于 2010年11月15日 23:49, Joerg Schilling 写道:
The numbers lead to a missconfigured kernel that does not support DMA.
Thanks. You are right, I discovered this in kernel dmesg:
[ 1.760318] ata2.00: ATAPI: HL-DT-ST DVDRAM GSA-H10A, JL02, max UDMA/33
[ 1.760342] ata2.00: WARNING: ATAPI DMA disabled for reliability
issues. It can be enabled
[ 1.760344] ata2.00: WARNING: via pata_ali.atapi_dma modparam or
corresponding sysfs node.
but why DMA is not reliable is really off topic to this list. I'll ask
elsewhere.
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