hda dma_timer_expiry: dma status==0×61 ???

我的dmesg中的部分信息：
hda:<4>;hda: dma_timer_expiry: dma status == 0x61
hda: timeout waiting for DMA
hda: timeout waiting for DMA
hda: (__ide_dma_test_irq) called while not waiting
hda: status error: status=0x58 { DriveReady SeekComplete DataRequest }

hda: drive not ready for command
hda1 hda2 <<4>;hda: dma_timer_expiry: dma status == 0x61
hda: timeout waiting for DMA
hda: timeout waiting for DMA
hda: (__ide_dma_test_irq) called while not waiting
hda: status error: status=0x58 { DriveReady SeekComplete DataRequest }

hda: drive not ready for command
hda5<4>;hda: dma_timer_expiry: dma status == 0x61
hda: timeout waiting for DMA
hda: timeout waiting for DMA
hda: (__ide_dma_test_irq) called while not waiting
hda: status error: status=0x58 { DriveReady SeekComplete DataRequest }

hda: drive not ready for command
hda6<4>;hda: dma_timer_expiry: dma status == 0x61
hda: timeout waiting for DMA
hda: timeout waiting for DMA
hda: (__ide_dma_test_irq) called while not waiting
hda: status error: status=0x58 { DriveReady SeekComplete DataRequest }

hda: drive not ready for command
hda7 hda8 >;

我前面用的hdparm -v /dev/hdb 搞错了。实际上我的硬盘的设备文件应该是/dev/hda。下面我贴出hdparm -v /dev/hda。
hdparm -v /dev/hda

/dev/hda:
multcount = 16 (on)
IO_support =  0 (default 16-bit)
unmaskirq =  0 (off)
using_dma =  0 (off)
keepsettings =  0 (off)
readonly    =  0 (off)
readahead =  8 (on)
geometry    = 2654/240/63, sectors = 40132503, start = 0

所以这儿看起来好象是一点错误都没有的。到底是怎么回事情呢？请大侠/高手/高人/达人分析一下。