I have observed this error message on two different computers, Pentium 4 3.4GHz and Pentium 4 3.0Ghz - both dual core chips. They were both Hewlett Packard dc7600 Small Form Factor computers. The error only occurs when a CD/DVD is in the drive. The error is: acd0: FAILURE - READ_BIG MEDIUM ERROR asc=0x11 ascq=0x05 I don't know exactly what this error means, but suspect it is an error related to an error in the media/medium, i.e. CD/DVD disc. I had a different computer (but the same HP dc7600) running FreeBSD-8.0 and this error was not produced. How-To-Repeat: Access the CD/DVD drive with a CD/DVD in it.
I have also similar problem occurred after updating the CURRENT kernel. uname -a: FreeBSD nonamehost 9.0-CURRENT FreeBSD 9.0-CURRENT #0: Tue Aug 3 12:36:02 EEST 2010 root@nonamehost:/usr/obj/usr/src/sys/mk9 amd64 dmesg: ... ata0: WARNING - unknown CMD (0xac) read data overrun 8>0 ata0: WARNING - unknown CMD (0xac) read data overrun 8>0 ata0: WARNING - unknown CMD (0xac) read data overrun 8>0 ata0: WARNING - unknown CMD (0xac) read data overrun 8>0 acd0: FAILURE - READ_TOC ILLEGAL REQUEST asc=0x24 ascq=0x00 acd0: FAILURE - READ_TOC ILLEGAL REQUEST asc=0x24 ascq=0x00 acd0: FAILURE - READ_TOC ILLEGAL REQUEST asc=0x24 ascq=0x00 (cd0:ata0:0:0:0): READ TOC/PMA/ATIP. CDB: 43 0 0 0 0 0 0 0 4 0 (cd0:ata0:0:0:0): CAM status: SCSI Status Error (cd0:ata0:0:0:0): SCSI status: Check Condition (cd0:ata0:0:0:0): SCSI sense: ILLEGAL REQUEST asc:24,0 (Invalid field in CDB) ... and after attempting to record the project in k3b ... ata0: WARNING - unknown CMD (0xac) read data overrun 8>0 ata0: WARNING - unknown CMD (0xac) read data overrun 8>0 acd0: FAILURE - READ_TOC ILLEGAL REQUEST asc=0x24 ascq=0x00 acd0: FAILURE - WRITE_BIG ILLEGAL REQUEST asc=0x64 ascq=0x00 ata0: WARNING - unknown CMD (0xac) read data overrun 8>0 ata0: WARNING - unknown CMD (0xac) read data overrun 8>0 ... kldstat Id Refs Address Size Name 1 65 0xffffffff80100000 9bb398 kernel 2 5 0xffffffff80abc000 42490 linux.ko 3 1 0xffffffff80aff000 24f98 snd_hda.ko 4 2 0xffffffff80b24000 755c8 sound.ko 5 1 0xffffffff80b9a000 6a78 acpi_video.ko 6 1 0xffffffff80ba1000 10228 ahci.ko 7 1 0xffffffff80bb2000 da0108 nvidia.ko 8 1 0xffffffff81953000 5658 cuse4bsd.ko 9 1 0xffffffff81a12000 3b57 linprocfs.ko 10 1 0xffffffff81a16000 9eb linsysfs.ko 11 1 0xffffffff81a17000 1b59 atapicam.ko 12 1 0xffffffff81a19000 24d cd9660_iconv.ko 13 1 0xffffffff81a1a000 225d libiconv.ko 14 1 0xffffffff81a1d000 285fc kqemu.ko 15 1 0xffffffff81a46000 3fd6 sdhci.ko 16 1 0xffffffff81a4a000 4f63 mmc.ko 17 1 0xffffffff81a4f000 16d5 mmcsd.ko 18 1 0xffffffff81a51000 a8f2 fuse.ko 19 1 0xffffffff81a5c000 5ea5 aio.ko 20 1 0xffffffff81a62000 1fa green_saver.ko 21 1 0xffffffff81a63000 754 rtc.ko 22 1 0xffffffff81a64000 a70e ext2fs.ko
For bugs matching the following criteria: Status: In Progress Changed: (is less than) 2014-06-01 Reset to default assignee and clear in-progress tags. Mail being skipped