Date: Tue, 09 Aug 2005 15:14:38 -0400 From: Chuck Swiger <cswiger@mac.com> To: "O. Hartmann" <ohartman@mail.uni-mainz.de> Cc: freebsd-stable@freebsd.org, freebsd-questions@freebsd.org Subject: Re: ad10: WARNING - READ_DMA UDMA ICRC error (retrying request) LBA=11441599 Message-ID: <42F9009E.3030601@mac.com> In-Reply-To: <42F7F7E8.1020507@mail.uni-mainz.de> References: <42F7F7E8.1020507@mail.uni-mainz.de>
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O. Hartmann wrote: [ ... ] > One of my SATA disks, the SAMSUNG SP2004C seems to show errors during > operation (and also showd under 5.4-RELEASE-p3). > Sometimes I get this error: > ad10: WARNING - READ_DMA UDMA ICRC error (retrying request) LBA=11441599 > while the machine still keeps working. > Other days the box crashes completely. > > Is this a operating system bug or is this message an evidence of > defective hardware? Back up any data you care about now. Use the smartmontools port or hunt down a utility from Samsung which'll do a surface test (read only, nondestructive). You can also run a "dd if=/dev/ad10 of=/dev/null bs=8192" to do a full read test under FreeBSD, and see how many CRC errors show up. -- -Chuck
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