[CentOS] Re: SATA Native Command Queuing

[Kay Diederichs]

Aleksandar Milivojevic wrote:
> Matt wrote:
>> Does CentOS support NCQ on SATA drives?  If so is there something I
>> must do to turn this support on?
> 
> NCQ was planned for kernel 2.6.18, but I haven't checked if it actually
> made it there.  CentOS 5 should have at least that version of kernel
> (RHEL5 beta 2 uses 2.6.18).  There's always probability that RH will
> backport it to 2.6.9.
> 

kernel 2.6.18 supports NCQ if the driver is e.g. ahci or sata_sil24 
(i.e. not sata_nv, ata_piix, sata_sil). See http://linux-ata.org/ and 
http://linuxmafia.com/faq/Hardware/sata.html

HTH,
Kay