Re: Some NCQ numbers...

[Michael Tokarev]

Dan Aloni wrote:
> On Thu, Jun 28, 2007 at 02:51:58PM +0400, Michael Tokarev wrote:
>> [..]
>> Test machine was using MPTSAS driver for the following card:
>>   SCSI storage controller: LSI Logic / Symbios Logic SAS1064E PCI-Express Fusion-MPT SAS (rev 02)
>>
>> Pretty similar results were obtained on an AHCI controller:
>>   SATA controller: Intel Corporation 82801GR/GH (ICH7 Family) Serial ATA Storage Controller AHCI (rev 01)
>> on another machines.
> 
> Are you sure that NCQ was enabled between the controller and drive? 
> Did you verify this? I know about some versions that disable NCQ 
> support internally in their firmware (something to do with bugs in
> error handling).

The next obvious question is: how to check/verify this?

/mjt
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