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computers / alt.os.linux.mageia / Re: is raid installed by default

SubjectAuthor
* is raid installed by defaultfaeychild
+* Re: is raid installed by defaultAragorn
|`- Re: is raid installed by defaultfaeychild
`* Re: is raid installed by defaultDavid W. Hodgins
 +* Re: is raid installed by defaultfaeychild
 |`* Re: is raid installed by defaultDoug Laidlaw
 | `- Re: is raid installed by defaultDavid W. Hodgins
 `- Re: is raid installed by defaultred floyd

1
is raid installed by default

<t64cv8$m3h$1@dont-email.me>

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From: faeych...@nomail.afraid.org (faeychild)
Newsgroups: alt.os.linux.mageia
Subject: is raid installed by default
Date: Thu, 19 May 2022 13:19:01 +1000
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 by: faeychild - Thu, 19 May 2022 03:19 UTC

I am poking through dmesg to pinpoint a problem and I found this

dmesg | grep -i raid
[ 0.162436] raid6: avx2x4 gen() 40069 MB/s
[ 0.179437] raid6: avx2x4 xor() 18405 MB/s
[ 0.196436] raid6: avx2x2 gen() 46932 MB/s
[ 0.213436] raid6: avx2x2 xor() 28318 MB/s
[ 0.230437] raid6: avx2x1 gen() 39386 MB/s
[ 0.247436] raid6: avx2x1 xor() 21443 MB/s
[ 0.264437] raid6: sse2x4 gen() 18615 MB/s
[ 0.281436] raid6: sse2x4 xor() 10823 MB/s
[ 0.298437] raid6: sse2x2 gen() 18897 MB/s
[ 0.315436] raid6: sse2x2 xor() 11622 MB/s
[ 0.332438] raid6: sse2x1 gen() 15950 MB/s
[ 0.349437] raid6: sse2x1 xor() 7860 MB/s
[ 0.349438] raid6: using algorithm avx2x2 gen() 46932 MB/s
[ 0.349439] raid6: .... xor() 28318 MB/s, rmw enabled
[ 0.349441] raid6: using avx2x2 recovery algorithm
[ 2.393424] systemd[1]: Starting Software RAID Monitor Takeover...
[ 2.433872] systemd[1]: Started Software RAID Monitor Takeover.

So I did some investigating and I have "mdadm" installed
/etc/mdadm.conf
/proc/mdstat

But I don't have all files mentioned in man mdadm.
I haven't installed raid per-se but is it a partial install by default

--
faeychild
Running plasmashell 5.20.4 on 5.15.35-desktop-2.mga8 kernel.
Mageia release 8 (Official) for x86_64 installed via Mageia-8-x86_64-DVD.iso

Re: is raid installed by default

<20220519053236.7b6c35e2@nx-74205>

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From: thoron...@telenet.be (Aragorn)
Newsgroups: alt.os.linux.mageia
Subject: Re: is raid installed by default
Date: Thu, 19 May 2022 05:32:36 +0200
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 by: Aragorn - Thu, 19 May 2022 03:32 UTC

On 19.05.2022 at 13:19, faeychild scribbled:

> I am poking through dmesg to pinpoint a problem and I found this
>
> dmesg | grep -i raid
> [ 0.162436] raid6: avx2x4 gen() 40069 MB/s
> [ 0.179437] raid6: avx2x4 xor() 18405 MB/s
> [ 0.196436] raid6: avx2x2 gen() 46932 MB/s
> [ 0.213436] raid6: avx2x2 xor() 28318 MB/s
> [ 0.230437] raid6: avx2x1 gen() 39386 MB/s
> [ 0.247436] raid6: avx2x1 xor() 21443 MB/s
> [ 0.264437] raid6: sse2x4 gen() 18615 MB/s
> [ 0.281436] raid6: sse2x4 xor() 10823 MB/s
> [ 0.298437] raid6: sse2x2 gen() 18897 MB/s
> [ 0.315436] raid6: sse2x2 xor() 11622 MB/s
> [ 0.332438] raid6: sse2x1 gen() 15950 MB/s
> [ 0.349437] raid6: sse2x1 xor() 7860 MB/s
> [ 0.349438] raid6: using algorithm avx2x2 gen() 46932 MB/s
> [ 0.349439] raid6: .... xor() 28318 MB/s, rmw enabled
> [ 0.349441] raid6: using avx2x2 recovery algorithm
> [ 2.393424] systemd[1]: Starting Software RAID Monitor Takeover...
> [ 2.433872] systemd[1]: Started Software RAID Monitor Takeover.
>
>
> So I did some investigating and I have "mdadm" installed
> /etc/mdadm.conf
> /proc/mdstat
>
> But I don't have all files mentioned in man mdadm.
> I haven't installed raid per-se but is it a partial install by default

