* SATA 150 vs SATA 300
@ 2006-08-24 14:51 Marc Perkel
2006-08-25 2:32 ` Jeff Garzik
0 siblings, 1 reply; 2+ messages in thread
From: Marc Perkel @ 2006-08-24 14:51 UTC (permalink / raw)
To: Linux Kernel
Another speed related question. How much faster are SATA II drives
compared to regular SATA drives in real life? And - does NCQ really
help? I'm just looking for a general guess in the form of, "The Disk IO
upgrading to SATA II with NCQ will generally be X% faster." What value is X?
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: SATA 150 vs SATA 300
2006-08-24 14:51 SATA 150 vs SATA 300 Marc Perkel
@ 2006-08-25 2:32 ` Jeff Garzik
0 siblings, 0 replies; 2+ messages in thread
From: Jeff Garzik @ 2006-08-25 2:32 UTC (permalink / raw)
To: Marc Perkel; +Cc: Linux Kernel
Marc Perkel wrote:
> Another speed related question. How much faster are SATA II drives
> compared to regular SATA drives in real life? And - does NCQ really
> help? I'm just looking for a general guess in the form of, "The Disk IO
> upgrading to SATA II with NCQ will generally be X% faster." What value
> is X?
SATA 150 and SATA 300 refers to interface speed (1.5Gbps or 3Gbps).
Unless its entirely flash-based or RAM-based, it is highly unlikely that
your disk max out the SATA cable bandwidth.
There is "SATA II is x times faster" rule, because it depends on the
drive mechanics inside. A SATA II drive may be exactly the same speed
as SATA I, except that it is upgraded to support NCQ and other SATA II
features.
NCQ definitely helps.
Jeff
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2006-08-25 2:32 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2006-08-24 14:51 SATA 150 vs SATA 300 Marc Perkel
2006-08-25 2:32 ` Jeff Garzik
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox