Date: Thu, 18 Sep 2003 21:26:23 +0200 (CEST) From: Soren Schmidt <sos@spider.deepcore.dk> To: Mark Knight <markk@knigma.org> Cc: freebsd-current@FreeBSD.ORG Subject: Re: ad0: WARNING - WRITE_MUL write data underrun Message-ID: <200309181926.h8IJQNFT026614@spider.deepcore.dk> In-Reply-To: <%2B2q6VqcEkfa$EwhJ@lap.knigma.org>
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It seems Mark Knight wrote:
> Current from approximately 0500 BST on 16th September is giving me
> errors like this from boot:
>
> ad0: WARNING - WRITE_MUL write data underrun 8192>2048
> ad0: WARNING - WRITE_MUL write data underrun 8192>6144
> ad0: WARNING - WRITE_MUL write data underrun 8192>4096
> ad0: WARNING - WRITE_MUL write data underrun 8192>4096
>
> Any thoughts? Does this imply data corruption?
Something is odd here, ata_pio_write(request, length) is called with:
ata_pio_write(request, request->transfersize);
and there the test is done like this:
if (request->transfersize < length) {
ata_prtdev(request->device, "WARNING - %s write data underrun %d>%d\n",
Maybe I just need some well earned sleep, but I cannot se how the warning
can happen at all, and yes you will have the missing bits filled with 0's.
-Søren
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