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Date:      Tue, 19 Aug 2008 08:43:19 -0600 (MDT)
From:      Warren Block <wblock@wonkity.com>
To:        Jeffrey Goldberg <jeffrey@goldmark.org>
Cc:        Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>, "Jason C. Wells" <jcw@highperformance.net>, freebsd general questions <freebsd-questions@freebsd.org>
Subject:   Re: USB Drive Reliability
Message-ID:  <alpine.BSF.1.10.0808190838050.77198@wonkity.com>
In-Reply-To: <37D65ECB-A87E-4949-ABF8-33249DA31D80@goldmark.org>
References:  <48A85276.7070306@highperformance.net> <20080818000858.D21615@wojtek.tensor.gdynia.pl> <48A8C40E.2060802@highperformance.net> <37D65ECB-A87E-4949-ABF8-33249DA31D80@goldmark.org>

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On Mon, 18 Aug 2008, Jeffrey Goldberg wrote:

> I have one system (7.0) which becomes extremely unstable if I have a USB 
> drive connected.  I usually get a system crash in 10 to 30 minutes after 
> mounting the USB drive.  It has never crashed without the USB drive attached, 
> and it has never gone for more than three days with it attached.  Usually the 
> failure is much sooner.  This was with 7.0-RELEASE.  I haven't checked since 
> I've moved to 7-STABLE.
>
> I have another system (identical software, different hardware) which is solid 
> as a rock with the identical USB drive attached.
>
> Unfortunately, the crashing system is a small form machine and there is no 
> way to put in a different USB controller.  The USB drive was for backups, 
> which I now do over the network to the machine that is working just fine.

That might indicate a cable problem, even just being too long.  A 
line-powered hub added between a problematic USB card reader and 
computer fixed an unreliable situation here.

-Warren Block * Rapid City, South Dakota USA



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