The Thu, 3 Mar 2005 22:50:34 +0100
"Gerd v. Egidy" <[EMAIL PROTECTED]> wrote:
> Hi Samuel,
>
Hello again,
> > When issuing a command which I knew produced the errors, I got the
> > surprise to see that no usb reset happened when the transfers were made
> > through the hub. I tested it several times, enough so that in the
> > previous configuration it would have made at least an error, and
> > nothing.
>
> as you might have seen on this list (subject: "usb-storage: speed
> inconsistent, disconnect, oops") I have problems with my usb frame too. I
> get a lot of usb resets during the transfer and a disconnect after some
> time.
>
I finally found the source of the error.
Yesterday I made a test by copying a bunch of datas from lacie1 to
lacieroot, and I noticed that this time the errors did not came from
lacieroot as it happened before, but from lacie1...
So today I decided to plug both disks on other plugs, and made the following
tests (with about 25 Go of data, so I think it's a good test in that
regard):
- copy from lacie1 to lacieroot
- copy of the same files from lacieroot to lacie1
- md5sum of both directories (on lacieroot and lacie1) at the same time.
Not a single error. So I am glad to say that the error was an hardware one,
and came from a particular plug of the root hub of the machine. This does
not come too much as a surprise, as it is a mini-form factor ("openbrick
ng"), and EM interferences might happen (as I saw it as a possible cause
of error with your problem). At least I identified the plug where the
problems happen... It also explains why the additional hub solved the
problem (I do not remember where it was plugged, but most probably on a
correct plug).
I also saw that your problems were hardware-related... Too bad designers
seem to forget about sensitivity to EM interferences, I suppose.
Anyway, I am ashamed to have made some people on the list (especially Alan)
lose their time with me, and if I ever meet them in flesh, they can remind
me that I must pay them a drink :-). What's funny is that the usb reset
patch from Alan corrected a hardware problem :-).
Many thanks people, and keep up the excellent work.
Samuel
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