persisting ATA problems

Søren Schmidt sos at
Mon Oct 4 13:27:39 PDT 2004

Ion-Mihai Tetcu wrote:
> On Mon, 04 Oct 2004 21:46:50 +0200
> Søren Schmidt <sos at> wrote:
>  [ ... ]
>>>Today I had the following in log:
>>>ad0: WARNING - WRITE_DMA interrupt was seen but timeout fired LBA=637375
>>>i don`t know exactly what does it mean and if data was written or not..
>>>can anybody explain it?
>>It just means that the data has hit the disk but the taskqueue that 
>>should return data to the system hasn't yet. This is a warning ...
> I would suggest an entry in the FAQ explaining the *_DMA errors; Søren,
> I can do the SGML formatting if you send me some text.

First of, they are not just about _DMA, and there isn't much to explain.

There are two types:

just some noise about things that are not as expected, but could be 
fixed or otherwise worked around, but not yet a:

operation failed, uncorrectable error.

That is the general meaning of those two words where I come from...



More information about the freebsd-current mailing list