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

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On 05/20/2016 08:28 AM, Mike Spencer wrote:
> Bobbie Sellers <bliss-sf4ever@dslextreme.com> writes:
>
>> On 05/19/2016 04:23 PM, Mike Spencer wrote:
>>
>>> This probably isn't a hardware matter per se but maybe a hardware
>>> wizard here will have a solution.
>>>
>>> IBM P4 desktop came with an IDE HD.  HD failed.  Mobo has two plugs
>>> labeled "SATA IDE n" where n is "1" and "2".  Plugging a SATA drive
>>> into one of those (suitable cable and power adapter) results in the
>>> SATA drive being seen by Linux as hda. (?!) It works just fine in
>>> every respect except one:
>>
>> Not a wizard but a simple minded person who has to ask
>> why not A) get a SATA interface for the machine and plug it in.
>> B) buy a true IDE drive to your boot drive.
>> <ide hard drives for sale>
>
>   A) Seems like overkill for an old machine. What would that be, a
>      card that plus into a  slot?  Jeez, the  IBM mobo *has* SATA
>      plugs that work *almost* perfectly.

	Almost and work perfectly are not the same as working perfectly
but it seems cheaper to me than the alternative.
>
>   B) Done that.  Nobody on my manor has new IDE drives for sale but a
>      friend had a 500G IDE HD with only a few hours' uptime on it.
>      Tedious process of backing up his data, re-partitioning,
>      re-installing Slackware etc. etc. Ongoing.  RSN.

	Well I expected the use of some Search Engine and a credit card.

	I pay cash only to salvagers which got me one working machine
and one which nearly boots.  The culprit is Windows 10 which was 
installed on a machine never certified for it.  It has locked the
BIOS so that it is not displayed.  Even after removing it from the
machine the BIOS is locked.  But it almost boots. ;^(

>
> It would still be nice to tweak the SATA->IDE emulation into
> submission.

	Yes and it would be nice IF I can figure out how to
remove the locked BIOS and put an unlocked BIOS on it.
>
> Thanks for paying attention.

	You are welcome, if I had anything better to do I would be
away doing it.

>
>>> Large writes to the HD, e.g. cp bigfile-from-foo /dir/on/HD, runs as
>>> expected for a few seconds, then the system bogs down.  X cursor gets
>>> jerky, key strokes may take a minute to elicit visible response.
>>> Copy proceeds at an acceptable speed but the box is unusable until the
>>> copy is finished and sync'd.
>>>
>>> This happens for any foo from which bigfile is copied -- USB thumb
>>> drive, HD mounted over USB or another partition on the HD.  Does *not*
>>> happen with no HD writes, viz. cp /dir/on/HD/bigfile /mnt/usb/other-media
>>> or cp /mnt/usb/thumb/bigfile /mnt/usb2/other-thumb.
>>>
>>> I've tried various things -- tweaking bits in /proc/... according to
>>> Documentation/sysctl/vm.txt, runnning mbuffer. Looks (to me; but what
>>> do I know?) like RAM is filling up with reads and stays filled up
>>> until writes to HD are completed.
>>>
>>> Aynone know about this?
>>>
>>> Using SLackware 11 with 2.4.33 kernel.  A (much) newer kernel might
>>> very well fix it.  I need to continue with the 2.4 kernel on this box.
>> 	
>> 	Better buy that IDE hard drive then.
	
	bliss
	

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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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