Messages in this thread | | | Date | Wed, 7 Mar 2007 10:20:12 -0800 (PST) | From | dean gaudet <> | Subject | Re: Raid 10 Problems? |
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On Mon, 5 Mar 2007, Marc Perkel wrote:
> > --- Jan Engelhardt <jengelh@linux01.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
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