Slackware and RAID

Slackware and RAID

[Dexter Filmore]

Is anyone here who runs a soft raid on Slackware?
Out of the box there are no raid scripts, the ones I made myself seem a little 
rawish, barely more than mdadm --assemble/--stop.

-- 
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Version: 3.12
GCS d--(+)@ s-:+ a- C++++ UL++ P+>++ L+++>++++ E-- W++ N o? K-
w--(---) !O M+ V- PS+ PE Y++ PGP t++(---)@ 5 X+(++) R+(++) tv--(+)@ 
b++(+++) DI+++ D- G++ e* h>++ r* y?
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http://www.stop1984.com
http://www.againsttcpa.com

Re: Slackware and RAID

[Bill Davidsen]

Dexter Filmore wrote:

>Is anyone here who runs a soft raid on Slackware?
>Out of the box there are no raid scripts, the ones I made myself seem a little 
>rawish, barely more than mdadm --assemble/--stop.
>
>  
>
I'm pretty much off Slack now, but I have run, the scripts you describe 
are about 2/3 of what you need, see the thread(s) here about monitoring. 
mdadm doesn't need a lot of direction...

-- 
bill davidsen <davidsen@tmr.com>
  CTO TMR Associates, Inc
  Doing interesting things with small computers since 1979

Re: Slackware and RAID

[Dexter Filmore]

Am Samstag, 16. September 2006 19:26 schrieb Bill Davidsen:
> Dexter Filmore wrote:
> >Is anyone here who runs a soft raid on Slackware?
> >Out of the box there are no raid scripts, the ones I made myself seem a
> > little rawish, barely more than mdadm --assemble/--stop.
>
> I'm pretty much off Slack now, but I have run, the scripts you describe
> are about 2/3 of what you need, see the thread(s) here about monitoring.
> mdadm doesn't need a lot of direction...

What's the remaining third?
I fumbled it into rc.S and rc.6, reason why I ask is that array degraded about 
6 times in the few months I run it and I can't figure why. Only thing I know 
is that it degrades somewhere in the reboot process, so I suspect it might 
not properly shutdown.

Dex


-- 
-----BEGIN GEEK CODE BLOCK-----
Version: 3.12
GCS d--(+)@ s-:+ a- C++++ UL++ P+>++ L+++>++++ E-- W++ N o? K-
w--(---) !O M+ V- PS+ PE Y++ PGP t++(---)@ 5 X+(++) R+(++) tv--(+)@ 
b++(+++) DI+++ D- G++ e* h>++ r* y?
------END GEEK CODE BLOCK------

http://www.stop1984.com
http://www.againsttcpa.com

Re: Slackware and RAID

[Gordon Henderson]

On Sat, 16 Sep 2006, Dexter Filmore wrote:

> Am Samstag, 16. September 2006 19:26 schrieb Bill Davidsen:
> > Dexter Filmore wrote:
> > >Is anyone here who runs a soft raid on Slackware?
> > >Out of the box there are no raid scripts, the ones I made myself seem a
> > > little rawish, barely more than mdadm --assemble/--stop.
> >
> > I'm pretty much off Slack now, but I have run, the scripts you describe
> > are about 2/3 of what you need, see the thread(s) here about monitoring.
> > mdadm doesn't need a lot of direction...
>
> What's the remaining third?
> I fumbled it into rc.S and rc.6, reason why I ask is that array degraded about
> 6 times in the few months I run it and I can't figure why. Only thing I know
> is that it degrades somewhere in the reboot process, so I suspect it might
> not properly shutdown.

Have you tried simply setting the partition types to 0xFD and relying on
the kernel auto-detect?

I read here that there seems to be some resistance to this method though,
but I've been using it for many years without any issues - however I'm not
doing any thing "clever" like LVM or RAID on RAID (RAID1+0, etc.)

Gordon

Re: Slackware and RAID

[Dexter Filmore]

> > What's the remaining third?
> > I fumbled it into rc.S and rc.6, reason why I ask is that array degraded
> > about 6 times in the few months I run it and I can't figure why. Only
> > thing I know is that it degrades somewhere in the reboot process, so I
> > suspect it might not properly shutdown.
>
> Have you tried simply setting the partition types to 0xFD and relying on
> the kernel auto-detect?
>
> I read here that there seems to be some resistance to this method though,
> but I've been using it for many years without any issues - however I'm not
> doing any thing "clever" like LVM or RAID on RAID (RAID1+0, etc.)

That's what I actually do: one big 0xFD partition per disk, raid5, lvm2, 3x 
xfs.
I run the array with
mdadm --assemble /dev/md0
and stop it with 
mdadm --stop --scan
after fs are unmounted and LVM is deactivated.


-- 
-----BEGIN GEEK CODE BLOCK-----
Version: 3.12
GCS d--(+)@ s-:+ a- C++++ UL++ P+>++ L+++>++++ E-- W++ N o? K-
w--(---) !O M+ V- PS+ PE Y++ PGP t++(---)@ 5 X+(++) R+(++) tv--(+)@ 
b++(+++) DI+++ D- G++ e* h>++ r* y?
------END GEEK CODE BLOCK------

http://www.stop1984.com
http://www.againsttcpa.com

Re: Slackware and RAID

[Bill Davidsen]

Dexter Filmore wrote:

>Am Samstag, 16. September 2006 19:26 schrieb Bill Davidsen:
>  
>
>>Dexter Filmore wrote:
>>    
>>
>>>Is anyone here who runs a soft raid on Slackware?
>>>Out of the box there are no raid scripts, the ones I made myself seem a
>>>little rawish, barely more than mdadm --assemble/--stop.
>>>      
>>>
>>I'm pretty much off Slack now, but I have run, the scripts you describe
>>are about 2/3 of what you need, see the thread(s) here about monitoring.
>>mdadm doesn't need a lot of direction...
>>    
>>
>
>What's the remaining third?
>  
>
Monitoring... where I pointed you.

>I fumbled it into rc.S and rc.6, reason why I ask is that array degraded about 
>6 times in the few months I run it and I can't figure why. Only thing I know 
>is that it degrades somewhere in the reboot process, so I suspect it might 
>not properly shutdown.
>

Since I haven't had problems I'll pass on trying to guess what's 
happening. When I have any problem usually a whole drive hits the floor, 
and I know what to fix and how. I assume you look at mdstat after boot? 
If it's clean before you shut down and dirty on boot, something isn't 
shutting down clean, OR that autodetect stuff isn't working as you want 
it to. I do NOT run lvm, I avoid stuff like that unless I really need it.

-- 
bill davidsen <davidsen@tmr.com>
  CTO TMR Associates, Inc
  Doing interesting things with small computers since 1979