Re: directIO on usb mass storage/scsi device in 2.4 kernel

[Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>]

On Thu, 13 Dec 2007, syed khader wrote:

> hi 
>   I am having problems getting directIO(file write
> using O_DIRECT) work on scsi device(seagate usb hard
> drive) on an ARM platform.
>  I really dont know if it is a sg driver or USB
> problem, so I am posting it here.
>   Any pointers would definitely help.
> Thanks
> Syed

> usb-storage: *** thread awakened.
> usb-storage: Command WRITE_10 (10 bytes)
> usb-storage: 2a 00 00 00 10 c7 00 00 60 00 00 00
> usb-storage: Bulk command S 0x43425355 T 0x27 Trg 0
> LUN 0 L 49152 F 0 CL 10
> usb-storage: Bulk command transfer result=0
> usb-storage: usb_stor_transfer_partial(): xfer 4096
> bytes
> ehci_hcd <NULL>: devpath 1 ep2out 3strikes
> usb-storage: usb_stor_bulk_msg() returned -71 xferred
> 512/4096

This is a low-level hardware error.  It probably has nothing at all to 
do with directIO.

Alan Stern


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