External USB harddisk problems

External USB harddisk problems

[Johan Groth]

Hi,
I'm experiencing problems with a Maxtor USB HD drives that hope someone 
on this list can shed some light on. When I try to copy a file to or 
from the HD that is > 100MB the whole system hangs. I can't ping it from 
another systems, nothing shows up in any logs so I don't know why it 
hangs. I'm using 2.6.8-k7-smp from Debian unstable. The USB card is a 
2.0 version with a Nec chipset.

Regards,
Johan

PS, please CC me as I'm not subscribed to this list.



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Re: External USB harddisk problems

[Richard B. Johnson]

On Mon, 25 Oct 2004, Johan Groth wrote:

> Hi,
> I'm experiencing problems with a Maxtor USB HD drives that hope someone on 
> this list can shed some light on. When I try to copy a file to or from the HD 
> that is > 100MB the whole system hangs. I can't ping it from another systems, 
> nothing shows up in any logs so I don't know why it hangs. I'm using 
> 2.6.8-k7-smp from Debian unstable. The USB card is a 2.0 version with a Nec 
> chipset.
>
> Regards,
> Johan
>
> PS, please CC me as I'm not subscribed to this list.

Just some information.... Most of these external USB and/or
external Firewire disks such as ACOM, etc., contain an
EIDE (ATA) hard disk plus an adapter board with a
USB or IEEE sequencer. These sequencers can be a pain
in the ass because they do 8-bit math. It may be necessary
to artifically constrain the per-operation data-length
with this in mind.


Cheers,
Dick Johnson
Penguin : Linux version 2.6.9 on an i686 machine (5537.79 GrumpyMips).
                  98.36% of all statistics are fiction.