Re: To mirror a huge tree...
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ron.l.johnson@cox.net wrote:
> ---- Paul E Condon <pecondon@mesanetworks.net> wrote:
>> On 2009-07-15_23:53:27, ron.l.johnson@cox.net wrote:
> [snip]
>> So you have 600/630 = 95% of the job done. To finish, I suggest
>> rsync starting with this as the destination of the copying. Even if
>> the source data is changing a bit from day-to-day, I'm sure the
>> great bulk of it is static. Keep repeating the rsync
>
> Who knows how many silent corruptions the FW drivers were slipping
> into the files.
rsync's --checksum option will check this out for you. Expect this run
to take a rather long time, as each bit of data and backup will be read
out. After a clean run you will know that all files are identical (and
fully readable).
I recommend to run this occasionally on backups in order to verify that
there is no silent corruption of data.
>> update until you get a clean, no descrepancies, run. Switching to a
>> different disk interface standard (and abandoning the existing 95%
>> solution (?) ) makes no sense to me.
>
> Sure it does, since how could I be sure that there was no underlying
> h/w issue?
See above.
> Copying it all thru the USB subssystem demonstrated that it wasn't a
> h/w fault. Or at least maybe the USB system is "better" at hiding
> faults.
You can find out.
Cheers,
Johannes
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