It may be the result of your hard drive or SSD being listed as a RAID
device in the UEFI or BIOS. The kernel might detect that and load the
RAID module.

If you really had a RAID-6 configuration, you'd know about it,
wouldn't you? RAID-6 doesn't exactly set itself up automatically. ;)

--
With respect,
= Aragorn =

Re: is raid installed by default

<t64jab$8ho$1@dont-email.me>

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From: faeych...@nomail.afraid.org (faeychild)
Newsgroups: alt.os.linux.mageia
Subject: Re: is raid installed by default
Date: Thu, 19 May 2022 15:07:20 +1000
Organization: A noiseless patient Spider
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 by: faeychild - Thu, 19 May 2022 05:07 UTC

On 19/5/22 13:32, Aragorn wrote:

>
> It may be the result of your hard drive or SSD being listed as a RAID
> device in the UEFI or BIOS. The kernel might detect that and load the
> RAID module.

Next boot then. I will check
>
> If you really had a RAID-6 configuration, you'd know about it,
> wouldn't you? RAID-6 doesn't exactly set itself up automatically. ;)
>
>
>

Absolutely true Hence the head scratching.

There are other odd occurrences I was looking into and then I blundered
into the raid references. Got worried :-)

Regards
--
faeychild
Running plasmashell 5.20.4 on 5.15.35-desktop-2.mga8 kernel.
Mageia release 8 (Official) for x86_64 installed via Mageia-8-x86_64-DVD.iso

Re: is raid installed by default

<op.1meirahja3w0dxdave@hodgins.homeip.net>

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From: dwhodg...@nomail.afraid.org (David W. Hodgins)
Newsgroups: alt.os.linux.mageia
Subject: Re: is raid installed by default
Date: Thu, 19 May 2022 01:55:48 -0400
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 by: David W. Hodgins - Thu, 19 May 2022 05:55 UTC

On Wed, 18 May 2022 23:19:01 -0400, faeychild <faeychild@nomail.afraid.org> wrote:

>
> I am poking through dmesg to pinpoint a problem and I found this
>
> dmesg | grep -i raid
> [ 0.162436] raid6: avx2x4 gen() 40069 MB/s
> [ 0.179437] raid6: avx2x4 xor() 18405 MB/s
> [ 0.196436] raid6: avx2x2 gen() 46932 MB/s
> [ 0.213436] raid6: avx2x2 xor() 28318 MB/s
> [ 0.230437] raid6: avx2x1 gen() 39386 MB/s
> [ 0.247436] raid6: avx2x1 xor() 21443 MB/s
> [ 0.264437] raid6: sse2x4 gen() 18615 MB/s
> [ 0.281436] raid6: sse2x4 xor() 10823 MB/s
> [ 0.298437] raid6: sse2x2 gen() 18897 MB/s
> [ 0.315436] raid6: sse2x2 xor() 11622 MB/s
> [ 0.332438] raid6: sse2x1 gen() 15950 MB/s
> [ 0.349437] raid6: sse2x1 xor() 7860 MB/s
> [ 0.349438] raid6: using algorithm avx2x2 gen() 46932 MB/s
> [ 0.349439] raid6: .... xor() 28318 MB/s, rmw enabled
> [ 0.349441] raid6: using avx2x2 recovery algorithm
> [ 2.393424] systemd[1]: Starting Software RAID Monitor Takeover...
> [ 2.433872] systemd[1]: Started Software RAID Monitor Takeover.
>
>
> So I did some investigating and I have "mdadm" installed
> /etc/mdadm.conf
> /proc/mdstat
>
> But I don't have all files mentioned in man mdadm.
> I haven't installed raid per-se but is it a partial install by default

The raid6 messages are generated by the kernel as it finds the sata controller
is capable of supporting it. That doesn't indicate it's being used. Normally
the sata controller will be set up to use achi (Advanced Host Controller Interface)
mode rather then raid.

