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From: "Kyryll Mirnenko" <mirya@ukr.net>
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Subject: Working with non-DMA HDDs
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  I've got HDD without DMA which fails to be under writting for a while without pauses. Sequental (without pauses) flushing of 3-4 memory buffers to disk make it go away (ERR: device disappeared). For ex., 4.5 release installer fails with this error.
  I found that even the small break makes HDD work normally (as in DOS/Windows).
  Is there any alternative HDD driver which doesn't use memory buffer this way? Or give another solution.