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[ale] hdparm fails setting DMA



Can suggest how to get around this problem?

----cut----
trombone dcorbin # hdparm -d1 /dev/hda

/dev/hda:
 setting using_dma to 1 (on)
 HDIO_SET_DMA failed: Operation not permitted
 using_dma    =  0 (off)
-----end-------
Thanks,
David