PCIe 16x Slot | SATA Raid 0 Performance

[BLJ]

There is an extensive RAID article on the AnandTech website.

 

What they have found is that command queueing (NCQ or TCQ) actually slows down a RAID 0 array.

 

Command queueing works best in a multi-user environment, so command queueing is bad on a client PC but is good on a server PC.

 

If your drives support it, you can enable/disable command queueing in Device Manager under the SCSI Properties tab for the Disks category.

 

Hi there,

 

thanks for the info, but i didn't find any newer review on anadtech about Raid / NCQ. They're all at least 3 Years old, one dating from 2002 and one from 2001.

 

The one from 2004 (related to the Raptor HDD) isn't talking much about NCQ.

 

anyway... i don't know how NCQ should have a bad effect on RAID0 used in a multi-user environment?

in Single user environment it could be, if the implementation is not so good. But in pure sequential read it shouldn't reduce troughput altough it might arise latency.

 

cya

[chynn]

Hi BLJ,

 

That's what I thought I wrote. Turn NCQ/TCQ off in a client PC. Turn NCQ/TCQ on in a server (multi-user) PC.

 

Hope this helps ...