Date: Tue, 1 Mar 2005 06:50:25 GMT From: Andrey Smagin <samspeedu@mail.ru> To: freebsd-bugs@FreeBSD.org Subject: Re: kern/78216: WRITE_DMA UDMA ICRC errors while copying data to a disk Message-ID: <200503010650.j216oPmr055073@freefall.freebsd.org>
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The following reply was made to PR kern/78216; it has been noted by GNATS. From: Andrey Smagin <samspeedu@mail.ru> To: freebsd-gnats-submit@FreeBSD.org Cc: Subject: Re: kern/78216: WRITE_DMA UDMA ICRC errors while copying data to a disk Date: Tue, 1 Mar 2005 09:45:26 +0300 >>How-To-Repeat: JH> Unknown if this is repeatable on any random system. It appears to JH> be an issue for many people, however, i did not see any reports of JH> multiple drive configurations such as mine. The fact that my second JH> drive had no DMA issues while my first drive did may be revealing. I have old hardware 1 CPU, 2MBoard, 64MBram(iP~200, chipsets iTX, VIA), and tested next configuration ata0 master - 2.1Gb(UDMA33)(may normally detected by BIOS for loading), ata1 master WD120Gb(UDMA33)(data storage), on both motherboards it error was occured, with destroying data. Problem was resolved by disabling DMA. Also I have another PC as server(iP166/VIA/64MB) with 20GB(UDMA33) and 120GB(UDMA100) (first for BIOS another for data), on it error was ocurred after loading kernel, but important data while not be destroyed. Speed of linear reading UDMA33(100) not more than 4Mbytes/s with 100% CPU usage. All HDD, MB, RAM modules different, but was tried it all possible combination. Version FreeBSD 6.0-CURRENT 4 month ago, now on all PC FreeBSD 6.0-CURRENT 2weeks ago with disabled DMA. Another PC is more modern (Duron 1133/SIS735/1GBram). ata0 master WD120GB, ata1 master Seagate 120GB, both UDMA100. Error never ocurred. -- Best regards, Andrey mailto:samspeedu@mail.ru
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