Date: Mon, 26 Oct 2009 09:05:03 +0900 From: non@ever.sanda.gr.jp To: "M. Warner Losh" <imp@bsdimp.com> Cc: usb@freebsd.org, hackers@freebsd.org Subject: Re: Help troubleshooting... Message-ID: <4AE4E7AF.8060103@ever.sanda.gr.jp> In-Reply-To: <20091025.133437.-1844000782.imp@bsdimp.com> References: <20091025.133437.-1844000782.imp@bsdimp.com>
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M. Warner Losh wrote: > I have a usb stick (8GB) on it. This stick has about 5GB of junk on > it at this point. > > I tried to do 'cat * > /dev/null' recently, to measure how fast it > goes. It got about 1GB into the drive and then I got device missing > messages. : > So devfs thinks the device went missing: Warner-san, maybe it is caused by the hardware problem on the USB flash memory. Some chip on the memory might have too much heat when you access the memory at fast rate. Then it stops working. // Noriaki Mitsunaga
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