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Groups > comp.sys.ibm.pc.hardware.storage > #2284
| From | "Rod Speed" <rod.speed.aaa@gmail.com> |
|---|---|
| Newsgroups | comp.sys.ibm.pc.hardware.storage |
| Subject | Re: IDE or AHCI ? |
| Date | 2012-01-06 17:35 +1100 |
| Message-ID | <9mnj16F3v8U1@mid.individual.net> (permalink) |
| References | (1 earlier) <4f03de83$1@news.bnb-lp.com> <hPWdnT07Memqm5nSnZ2dnUVZ7oadnZ2d@lyse.net> <4f046249$1@news.bnb-lp.com> <9mjrq7F90aU1@mid.individual.net> <5YadnVh378gqYJjSnZ2dnUVZ8uadnZ2d@giganews.com> |
Yousuf Khan wrote > Rod Speed wrote >> Yousuf Khan wrote >>> David Brown wrote >>>> NCQ won't make a significant difference in Linux, since it has >>>> always had good algorithms to order disk accesses to minimise head >>>> movement. It will sometimes make things worse, such as when the OS >>>> wants to enforce a particular order (for transactions to filesystem >>>> journals, for example). And NCQ doesn't help windows much either - >>>> after all, it only applies when you do more than one thing at a time. >>> I find that it doesn't even help even when multitasking. >> The benchmarks clearly show that it does. >> Not very dramatically tho. > Too bad you can't run benchmarks as your applications. You can however use what you care about the speed of as the benchmark. >>> I monitor the disk subsection of the Resource Monitor regularly, >>> and very often when the disk is busy the Disk Queue Length is over 1.00 (meaning more than 1 process is actively >>> waiting on the disk) and the Active Time is pegged near 100%. >> Doesnt mean that NCQ doesnt help in that situaiton. > When I'm talking about the disk queue being higher than 1.00, I don't mean just something minor like 1.01, or 1.10, > but I'm talking about 5.00, or even 10.00! There could be 10 process waiting on the disk queue at any given time. I just dont believe that that happens all that much for long to matter. > This normally happens during boot-up time, Like I have said to you before, anyone with even half a clue boots so rarely that that situation is completely irrelevant. If you care about the speed of your system, the only thing that makes any sense at all is to only boot very rarely, weeks or months apart, and suspend or hibernate, not shutdown. Even if you are silly enough to religiously update as often as you can, any reboot involved should happen when you arent using the system. > but it doesn't take very long for the disk queue to kick up to the stratosphere at any time. Thats just plain wrong with numbers like that. > Just a few apps trying to access the same disk at the same time, and you got major delays. Thats just plain wrong with modern hard drives. Very minor delays in fact with modern fast seeking drives.
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IDE or AHCI ? Lynn McGuire <lmc@winsim.com> - 2012-01-03 12:30 -0600
Re: IDE or AHCI ? Arno <me@privacy.net> - 2012-01-03 21:05 +0000
Re: IDE or AHCI ? "arno fucker" <af@arnofucker.com> - 2012-01-04 12:41 +1100
Re: IDE or AHCI ? "Rod Speed" <rod.speed.aaa@gmail.com> - 2012-01-04 12:58 +1100
Re: IDE or AHCI ? Yousuf Khan <bbbl67@spammenot.yahoo.com> - 2012-01-04 00:07 -0500
Re: IDE or AHCI ? David Brown <david@westcontrol.removethisbit.com> - 2012-01-04 08:53 +0100
Re: IDE or AHCI ? "Rod Speed" <rod.speed.aaa@gmail.com> - 2012-01-04 20:32 +1100
Re: IDE or AHCI ? David Brown <david@westcontrol.removethisbit.com> - 2012-01-04 14:44 +0100
Re: IDE or AHCI ? "Rod Speed" <rod.speed.aaa@gmail.com> - 2012-01-05 07:37 +1100
Re: IDE or AHCI ? David Brown <david.brown@removethis.hesbynett.no> - 2012-01-04 22:56 +0100
Re: IDE or AHCI ? "Rod Speed" <rod.speed.aaa@gmail.com> - 2012-01-05 09:48 +1100
Re: IDE or AHCI ? Ed Light <nobody@nobody.there> - 2012-01-04 21:40 -0800
