Date: Tue, 26 Aug 2003 01:43:38 +0200 From: Bernd Walter <ticso@cicely12.cicely.de> To: Lars Eggert <larse@ISI.EDU> Cc: current <current@freebsd.org> Subject: Re: panic with CF drive + USB reader Message-ID: <20030825234337.GM39362@cicely12.cicely.de> In-Reply-To: <3F4A9A51.4000002@isi.edu> References: <3F4AD502.5010709@isi.edu> <3F4A7B91.8070803@isi.edu> <20030825223418.GJ39362@cicely12.cicely.de> <3F4A9A51.4000002@isi.edu>
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On Mon, Aug 25, 2003 at 04:22:57PM -0700, Lars Eggert wrote: > It seems that this happens under light or no load only. I had been doing > a heavy cycle of dump/restore/dd, etc, and all was well. Could it be > that the MicroDrive does some kind of internal power management that > delays its reponses some, and the kernel doesn't expect that? Yes microdrives stop spinning when idle for a while to save energy for batterie powered devices and possibly to decrease wear. That could explain on how to trigger this problem. Handling should have been done transparently by your reader. Is your reader declared to support microdrives? -- B.Walter BWCT http://www.bwct.de ticso@bwct.de info@bwct.de
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