Re: Bad Hitachi disk.... how so from a pic?

From	Robert Nichols <SEE_SIGNATURE@localhost.localdomain.invalid>
Newsgroups	comp.os.linux.hardware
Subject	Re: Bad Hitachi disk.... how so from a pic?
Date	2014-12-08 08:43 -0600
Organization	Exiguous
Message-ID	<m64deb$mhc$1@omega-3a.local> (permalink)
References	(9 earlier) <m62ec0$2kc1$1@saria.nerim.net> <m62gnd$df2$1@dont-email.me> <m62o9n$2nf2$1@saria.nerim.net> <wwv388qze3z.fsf@l1AntVDjLrnP7Td3DQJ8ynzIq3lJMueXf87AxnpFoA.invalid> <m63ulf$lhv$1@dont-email.me>

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On 12/08/2014 04:31 AM, Aragorn wrote:
 > Command queuing for instance is a controller task, and when it comes to
> IDE disks, the kernel will take care of that.  When it comes to SCSI or
> SAS, the controller card does all of that, leaving the mainboard CPU
> free to do other things.

SATA drives have had Native Command Queuing (NCQ) for some time now.
In fact, one of the problems SSD drives had with the SATA command set
was that the "Trim" command was specified as non-queueable, so if you
had your OS configured to issue a Trim automatically whenever a file
was deleted you took a big performance hit because the whole queue
was blocked while the lengthy Trim command was executed. (This was
corrected in the SATA 3.1 spec, which provides a queued Trim command.)

-- 
Bob Nichols         AT comcast.net I am "RNichols42"

Thread

Bad Hitachi disk.... how so from a pic? Jax <remove.bear.bottoms1@gmail.com> - 2014-12-06 14:44 +0000
  Re: Bad Hitachi disk.... how so from a pic? philo  <philo@privacy.net> - 2014-12-06 09:44 -0600
    Re: Bad Hitachi disk.... how so from a pic? notbob <notbob@nothome.com> - 2014-12-06 19:37 +0000
      Re: Bad Hitachi disk.... how so from a pic? philo  <philo@privacy.net> - 2014-12-06 14:54 -0600
      Re: Bad Hitachi disk.... how so from a pic? Jax <remove.bear.bottoms1@gmail.com> - 2014-12-06 22:50 +0000
        Re: Bad Hitachi disk.... how so from a pic? notbob <notbob@nothome.com> - 2014-12-06 23:13 +0000
      Re: Bad Hitachi disk.... how so from a pic? philo  <philo@privacy.net> - 2014-12-07 04:57 -0600
        Re: Bad Hitachi disk.... how so from a pic? Aragorn <thorongil@telenet.be.invalid> - 2014-12-07 16:52 +0100
          Re: Bad Hitachi disk.... how so from a pic? philo  <philo@privacy.net> - 2014-12-07 09:59 -0600
            Re: Bad Hitachi disk.... how so from a pic? Aragorn <thorongil@telenet.be.invalid> - 2014-12-07 17:10 +0100
              Re: Bad Hitachi disk.... how so from a pic? philo  <philo@privacy.net> - 2014-12-07 10:48 -0600
                Re: Bad Hitachi disk.... how so from a pic? Aragorn <thorongil@telenet.be.invalid> - 2014-12-07 18:37 +0100
                Re: Bad Hitachi disk.... how so from a pic? philo  <philo@privacy.net> - 2014-12-07 12:28 -0600
                Re: Bad Hitachi disk.... how so from a pic? Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2014-12-07 21:46 +0100
                Re: Bad Hitachi disk.... how so from a pic? Aragorn <thorongil@telenet.be.invalid> - 2014-12-07 22:27 +0100
                Re: Bad Hitachi disk.... how so from a pic? Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2014-12-08 00:36 +0100
                Re: Bad Hitachi disk.... how so from a pic? Richard Kettlewell <rjk@greenend.org.uk> - 2014-12-08 09:26 +0000
                Re: Bad Hitachi disk.... how so from a pic? Aragorn <thorongil@telenet.be.invalid> - 2014-12-08 11:31 +0100
                Re: Bad Hitachi disk.... how so from a pic? Richard Kettlewell <rjk@greenend.org.uk> - 2014-12-08 10:53 +0000
                Re: Bad Hitachi disk.... how so from a pic? Aragorn <thorongil@telenet.be.invalid> - 2014-12-08 17:48 +0100
                Re: Bad Hitachi disk.... how so from a pic? Richard Kettlewell <rjk@greenend.org.uk> - 2014-12-08 17:28 +0000
                Re: Bad Hitachi disk.... how so from a pic? Robert Nichols <SEE_SIGNATURE@localhost.localdomain.invalid> - 2014-12-08 08:43 -0600
                Re: Bad Hitachi disk.... how so from a pic? Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2014-12-09 11:02 +0100
                Re: Bad Hitachi disk.... how so from a pic? scott@alfter.diespammersdie.us (Scott Alfter) - 2014-12-09 23:35 +0000
                Re: Bad Hitachi disk.... how so from a pic? philo  <philo@privacy.net> - 2014-12-09 17:43 -0600
                Re: Bad Hitachi disk.... how so from a pic? philo  <philo@privacy.net> - 2014-12-09 17:54 -0600
                Re: Bad Hitachi disk.... how so from a pic? scott@alfter.diespammersdie.us (Scott Alfter) - 2014-12-10 20:22 +0000
                Re: Bad Hitachi disk.... how so from a pic? scott@alfter.diespammersdie.us (Scott Alfter) - 2014-12-10 20:27 +0000
                Re: Bad Hitachi disk.... how so from a pic? philo  <philo@privacy.net> - 2014-12-10 16:40 -0600
                Re: Bad Hitachi disk.... how so from a pic? Thomas Richter <thor@math.tu-berlin.de> - 2014-12-10 11:06 +0100
  Re: Bad Hitachi disk.... how so from a pic? Baho Utot <baho-utot@invalid.com> - 2014-12-06 13:39 -0500
    Re: Bad Hitachi disk.... how so from a pic? Jax <remove.bear.bottoms1@gmail.com> - 2014-12-06 22:51 +0000
  Re: Bad Hitachi disk.... how so from a pic? Johnny <johnny@invalid.net> - 2014-12-06 13:02 -0600
  Re: Bad Hitachi disk.... how so from a pic? Keith Keller <kkeller-usenet@wombat.san-francisco.ca.us> - 2014-12-06 16:04 -0800

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