From: Chuck Lever <chuck.lever@oracle.com>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: linux-kernel@vger.kernel.org
Subject: Re: DMA CRC errors with SiS chipset and notebook drive
Date: Thu, 09 Aug 2007 10:52:57 -0400 [thread overview]
Message-ID: <46BB2A49.5090503@oracle.com> (raw)
In-Reply-To: <20070809155324.3a9499ca@the-village.bc.nu>
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Alan Cox wrote:
>> Aug 9 07:41:29 monet kernel: ata1.00: limiting speed to UDMA/66:PIO4
>> Aug 9 07:41:29 monet kernel: ata1.00: exception Emask 0x0 SAct 0x0 SErr
>> 0x0 action 0x2
>> Aug 9 07:41:29 monet kernel: ata1.00: (BMDMA stat 0x64)
>> Aug 9 07:41:29 monet kernel: ata1.00: cmd
>> c8/00:08:fb:7c:a1/00:00:00:00:00/e0 tag 0 cdb 0x12 data 4096 in
>> Aug 9 07:41:29 monet kernel: res
>> 51/84:00:00:00:00/00:00:00:00:00/e0 Emask 0x10 (ATA bus error)
>> Aug 9 07:41:29 monet kernel: ata1: soft resetting port
>> Aug 9 07:41:29 monet kernel: ata1.00: configured for UDMA/66
>> Aug 9 07:41:29 monet kernel: ata1.01: configured for UDMA/33
>> Aug 9 07:41:29 monet kernel: ata1: EH complete
>
> Drops to UDMA33 for 40 wire cable.
It drops from UDMA/100 to UDMA/66 for the disk, but stays at UDMA/33 for
the optical drive. If I have only the disk on that controller, the disk
still drops to UDMA/66.
> Looks to me like your cabling is out of spec or you have electrical noise
> problems.
I've tried different cabling solutions, including round and flat IDE
cables. What might cause "electrical noise"? Are 44-40 pin adapters
reliable?
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prev parent reply other threads:[~2007-08-09 14:53 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-09 13:39 DMA CRC errors with SiS chipset and notebook drive Chuck Lever
2007-08-09 14:53 ` Alan Cox
2007-08-09 14:52 ` Chuck Lever [this message]
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