Re: IDE or AHCI ? Mike Tomlinson <mike@jasper.org.uk> - 2012-01-05 05:37 +0000
Re: IDE or AHCI ? "Rod Speed" <rod.speed.aaa@gmail.com> - 2012-01-05 17:37 +1100
Re: IDE or AHCI ? Yousuf Khan <bbbl67@spammenot.yahoo.com> - 2012-01-04 09:29 -0500
Re: IDE or AHCI ? David Brown <david@westcontrol.removethisbit.com> - 2012-01-04 16:04 +0100
Re: IDE or AHCI ? Arno <me@privacy.net> - 2012-01-04 19:19 +0000
Re: IDE or AHCI ? David Brown <david.brown@removethis.hesbynett.no> - 2012-01-04 23:14 +0100
Re: IDE or AHCI ? Arno <me@privacy.net> - 2012-01-05 08:47 +0000
Re: IDE or AHCI ? "Rod Speed" <rod.speed.aaa@gmail.com> - 2012-01-05 07:51 +1100
Re: IDE or AHCI ? Arno <me@privacy.net> - 2012-01-04 19:16 +0000
Re: IDE or AHCI ? "Rod Speed" <rod.speed.aaa@gmail.com> - 2012-01-05 07:41 +1100
Re: IDE or AHCI ? Yousuf Khan <bbbl67@spammenot.yahoo.com> - 2012-01-05 14:44 -0500
Re: IDE or AHCI ? "Rod Speed" <rod.speed.aaa@gmail.com> - 2012-01-06 17:35 +1100
Re: IDE or AHCI ? Krypsis <krypsis@optusnet.com.au> - 2012-01-07 00:05 +1100
Re: IDE or AHCI ? Arno <me@privacy.net> - 2012-01-06 20:04 +0000
Re: IDE or AHCI ? Mike Tomlinson <mike@jasper.org.uk> - 2012-01-06 21:13 +0000
Re: IDE or AHCI ? cjt <cheljuba@prodigy.net> - 2012-01-06 20:42 -0600
Re: IDE or AHCI ? David Brown <david.brown@removethis.hesbynett.no> - 2012-01-07 13:48 +0100
Re: IDE or AHCI ? Arno <me@privacy.net> - 2012-01-07 14:09 +0000
Re: IDE or AHCI ? Mike Tomlinson <mike@jasper.org.uk> - 2012-01-07 14:36 +0000
Re: IDE or AHCI ? Krypsis <krypsis@optusnet.com.au> - 2012-01-08 02:11 +1100
Re: IDE or AHCI ? Mike Tomlinson <mike@jasper.org.uk> - 2012-01-09 12:06 +0000
Re: IDE or AHCI ? Arno <me@privacy.net> - 2012-01-09 16:27 +0000
Re: IDE or AHCI ? Mike Tomlinson <mike@jasper.org.uk> - 2012-01-09 17:36 +0000
Re: IDE or AHCI ? Mike Tomlinson <mike@jasper.org.uk> - 2012-01-09 17:41 +0000
Re: IDE or AHCI ? Winniethepooh@100acrewoods.net (GMAN) - 2012-01-09 19:07 +0000
Re: IDE or AHCI ? David Brown <david.brown@removethis.hesbynett.no> - 2012-01-09 20:12 +0100
Re: IDE or AHCI ? Mike Tomlinson <mike@jasper.org.uk> - 2012-01-09 21:00 +0000
Re: IDE or AHCI ? Yousuf Khan <bbbl67@spammenot.yahoo.com> - 2012-01-09 11:31 -0500
Re: IDE or AHCI ? David Brown <david.brown@removethis.hesbynett.no> - 2012-01-07 17:10 +0100
Re: IDE or AHCI ? Mike Tomlinson <mike@jasper.org.uk> - 2012-01-10 14:18 +0000
Re: IDE or AHCI ? Yousuf Khan <bbbl67@spammenot.yahoo.com> - 2012-01-09 11:23 -0500
Re: IDE or AHCI ? Arno <me@privacy.net> - 2012-01-09 16:30 +0000
Re: IDE or AHCI ? David Brown <david.brown@removethis.hesbynett.no> - 2012-01-09 20:16 +0100
Re: IDE or AHCI ? cjt <cheljuba@prodigy.net> - 2012-01-09 17:13 -0600
Re: IDE or AHCI ? "Rod Speed" <rod.speed.aaa@gmail.com> - 2012-01-07 08:11 +1100
Re: IDE or AHCI ? Krypsis <krypsis@optusnet.com.au> - 2012-01-08 01:23 +1100
Re: IDE or AHCI ? "Rod Speed" <rod.speed.aaa@gmail.com> - 2012-01-08 06:43 +1100
Re: IDE or AHCI ? JW <none@dev.null> - 2012-01-09 05:23 -0500
Re: IDE or AHCI ? Yousuf Khan <bbbl67@spammenot.yahoo.com> - 2012-01-09 10:24 -0500
Re: IDE or AHCI ? "Rod Speed" <rod.speed.aaa@gmail.com> - 2012-01-10 09:34 +1100
Re: IDE or AHCI ? Yousuf Khan <bbbl67@spammenot.yahoo.com> - 2012-01-09 20:04 -0500
Re: IDE or AHCI ? "Rod Speed" <rod.speed.aaa@gmail.com> - 2012-01-10 15:33 +1100
Re: IDE or AHCI ? Arno <me@privacy.net> - 2012-01-06 09:48 +0000
Re: IDE or AHCI ? Yousuf Khan <bbbl67@spammenot.yahoo.com> - 2012-01-09 11:35 -0500
Re: IDE or AHCI ? David Brown <david.brown@removethis.hesbynett.no> - 2012-01-09 20:23 +0100
Re: IDE or AHCI ? Arno <me@privacy.net> - 2012-01-10 11:31 +0000
Re: IDE or AHCI ? Yousuf Khan <bbbl67@spammenot.yahoo.com> - 2012-01-20 06:54 -0500
Re: IDE or AHCI ? Arno <me@privacy.net> - 2012-01-04 19:14 +0000
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