Using kernel 2.6.29-rc3... lspci says this device in IDE mode is ID 8086:292d Intel (ICH9M/M-E) In that mode it works with the ata_piix driver. But with ahci mode I get: ata2: Sata link up 1.5Gbps (SStatus 113 SControl 300) ata2.00 ATAPI: TSSTcorp CDDVDW TS-L633A, UO00, max MWDMA2, ATAPI AN ata2.00 applying bridge limits ata2.00 configured for PIO4 ata2.00 qc timeout (cmd 0xa0) ata2.00 failed to clear UNIT ATTENTION (err_mask=0x5) ata2: Sata link up 1.5Gbps (SStatus 113 SControl 300) ata2.00 configured for PIO4 ata2.00 qc timeout (cmd 0xa0) ata2.00 failed to clear UNIT ATTENTION (err_mask=0x5) ata2: limiting SATA link speed to 1.5Gbps ata2.00 limiting speed to PIO3 ata2: link is slow to respond, please be patient (ready=0) ata2: COMRESET failed (errno=-16) ata2: link is slow to respond, please be patient (ready=0) ata2: COMRESET failed (errno=-16) ata2: link is slow to respond, please be patient (ready=0) ata2: COMRESET failed (errno=-16) ata2: COMRESET failed (errno=-16) ata2: reset failed, giving up ata2.00: disabled ata2: hard resetting link ata2: link is slow to respond, please be patient (ready=0) ata2: COMRESET failed (errno=-16) etc. -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html