Re: Impact of no_lba48{_dma} = 1 ?

[Steven Scholz <steven.scholz@imc-berlin.de>]

Alan wrote:
> On Wed, 07 Feb 2007 16:49:44 +0300
> Sergei Shtylyov <sshtylyov@ru.mvista.com> wrote:
> 
>> Hello.
>>
>> Alan wrote:
>>
>>>>> Only relevant for DMA really
>>>> So rqsize is only needed for DMA accesses?
>>     Not really, it affects both PIO and DMA.
> 
> Yes but its not relevant. The question was about performance, and your
> performance will suck equally with PIO regardless of the request size
> limit.

Ok: I rephrase my question:

Could it be that my HDD behaves strangly (i.e. doing

	hda: status timeout: status=0xd0 { Busy }
	ide: failed opcode was: unknown
	hda: no DRQ after issuing MULTWRITE_EXT
	ide0: unexpected interrupt, status=0x80, count=1
	ide0: reset: success

) sometimes when rqsize is set to 65536 altough I only do PIO transfer?

Steven