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Groups > comp.os.linux.hardware > #3108

Re: SATA->IDE emulation on IBM P4 bogs down on HD writes

From Henrik Carlqvist <Henrik.Carlqvist@deadspam.com>
Newsgroups comp.os.linux.hardware
Subject Re: SATA->IDE emulation on IBM P4 bogs down on HD writes
Date 2016-05-28 11:09 +0000
Organization A noiseless patient Spider
Message-ID <nibu9f$eis$1@dont-email.me> (permalink)
References <87a8jl7htw.fsf@bogus.nodomain.nowhere> <41oe1d-dje.ln1@Telcontar.valinor> <87inxy8xtd.fsf@bogus.nodomain.nowhere>

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On Sat, 28 May 2016 04:07:58 -0300, Mike Spencer wrote:
> The bogging down only occurs during writes to the main SATA HD
> connected to the "SATA IDE" plug on the mobo.

My guess is that your bad performance is explained by lack of DMA. You 
could verify that guess by studying the output of

hdparm -i /dev/hda

You will probably get better performance with DMA if you instead use your 
SATA drive in SATA mode. That could probably be accomplished by changing 
some setting in your CMOS setup. My guess is that you now have a setting 
which might be named something like "legacy" or "IDE" when you instead 
shoule have a setting named something like "SATA" or "AHCI".

Once that setting is changed your kernel might instead see your drive as 
/dev/sda instead of /dev/hda. As such you might have to reconfigure your 
/etc/fstab and/or your bootloader.

regards Henrik
-- 
The address in the header is only to prevent spam. My real address is:
hc351(at)poolhem.se Examples of addresses which go to spammers:
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Thread

SATA->IDE emulation on IBM P4 bogs down on HD writes Mike Spencer <mds@bogus.nodomain.nowhere> - 2016-05-19 20:23 -0300
  Re: SATA->IDE emulation on IBM P4 bogs down on HD writes Bobbie Sellers <bliss-sf4ever@dslextreme.com> - 2016-05-19 16:32 -0700
    Re: SATA->IDE emulation on IBM P4 bogs down on HD writes Mike Spencer <mds@bogus.nodomain.nowhere> - 2016-05-20 12:28 -0300
      Re: SATA->IDE emulation on IBM P4 bogs down on HD writes Bobbie Sellers <bliss-sf4ever@dslextreme.com> - 2016-05-20 09:10 -0700
  Re: SATA->IDE emulation on IBM P4 bogs down on HD writes Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2016-05-22 11:37 +0200
  Re: SATA->IDE emulation on IBM P4 bogs down on HD writes "Carlos E.R." <robin_listas@invalid.es> - 2016-05-24 21:52 +0200
    Re: SATA->IDE emulation on IBM P4 bogs down on HD writes Mike Spencer <mds@bogus.nodomain.nowhere> - 2016-05-28 04:07 -0300
      Re: SATA->IDE emulation on IBM P4 bogs down on HD writes Henrik Carlqvist <Henrik.Carlqvist@deadspam.com> - 2016-05-28 11:09 +0000
        Re: SATA->IDE emulation on IBM P4 bogs down on HD writes "Carlos E.R." <robin_listas@invalid.es> - 2016-05-28 17:12 +0200
        Re: SATA->IDE emulation on IBM P4 bogs down on HD writes Mike Spencer <mds@bogus.nodomain.nowhere> - 2016-05-29 01:50 -0300
          Re: SATA->IDE emulation on IBM P4 bogs down on HD writes ANTant@zimage.com (Ant) - 2016-05-29 11:41 -0500
        Re: SATA->IDE emulation on IBM P4 bogs down on HD writes Mike Spencer <mds@bogus.nodomain.nowhere> - 2016-05-29 02:41 -0300
          Re: SATA->IDE emulation on IBM P4 bogs down on HD writes "Carlos E.R." <robin_listas@invalid.es> - 2016-05-29 14:06 +0200
            Re: SATA->IDE emulation on IBM P4 bogs down on HD writes ANTant@zimage.com (Ant) - 2016-05-29 11:42 -0500
              Re: SATA->IDE emulation on IBM P4 bogs down on HD writes "Carlos E.R." <robin_listas@invalid.es> - 2016-05-29 21:09 +0200
                Re: SATA->IDE emulation on IBM P4 bogs down on HD writes Aragorn <thorongil@telenet.be.invalid> - 2016-05-30 10:57 +0200
                Re: SATA->IDE emulation on IBM P4 bogs down on HD writes "Carlos E.R." <robin_listas@invalid.es> - 2016-05-30 14:21 +0200
                Re: SATA->IDE emulation on IBM P4 bogs down on HD writes Aragorn <thorongil@telenet.be.invalid> - 2016-05-30 15:49 +0200

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