ubuntu@ubuntu:~$ dmesg | grep '[hs]d[a-g]'
[17179576.080000]     ide0: BM-DMA at 0xd000-0xd007, BIOS settings: hda:DMA, hdb:pio
[17179576.080000]     ide1: BM-DMA at 0xd008-0xd00f, BIOS settings: hdc:DMA, hdd:pio
[17179576.500000] hda: QUANTUM FIREBALL CX20.4A, ATA DISK drive
[17179578.036000] hdc: SONY DVD RW DRU-530A, ATAPI CD/DVD-ROM drive
[17179578.384000] hda: max request size: 128KiB
[17179578.396000] hda: 39876480 sectors (20416 MB) w/418KiB Cache, CHS=39560/16/63, UDMA(33)
[17179578.396000] hda: cache flushes not supported
[17179578.396000]  hda:<4>hda: dma_timer_expiry: dma status == 0x21
[17179608.396000] hda: DMA timeout error
[17179608.396000] hda: dma timeout error: status=0x58 { DriveReady SeekComplete DataRequest }
[17179608.404000]  hda1 hda2 <<4>hda: dma_timer_expiry: dma status == 0x21
[17179638.404000] hda: DMA timeout error
[17179638.404000] hda: dma timeout error: status=0x58 { DriveReady SeekComplete DataRequest }
[17179638.408000]  hda5 >
[17179638.420000] hdc: ATAPI 40X DVD-ROM DVD-R CD-R/RW drive, 2048kB Cache, UDMA(33)
[17179658.444000] hda: dma_timer_expiry: dma status == 0x21
[17179668.444000] hda: DMA timeout error
[17179668.444000] hda: dma timeout error: status=0x58 { DriveReady SeekComplete DataRequest }
[17179688.452000] hda: dma_timer_expiry: dma status == 0x21
[17179698.452000] hda: DMA timeout error
[17179698.452000] hda: dma timeout error: status=0x58 { DriveReady SeekComplete DataRequest }