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Subject: Re: RFC: Q73 Recorder crashes during copy
From: Mike Holden (rockbox_at_mikeholden.uklinux.net)
Date: 2003-04-30


Johan Vromans said:
> Comments welcome.
>
> Q73: Help! My recorder crashes when I copy files to it!
>
> A73: Yes, the recorder can crash when you copy several gigabytes of
> files to it. The explanation is simple: Copying several gigabytes
> of files through USB requires a long period of sustained disk
> activity and drains more power than the batteries of the recorder
> can store. A long copy will eventually drain the batteries to the
> point where the recorder can no longer function and it halts. This
> even happens when connected to the charger, since the power drain
> is more than the charger can provide! If the recorder halts while
> connecter to the charger, the batteries will recover and after a
> short while it will reboot the Archos firmware in charger mode. To
> make it worse, depending on the USD drivers of your

Do you mean USB? ;-)

> system it can cause your system to crash as well, or confuse it to
> the point it needs a reboot.
>
> There is no solution, just some tips.
>
> * Connect to the charger when copying lots of files. This will
> not prevent the problem, but it will take longer to happen.
> * Use USB 2.0. Transfers will be much faster.
> * Copy incrementally. With fully charged standard batteries it
> should be capable of sustained copying for 2 - 2.5 hours.

This sounds fine, pending my patch of course!

-- 
Mike Holden



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