Date: Wed, 4 May 2016 08:24:24 +0000 (UTC) From: Mikhail Zakharov <zmey20000@yahoo.com> To: FreeBSD Questions Mailing List <freebsd-questions@freebsd.org> Subject: Re: FreeBSD reliable dual-controller storage architecture contept Message-ID: <582198723.7438364.1462350264479.JavaMail.yahoo@mail.yahoo.com> In-Reply-To: <609769253.4003715.1461843323413.JavaMail.yahoo@mail.yahoo.com> References: <609769253.4003715.1461843323413.JavaMail.yahoo@mail.yahoo.com>
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This is the second paper on the subject. Now we will try to add ZFS to our =
system. See the result.=20
On Thursday, April 28, 2016 1:40 PM, Mikhail Zakharov via freebsd-quest=
ions <freebsd-questions@freebsd.org> wrote:
=20
Sharing my exploration on FreeBSD reliable dual-controller storage archite=
cture contept.=EF=BB=BF Free to discuss and test.
The BeaST
| =C2=A0 |
| =C2=A0 |=C2=A0 | =C2=A0 | =C2=A0 | =C2=A0 | =C2=A0 | =C2=A0 |
| The BeaSTThe BeaST is the FreeBSD based dual-controller reliable storage =
system concept with aim to implement ZFS and in-memory cache. FreeBSD based=
dual-controller storage ... |
|=C2=A0 |
| =D0=9F=D1=80=D0=BE=D1=81=D0=BC=D0=BE=D1=82=D1=80=D0=B5=D1=82=D1=8C =D0=BD=
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Date: Wed, 4 May 2016 08:28:06 +0000 (UTC)
From: Mikhail Zakharov <zmey20000@yahoo.com>
Reply-To: Mikhail Zakharov <zmey20000@yahoo.com>
To: Mikhail Zakharov <zmey20000@yahoo.com>,
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Subject: Re: FreeBSD reliable dual-controller storage architecture contept
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Beautiful. I have lost the link once again. https://mezzantrop.wordpress.co=
m/2016/05/04/adding-zfs-to-the-freebsd-dual-controller-storage-concept/
=20
On Wednesday, May 4, 2016 10:24 AM, Mikhail Zakharov via freebsd-questi=
ons <freebsd-questions@freebsd.org> wrote:
=20
This is the second paper on the subject. Now we will try to add ZFS to our=
system. See the result.=20
=C2=A0 =C2=A0 On Thursday, April 28, 2016 1:40 PM, Mikhail Zakharov via fre=
ebsd-questions <freebsd-questions@freebsd.org> wrote:
=20
Sharing my exploration on FreeBSD reliable dual-controller storage archite=
cture contept.=EF=BB=BF Free to discuss and test.
The BeaST
| =C2=A0 |
| =C2=A0 |=C2=A0 | =C2=A0 | =C2=A0 | =C2=A0 | =C2=A0 | =C2=A0 |
| The BeaSTThe BeaST is the FreeBSD based dual-controller reliable storage =
system concept with aim to implement ZFS and in-memory cache. FreeBSD based=
dual-controller storage ... |
|=C2=A0 |
| =D0=9F=D1=80=D0=BE=D1=81=D0=BC=D0=BE=D1=82=D1=80=D0=B5=D1=82=D1=8C =D0=BD=
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| =C2=A0 |
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Date: Wed, 4 May 2016 09:34:07 +0100
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Subject: Re: Is 10.3 i386 jinxed ?
From: krad <kraduk@gmail.com>
To: Polytropon <freebsd@edvax.de>
Cc: Manish Jain <bourne.identity@hotmail.com>,
FreeBSD Questions <freebsd-questions@freebsd.org>, galtsev@kicp.uchicago.edu
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usually there is an option in the bios somewhere to alter the allocation of
ram to the video card. It can usually go from 64M-256M. Set it to the
lowest setting to present as much of the ram to the OS. Then run memtest
again. You may get different results.
On 4 May 2016 at 09:20, Polytropon <freebsd@edvax.de> wrote:
> On Wed, 4 May 2016 12:41:06 +0530, Manish Jain wrote:
> > On 05/04/16 10:35, Warren Block wrote:
> > > On Wed, 4 May 2016, Manish Jain wrote:
> > >
> > >> What is printed underneath is NE56R14l-B9502G32Mnks
> > >>
> > >> I can't be sure whether the l is actually l or I or 1
> > >
> > > Looks like this one:
> > > http://in.gateway.com/gw/en/IN/content/model/NX.Y1USI.005
> > >
> > > Which does not have a separate GPU, and means that the bad memory
> > > would be in one of the removable DIMMs.
> > >
> > >
> >
> >
> > Something to cheer about, at last. But then why does not memtest86+ pick
> > up any errors in 65 passes ?
>
> As I mentioned earlier, this is a "false-negative" result. The portions
> of the RAM dedicated for the GPU are "cut away" quite eary, so memtest
> can only test what's left for "normal RAM". And those portions don't seem
> to have the error. The "GPU RAM" portions cannot be tested with memtest
> because it cannot access them: To the memtest access routine, the situation
> is as follows: Let's say there are 4 GB RAM, 1 GB dedicated for GPU, so
> for memtest there's 3 GB RAM to check. _Where_ this is located - well,
> that depends on how the system BIOS/EFI decides on where to place the
> GPU RAM segment ("internal addressing"). Let's assume you have two chips
> of 2 GB each, this _could_ be the layout:
>
> +--------------------+
> Bank 0: |VVVFVVVVVV | 2 GB
> +----------^---------+
> RAM address 00000000 here
>
> +--------------------+
> Bank 1: | | 2 GB
> +--------------------+
>
> Then memtest will check from 00000000 to the end of the 3 GB RAM, and
> the fault (F) is within the GPU RAM (V). It won't be tested.
>
> Maybe you could just swap the modules an re-run the test. However, it's
> hard to say _where_ the GPU RAM will end up, maybe at the beginning of
> bank 1? Maybe a "random choice"? Or maybe it isn't even one contiguous
> memory space?
>
>
> --
> Polytropon
> Magdeburg, Germany
> Happy FreeBSD user since 4.0
> Andra moi ennepe, Mousa, ...
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