RAID-5 expansion / harddisk replacement (with bigger disks) w ithout total data-loss

Nicolai Schleifer schleifer at chamaeleon.de
Wed Aug 20 07:14:00 CDT 2003


Will do so. Thanks again, a lot, for the expert advice! :)


Greetings Nicolai

On Tue, 19 Aug 2003 16:47:55 -0600
Pete Burris <Pete.Burris at timera.com> wrote:

> There's an old saying, Nicolai:
> 
> "Don't strain at a gnat and swallow a camel."
> 
> Good luck trying to save time, but as expressed several times here by
> highly-experienced SAs (with the scars to show for it, no doubt), you will
> ultimately save yourself a lot of trouble by just backing up, building a new
> partition from the new disks, and restoring.
> 
> Pete
> 
> -----Original Message-----
> From: Nicolai Schleifer [mailto:schleifer at chamaeleon.de] 
> Sent: Tuesday, August 19, 2003 7:18 AM
> To: linux-poweredge at dell.com
> Subject: Re: RAID-5 expansion / harddisk replacement (with bigger disks)
> without total data-loss
> 
> Hehe, I forgot some probably vital information...
> 
> It's some DELL PE2k with a PERC 3/Di, running some Red Hat.
> 
> I suppose it would be possible to use parted or smth. similar to increase
> the size of the partition from the operating system's view.
> 
> If only the PERC could handle the resizing of the container and, of course,
> the replacement of the harddisks.
> 
> I want to do it without downtime, if that's possible. I already prepared
> possibilities to do it with downtime, but I don't see that need to be with
> downtime.
> 
> 
> Greetings
> Nicolai
> 
> On Tue, 19 Aug 2003 12:49:15 +0200
> Nicolai Schleifer <schleifer at chamaeleon.de> wrote:
> 
> > Hello,
> > 
> > I'd like to replace the four 9GB harddisks of container 1 in the example
> > below against 36GB harddisks without having a total data loss of that
> > container. The goal is to extend the overall size of that container from
> "(4 time 9GB)-raid-5_overhead" to "(4 times 36GB)-raid-5_overhead".
> > 
> > I think it should be possible, by first replacing all the 9GB harddisks,
> > one by one (like if they were broken and needed to be replaced) and after
> that by extending the container's size to the full extent that should be
> possible by then (found hints about that, using afacli commands "container
> reconfigure"/"container extend").
> > 
> > I'm currently reading this mailinglist about my planned expansion task,
> > to various different results. I can't find an example on the list which
> > matches my task. Any hints?
> > 
> > Example Configuration:
> > AFA0> container list
> > Executing: container list
> > Num          Total  Oth Chunk          Scsi   Partition
> > Label Type   Size   Ctr Size   Usage   B:ID:L Offset:Size
> > ----- ------ ------ --- ------ ------- ------ -------------
> >  0    Mirror 8.47GB            Open    0:00:0 64.0KB:8.47GB 
> >  /dev/sda             SYSTEM           0:01:0 64.0KB:8.47GB 
> > 
> >  1    RAID-5 25.4GB       64KB Open    0:02:0 64.0KB:8.47GB 
> >  /dev/sdb             DATA             0:03:0 64.0KB:8.47GB 
> >                                        0:04:0 64.0KB:8.47GB 
> >                                        0:05:0 64.0KB:8.47GB 
> > 
> > Maybe someone can tell me if it's possible at all. A recipe on how to do
> it would even be greater.
> > 
> > Thank you! :)
> > 
> > 
> > Greetings Nicolai
> > -- 
> > Nicolai Schleifer
> > Chamaeleon Aktiengesellschaft
> > fur innovative Netzlosungen
> > Robert-Bosch-Str. 12 / Haus IV
> > D-56410 Montabaur
> > Hotline:  +49 26 02 - 10 16 9 - 160
> > Zentrale: +49 26 02 - 10 16 9 - 0
> > Fax:      +49 26 02 - 10 16 9 - 101
> > Funk:     +49 177 - 32 08 60 7
> > Email: schleifer at chamaeleon.de
> > http://www.chamaeleon.de
> > 
> > _______________________________________________
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> > Linux-PowerEdge at dell.com
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> > Please read the FAQ at http://lists.us.dell.com/faq or search the list
> archives at http://lists.us.dell.com/htdig/
> 
> 
> -- 
> Nicolai Schleifer
> Chamaeleon Aktiengesellschaft
> fur innovative Netzlosungen
> Robert-Bosch-Str. 12 / Haus IV
> D-56410 Montabaur
> Hotline:  +49 26 02 - 10 16 9 - 160
> Zentrale: +49 26 02 - 10 16 9 - 0
> Fax:      +49 26 02 - 10 16 9 - 101
> Funk:     +49 177 - 32 08 60 7
> Email: schleifer at chamaeleon.de
> http://www.chamaeleon.de
> 
> _______________________________________________
> Linux-PowerEdge mailing list
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> Please read the FAQ at http://lists.us.dell.com/faq or search the list
> archives at http://lists.us.dell.com/htdig/
> 
> _______________________________________________
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-- 
Nicolai Schleifer
Chamaeleon Aktiengesellschaft
fur innovative Netzlosungen
Robert-Bosch-Str. 12 / Haus IV
D-56410 Montabaur
Hotline:  +49 26 02 - 10 16 9 - 160
Zentrale: +49 26 02 - 10 16 9 - 0
Fax:      +49 26 02 - 10 16 9 - 101
Funk:     +49 177 - 32 08 60 7
Email: schleifer at chamaeleon.de
http://www.chamaeleon.de




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