Hello, while copying CD-ROM contents from TEAC 32X drive on IDE channel to SCSI HDD (no other IDE devices), the system froze up with the following: --- Oct 8 17:27:03 entry automount[992]: attempting to mount entry /mnt/auto/cdrom Oct 8 17:27:03 entry kernel: hdb: ATAPI 32X CD-ROM drive, 128kB Cache, UDMA(33) Oct 8 17:27:03 entry kernel: Uniform CD-ROM driver Revision: 3.12 Oct 8 17:27:11 entry automount[3814]: expired /mnt/auto/cdrom Oct 8 17:27:12 entry automount[992]: attempting to mount entry /mnt/auto/cdrom Oct 8 17:27:17 entry automount[3821]: expired /mnt/auto/cdrom Oct 8 17:27:17 entry automount[992]: attempting to mount entry /mnt/auto/cdrom Oct 8 17:30:53 entry automount[3934]: expired /mnt/auto/cdrom Oct 8 17:34:40 entry automount[992]: attempting to mount entry /mnt/auto/cdrom Oct 8 17:37:08 entry kernel: Serverworks OSB4 in impossible state. Oct 8 17:37:08 entry kernel: Disable UDMA or if you are using Seagate then try switching disk types Oct 8 17:37:08 entry kernel: on this controller. Please report this event to osb4-bug@ide.cabal.tm --- Note that it was the second CD-ROM at a time, with ~456M copied over before the crash. First one was copied just before. The device was configured as a slave somehow, and here's hdparm info on it: --- /dev/hdb: HDIO_GET_MULTCOUNT failed: Invalid argument I/O support = 0 (default 16-bit) unmaskirq = 0 (off) using_dma = 1 (on) keepsettings = 0 (off) HDIO_GET_NOWERR failed: Invalid argument readonly = 1 (on) readahead = 8 (on) HDIO_GETGEO failed: Invalid argument busstate = 1 (on) Model=CD-232E, FwRev=1.0A, SerialNo= Config={ Fixed Removeable DTR<=5Mbs DTR>10Mbs nonMagnetic } RawCHS=0/0/0, TrkSize=0, SectSize=0, ECCbytes=0 BuffType=unknown, BuffSize=0kB, MaxMultSect=0 (maybe): CurCHS=0/0/0, CurSects=0, LBA=yes, LBAsects=0 IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120} PIO modes: pio0 pio1 pio2 pio3 pio4 DMA modes: sdma0 sdma1 sdma2 mdma0 mdma1 mdma2 udma0 udma1 *udma2 AdvancedPM=no --- dmesg/lspci from the same kernel (patched one) on the same hardware are attached; what else can be of any help? For now I'll disable DMA on that IDE. 2 goldhead: we'd better do that as a workaround if the chipset is found during installation... and/or warn if more than one device is there (as people were complaining). -- ---- WBR, Michael Shigorin ------ Linux.Kiev http://www.linux.kiev.ua/