All of lore.kernel.org
 help / color / mirror / Atom feed
From: Lars Marowsky-Bree <lmb@suse.de>
To: anthony mayes <anmayes@siue.edu>, linux-raid@vger.kernel.org
Subject: Re: raid0 + raid1 question
Date: Thu, 9 Oct 2003 11:55:00 +0200	[thread overview]
Message-ID: <20031009095500.GA20643@marowsky-bree.de> (raw)
In-Reply-To: <3F84793F.6060400@siue.edu>

On 2003-10-08T15:53:19,
   anthony mayes <anmayes@siue.edu> said:

> I have 7 disks in an x86 box.  I want to have 2 raid0's (concatenations) 
> of 3 disks each.  Then I want to raid1 (mirror) the raid0's.   This 
> leaves 1 disk for the OS.

That is a suboptimal allocation and will actually increase the
likelihood of failure. What you want to do is to have 3 raid1's of 2
disks each and to concatenate these 3 via raid0 or LVM.

And why are you not placing the OS itself on a RAID too? If the system
goes down, so will your application.

> with the afore mentioned configuration. First the mirror is broken and 
> half of the mirror is mounted as another filesystem while the 
> application continues to run on the other half of the mirror.  The 
> backup is performed and then the mirror is resync'ed.  However, I want 
> to move to x86 and linux and need to know if the same is possible and 
> how to do it.  Does anyone have any experience / advise?

You should concat the 3 raid1's via LVM and use LVMs snapshot facility.
(Google for the howto)


Mit freundlichen Grüßen,
    Lars Marowsky-Brée <lmb@suse.de>

-- 
High Availability & Clustering		ever tried. ever failed. no matter.
SuSE Labs				try again. fail again. fail better.
Research & Development, SUSE LINUX AG		-- Samuel Beckett

-
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

  reply	other threads:[~2003-10-09  9:55 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-10-08 20:53 raid0 + raid1 question anthony mayes
2003-10-09  9:55 ` Lars Marowsky-Bree [this message]
2003-10-09 19:54 ` Rechenberg, Andrew
2003-10-09 21:00   ` anthony mayes
2003-10-10  2:37     ` Kevin P. Fleming

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20031009095500.GA20643@marowsky-bree.de \
    --to=lmb@suse.de \
    --cc=anmayes@siue.edu \
    --cc=linux-raid@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.