I'm experiencing the same issue with a brand new install, though different hardware ... I've an Adaptec 1205 SATA controller and a pair of Samsung 160 gig drives.
Error only occurs under load, the first time it happened the machine locked and spontaneously rebooted and required a manual fsck of the mirror; which completed successfully, but then rebuilt the mirror very slowly ... Second time, the stressor (copying a 5 gig drive image to it) the machine held up, but got many DMA WRITE errors to ad6 ... below is the smartctl output on that drive, but I don't see anything other than the DMA WRITE errors, though I confess to not being really up on what smartctl outputs ... lighty# ./smartctl -a /dev/ad6 smartctl version 5.33 [i386-portbld-freebsd6.0] Copyright (C) 2002-4 Bruce Allen Home page is http://smartmontools.sourceforge.net/ === START OF INFORMATION SECTION === Device Model: SAMSUNG HD160JJ Serial Number: S08HJ1MYC31118 Firmware Version: ZM100-33 User Capacity: 160,041,885,696 bytes Device is: In smartctl database [for details use: -P show] ATA Version is: 7 ATA Standard is: ATA/ATAPI-7 T13 1532D revision 4a Local Time is: Mon Feb 20 08:36:15 2006 CST SMART support is: Available - device has SMART capability. SMART support is: Enabled === START OF READ SMART DATA SECTION === SMART overall-health self-assessment test result: PASSED The errors don't cut and paste nicely ... but there are 35 instances of a DMA WRITE failed, followed by 4 DMA READ fails ... Thoughts, comments and suggestions welcome. Hank _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"