHCI Controller [197b:2360] (rev 02) (prog-if 01)

    Subsystem: JMicron Technology Corp. JMB360 AHCI Controller [197b:2360]

    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 19

    Region 0: I/O ports at 9000 [size=8]

    Region 1: I/O ports at 8000 [size=4]

    Region 2: I/O ports at 7000 [size=8]

    Region 3: I/O ports at 6000 [size=4]

    Region 4: I/O ports at 5000 [size=16]

    Region 5: Memory at fc000000 (32-bit, non-prefetchable) [size=8K]

    Capabilities: [68] Power Management version 2

    Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot+,D3cold-)

    Status: D0 PME-Enable- DSel=0 DScale=0 PME-

    Capabilities: [50] Express (v1) Legacy Endpoint, MSI 01

    DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s <64ns, L1 <1us

    ExtTag- AttnBtn- AttnInd- PwrInd- RBE- FLReset-

    DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported-

    RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop-

    MaxPayload 128 bytes, MaxReadReq 512 bytes

    DevSta: CorrErr+ UncorrErr- FatalErr- UnsuppReq+ AuxPwr- TransPend-

    LnkCap: Port #1, Speed 2.5GT/s, Width x1, ASPM L0s, Latency L0 <1us, L1 <16us

    ClockPM- Suprise- LLActRep- BwNot-

    LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk+

    ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-

    LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-

    Kernel driver in use: ahci

    Kernel modules: ahci

    hdparm reports:

    hdparm -T -t /dev/sdb

    /dev/sdb:

    Timing cached reads: 3314 MB in 2.00 seconds = 1658.28 MB/sec

    Timing buffered disk reads: 222 MB in 3.00 seconds = 74.00 MB/sec

    Cons:

    I did not find any.

    I'll write in the comments if it breaks down too soon.

    OtherThoughts:

    I am using this with http://www.dealextreme.com/details.dx/sku.9288 which is a SATA to eSata cable.

    I provide power to the disk with a special SATA adapter.

    I should get an eSata to eSata cable so that I can connect it with my new eSata enclosure. Now it's laying on my desk. Such a cable is http://www.dealextreme.com/details.dx/sku.29358

    Bottomline:

    It is worth to invest in eSata for your external storage. USB 2.0 is not fast enough, and the throughput highly depends on the size of files, and the CPU load.

    I wish the packaging mentioned that it supports Linux.

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