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dma error



Hello every
My name is Wang. I need help.
Hello i have troubles with my disc , error dma.
Who can tell me the causes of the  error dma.
Where can find the status list .

Thank you very much.

Best regards

os redhat linux 7.3

Jan 13 12:15:55 xt kernel: hda: dma_timer_expiry: dma status == 0x20
Jan 13 12:15:55 xt kernel: hda: timeout waiting for DMA
Jan 13 12:15:55 xt kernel: hda: timeout waiting for DMA
Jan 13 12:15:55 xt kernel: hda: (__ide_dma_test_irq) called while not
waiting
Jan 13 12:15:55 xt kernel: hda: status timeout: status=0xd0 { Busy }
Jan 13 12:15:55 xt kernel:
Jan 13 12:15:55 xt kernel: hda: drive not ready for command
〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜
Jan 13 12:28:55 xt kernel: hda: 
dma_timer_expiry: dma status == 0x21
Jan 13 12:29:05 xt kernel: hda: error waiting for DMA
Jan 13 12:29:05 xt kernel: hda: dma timeout retry: status=0xd0 { Busy }
Jan 13 12:29:05 xt kernel:
Jan 13 12:29:05 xt kernel: hda: DMA disabled
〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜
Jan 13 12:30:25 xt kernel: hda: 
dma timeout retry: status=0x58 { DriveReady SeekComplete DataRequest }
Jan 13 12:30:25 xt kernel:
Jan 13 12:30:25 xt kernel: hda: status error: status=0x58 { DriveReady
SeekComplete DataRequest }
Jan 13 12:30:25 xt kernel:
Jan 13 12:30:25 xt kernel: hda: drive not ready for command
Jan 13 12:30:25 xt kernel: hda: status error: status=0x58 { DriveReady
SeekComplete DataRequest }
Jan 13 12:30:25 xt kernel:
Jan 13 12:30:25 xt kernel: hda: drive not ready for command
Jan 13 12:30:25 xt kernel: hda: status error: status=0x58 { DriveReady
SeekComplete DataRequest }
Jan 13 12:30:25 xt kernel:




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