On Sun, 2 Sep 2012, Alon Bar-Lev wrote:

> Attached usbmon, I hope I've done this OK.

The errors start here:

> ffff880112a12d80 3034504955 S Bo:2:009:2 -115 31 = 55534243 0a000000 00100000 
> 80000a28 00000000 00000008 00000000 000000
> ffff880112a12d80 3034505013 C Bo:2:009:2 0 31 >
> ffff880132074d80 3034505019 S Bi:2:009:1 -115 4096 <
> ffff880132074d80 3034505155 C Bi:2:009:1 -32 0
> ffff880112a12d80 3034505161 S Co:2:009:0 s 02 01 0000 0081 0000 0
> ffff880112a12d80 3034505298 C Co:2:009:0 0 0
> ffff880112a12d80 3034505308 S Bi:2:009:1 -115 13 <
> ffff880112a12d80 3034505441 C Bi:2:009:1 0 13 = 55534253 0a000000 00000000 02

This shows the computer asking the drive to read 8 blocks starting at
block 0.  The drive (actually the JMicron USB interface, not the drive
itself) returns an error code indicating that it thinks the command 
was not sent properly -- even though it was.

I don't understand why the JMicron unit doesn't accept this command.  
It simply appears to be broken.  Does it work if you plug it into a 
computer running Windows or Mac OS X?

Alan Stern

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