Packages such as mdadm, lvm, etc. are included in all of the regular iso images
and installed by default because if you are installing over an existing raid or
lvm install, they are needed. They do no harm if not actually being used other
a few messages in the journal.

Regards, Dave Hodgins

Re: is raid installed by default

<t64qdc$bg6$1@dont-email.me>

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From: faeych...@nomail.afraid.org (faeychild)
Newsgroups: alt.os.linux.mageia
Subject: Re: is raid installed by default
Date: Thu, 19 May 2022 17:08:25 +1000
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 by: faeychild - Thu, 19 May 2022 07:08 UTC

On 19/5/22 15:55, David W. Hodgins wrote:

> lvm install, they are needed. They do no harm if not actually being used
> other
> a few messages in the journal.
>
> Regards, Dave Hodgins

My suspicions were in that orientation but it's nice get confirmation

Regards
--
faeychild
Running plasmashell 5.20.4 on 5.15.35-desktop-2.mga8 kernel.
Mageia release 8 (Official) for x86_64 installed via Mageia-8-x86_64-DVD.iso

Re: is raid installed by default

<t66dj5$13fg$1@gioia.aioe.org>

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From: laidl...@hotkey.net.au (Doug Laidlaw)
Newsgroups: alt.os.linux.mageia
Subject: Re: is raid installed by default
Date: Fri, 20 May 2022 07:41:56 +1000
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 by: Doug Laidlaw - Thu, 19 May 2022 21:41 UTC

On 19/5/22 17:08, faeychild wrote:
> On 19/5/22 15:55, David W. Hodgins wrote:
>
>> lvm install, they are needed. They do no harm if not actually being
>> used other
>> a few messages in the journal.
>>
>> Regards, Dave Hodgins
>
>
>
> My suspicions were in that orientation but it's nice get confirmation
>
> Regards

My 2 inch solid-state drive that has never been detected by any OS still
makes RAID try about 4 times to load it, so RAID must see it as a drive.
I have always associated RAID with multiple drive scenarios, but this
thread suggests that RAID is of more general application. What exactly
is it?

TIA,

Doug.

Re: is raid installed by default

<op.1mfuzveza3w0dxdave@hodgins.homeip.net>

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From: dwhodg...@nomail.afraid.org (David W. Hodgins)
Newsgroups: alt.os.linux.mageia
Subject: Re: is raid installed by default
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 by: David W. Hodgins - Thu, 19 May 2022 23:17 UTC

On Thu, 19 May 2022 17:41:56 -0400, Doug Laidlaw <laidlaws@hotkey.net.au> wrote:
> My 2 inch solid-state drive that has never been detected by any OS still
> makes RAID try about 4 times to load it, so RAID must see it as a drive.
> I have always associated RAID with multiple drive scenarios, but this
> thread suggests that RAID is of more general application. What exactly
> is it?

It is a multi-drive utility.

What messages are you seeing to indicate it's trying to initiate a raid setup?
The "kernel raid6" messages are just indicating the sata controller(s) can
be used as raid controller(s).

Regards, Dave Hodgins

Re: is raid installed by default

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Newsgroups: alt.os.linux.mageia
Subject: Re: is raid installed by default
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 by: red floyd - Thu, 19 May 2022 23:43 UTC

On 5/18/2022 10:55 PM, David W. Hodgins wrote:
> thread redacted
>

This, of course, begs the question, why do computers with a single drive
slot default to a "RAID" setting instead of AHCI? I'm talking to you,
Dell.

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