wd0(pciide0:0:0): timeout
        type: ata
        c_bcount: 512
        c_skip: 0
pciide0:0:0: bus-master DMA error: missing interrupt, status=0x21
wd0c: device timeout reading fsbn 0 (wd0 bn 0; cn 0 tn 0 sn 0), retrying
wd0(pciide0:0:0): timeout
        type: ata
        c_bcount: 512
        c_skip: 0
pciide0:0:0: bus-master DMA error: missing interrupt, status=0x21
wd0: transfer error, downgrading to Ultra-DMA mode 1
wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 1
wd0c: device timeout reading fsbn 0 (wd0 bn 0; cn 0 tn 0 sn 0), retrying
wd0(pciide0:0:0): timeout
        type: ata
        c_bcount: 512
        c_skip: 0
pciide0:0:0: bus-master DMA error: missing interrupt, status=0x21
wd0: transfer error, downgrading to Ultra-DMA mode 0
wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 0
wd0c: device timeout reading fsbn 0 (wd0 bn 0; cn 0 tn 0 sn 0), retrying
wd0(pciide0:0:0): timeout
        type: ata
        c_bcount: 512
        c_skip: 0
pciide0:0:0: bus-master DMA error: missing interrupt, status=0x21
wd0: transfer error, downgrading to DMA mode 2
wd0(pciide0:0:0): using PIO mode 4, DMA mode 2
wd0c: device timeout reading fsbn 0 (wd0 bn 0; cn 0 tn 0 sn 0), retrying
wd0: soft error (corrected)
wd0(pciide0:0:0): timeout
        type: ata
        c_bcount: 512
        c_skip: 0
pciide0:0:0: bus-master DMA error: missing interrupt, status=0x21
wd0: transfer error, downgrading to PIO mode 4
wd0(pciide0:0:0): using PIO mode 4
wd0c: device timeout reading fsbn 64 (wd0 bn 64; cn 0 tn 1 sn 1), retrying
wd0: soft error (corrected)