On Thu, 07 Dec 2006 20:41:12 +0100, Matthias Schniedermeyer <[email protected]> wrote:
> >>I'm using a Bunch auf HDDs in USB-Enclosures for storing files.
> >>(currently 38 HDD, with a total capacity of 9,5 TB of which 8,5 TB is used)
> >>[....]
> >>This time i kept the defective files and used "vbindiff" to show me the
> >>difference. Strangly in EVERY case the difference is a single bit in a
> >>sequence of "0xff"-Bytes inside a block of varing bit-values that
> >>changed a "0xff" into a "0xf7".
> > This was almost certainly caused by hardware flaws in the USB interface
> > chips of the enclosures. There's nothing the kernel can do about it
> > because the errors aren't reported; all that happens is that incorrect
> > data is sent to or from the drive.
>
> So pretty much all ich can do is to pray that the errors don't corrupt
> the Filesystem-Metadata (XFS).
No, this is not all. You should buy a variety of different enclosures
with different chipsets (e.g. find a Freecom if you can), and also
use decent cables.
-- Pete
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