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

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Carlos E.R. <robin_listas@invalid.es> wrote:
> On 2016-05-29 07:41, Mike Spencer wrote:

> > Capabilities:
> >     LBA, IORDY(can be disabled)
> >     Queue depth: 32
> >     Standby timer values: spec'd by Standard, no device specific minimum
> >     R/W multiple sector transfer: Max = 16  Current = 16
> >     Recommended acoustic management value: 208, current value: 0
> >     DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 *udma5 udma6
> >          Cycle time: min=120ns recommended=120ns

> You are using "udma5", it seems.
> My SATA drives use "udma6", but my kernel is way more recent, too.

> I have a pentium IV machine running, with an IDE PATA drive. It uses
> udma5, with a recent kernel. I'll post most relevant output so that you
> can compare.

> Capabilities:
>         LBA, IORDY(can be disabled)
>         Standby timer values: spec'd by Vendor, no device specific minimum
>         R/W multiple sector transfer: Max = 16  Current = 16
>         Advanced power management level: 254
>         Recommended acoustic management value: 128, current value: 254
>         DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 *udma5
>              Cycle time: min=120ns recommended=120ns
>         PIO: pio0 pio1 pio2 pio3 pio4
>              Cycle time: no flow control=240ns  IORDY flow control=120ns
> Commands/features:
>         Enabled Supported:
>            *    SMART feature set
>                 Security Mode feature set
>            *    Power Management feature set
>            *    Write cache
>            *    Look-ahead
>            *    Host Protected Area feature set
>            *    WRITE_BUFFER command
>            *    READ_BUFFER command
>            *    NOP cmd
>            *    DOWNLOAD_MICROCODE
>            *    Advanced Power Management feature set
>                 Power-Up In Standby feature set
>            *    SET_FEATURES required to spinup after power up
>                 Address Offset Reserved Area Boot
>                 SET_MAX security extension
>                 Automatic Acoustic Management feature set
>            *    48-bit Address feature set
>            *    Device Configuration Overlay feature set
>            *    Mandatory FLUSH_CACHE
>            *    FLUSH_CACHE_EXT
>            *    SMART error logging
>            *    SMART self-test
>            *    General Purpose Logging feature set
>            *    WRITE_{DMA|MULTIPLE}_FUA_EXT
>            *    64-bit World wide name
>            *    IDLE_IMMEDIATE with UNLOAD


> Speed test (busy machine):

> AmonLanc:~ # hdparm -tT /dev/sda

> /dev/sda:
>  Timing cached reads:   790 MB in  2.00 seconds = 394.57 MB/sec
>  Timing buffered disk reads: 132 MB in  3.00 seconds =  43.93 MB/sec
> AmonLanc:~ #


> As you can see, PATA is slow, compared to SATA (44 MB/S)

Yep, PATA is older than SATA. IIRC, PATA is basically IDE?
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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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