How do I use NCQ of Intel X25-E(SSD) on ahci(4)?
serenity at exscape.org
Tue Dec 15 09:41:56 UTC 2009
On Dec 15, 2009, at 10:36 AM, Wes Peters wrote:
> On Wed, Nov 18, 2009 at 7:46 AM, Norikatsu Shigemura <nork at freebsd.org> wrote:
>> Hi Alexander!
>> I have a Intel 64GB SSD(X25-E) and a Western Digital Caviar Green
>> 1TB HDD (WD10EADS), and use them on ahci(4). ahci(4) can use NCQ
>> of WD10EADS, but doesn't use NCQ of X25-E.
> How useful is NCQ on an SSD? Isn't the primary thrust of NCQ to allow
> the disk to reorder writes to optimize the seek pattern?
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