linux-kernel - Re: Raid 10 Problems?

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <Pine.LNX.4.64.0703071010260.8538@twinlark.arctic.org>
Date:	Wed, 7 Mar 2007 10:20:12 -0800 (PST)
From:	dean gaudet <dean@...tic.org>
To:	Marc Perkel <mperkel@...oo.com>
cc:	Jan Engelhardt <jengelh@...ux01.gwdg.de>,
	linux-kernel@...r.kernel.org
Subject: Re: Raid 10 Problems?

On Mon, 5 Mar 2007, Marc Perkel wrote:

> 
> --- Jan Engelhardt <jengelh@...ux01.gwdg.de> wrote:
> 
> > 
> > On Mar 4 2007 19:37, Marc Perkel wrote:
> > >> 
> > >>   -b internal -- seems like a good idea to speed
> > up
> > >>   resynchronization.
> > >
> > >I'm trying to figure out what the default is. 
> > 
> > -b none, meaning the whole drive will be
> > resynchronized when the
> > even counters don't match.
> > 
> >
> http://gentoo-wiki.com/HOWTO_Install_on_Software_RAID#Write-intent_bitmap
> > 
> > 
> 
> That information has been extremely useful. Thanks a
> lot. I fund a command to do the bitmap internal after
> the array was made so I added that. Seems like some of
> these features should be default. Maybe it's time for
> the raid folks to update what is default?

the bitmap has performance implications... for example:

http://www.mail-archive.com/linux-raid@vger.kernel.org/msg07229.html

i still prefer to use the bitmap -- i just make it external for devices 
which are busy.

note that unless you tweak your init scripts you'll need to put external 
bitmaps on your root partition, see this thread:

http://www.mail-archive.com/linux-raid@vger.kernel.org/msg06441.html

-dean
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/