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ncq in non ncq system

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Shadowman9876

Limp Gawd
Joined
Jun 19, 2003
Messages
220
i need to buy a new hard drive soon. first of all what do you guys think about the seagate 7220.7 series, im not looking to spend a whole lot of money. second, i dont have ncq in my comp right not but i may upgrade in the future. can i use a ncq drive in a system without ncq, for some reason the ncq ones are cheaper on newegg anyway. also do you know of any good pci sata cards that support ncq. thanks alot
 
Hard Drive buying guide in this forum.
Also check www.storagereview.com and look in their performance database - they have some data on NCQ drives, both Maxtor MaxLineIII and Seagate Barracuda 7200.7 with and without NCQ. A NCQ ready SATA drive will work in a SATA system that doesn't support NCQ, and the drive will obviously not use NCQ without a NCQ capable controller.

Command queuing is a huge boost in multi user enterprise scenarios, where many users will be reading files off of many different areas of the disk, as it allows the drive to service read requests in the most efficient manner, rather than simply in the order they are received, at the expense of some performance overhead. However, single user situations are more linear in load, especially on a system that is regularly defragmented. Also, most of the files a desktop user will access at a given time are fairly close to each other on the disk, further minimizing the need/usefulness for NCQ, and the performance gain from NCQ is small. It may even be less than the overhead of NCQ and make the drive actually slower. The NCQ aware drives on SR are faster in their BootUp DriveMark with NCQ on, but slightly slower in their Gaming DriveMark with NCQ on.

As for compatible controllers, NCQ is part of the SATA-II feature set, along with 3 Gbps transfer and hot plug support. Any SATA-II controller should support NCQ, assuming that it fully complies with the standard.
 
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