From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Tomas France" Subject: Re: Is it possible to grow a RAID-10 array with mdadm? Date: Mon, 30 Jul 2007 12:24:03 +0200 Message-ID: <0e3e01c7d293$d85086d0$332317ac@Cortex> References: <46ABAC5A.2000103@ziu.info><46ABB830.1000204@ziu.info><0dc901c7d20b$be23d100$332317ac@Cortex> <18093.42484.733479.935581@notabene.brown> Mime-Version: 1.0 Content-Type: text/plain; format=flowed; charset="ISO-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit Return-path: Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids Thanks for the answer Neil! >> The man page for mdadm does not mention it because it is not supported. >> << It doesn't actually even mention the possibility to create a RAID-10 array (without creating RAID-0 on top of RAID-1 pairs), yet from the info I found, a lot of people have been using it for quite a while. Almost as if it was a complete secret ;) As for the RAID-10 growing / layout change - I'd absolutely love to see that implemented in the (hopefully near) future. IMHO, RAID-10 is becoming very popular because of the falling hard drive prices. Tomas ----- Original Message ----- From: "Neil Brown" To: "Tomas France" Cc: Sent: Monday, July 30, 2007 10:48 AM Subject: Re: Is it possible to grow a RAID-10 array with mdadm? > On Sunday July 29, tomfra@centrum.cz wrote: >> Hi everyone, >> >> Is it possible to add drives to an active RAID-10 array, using the "grow" >> switch with mdadm, just like it is possible with a RAID-5 array? Or >> perhaps >> there is another way? >> >> I have been looking for this information for a long time but have been >> unable to find it anywhere. The man page for mdadm does not mention >> RAID-10 >> at all so that didn't help either. Has anyone tried it? > > The man page for mdadm does not mention it because it is not > supported. > > There are several reshape options that I would like to implement > including > - raid5 -> raid6 > - shrinking raid4/5/6 > - raid0 -> raid5 > - changing chunksize/layout of raid4/5/6 > - raid10 growing and layout change > > unfortunately I haven't yet found/made the time. > > Patches are always welcome :-) > > NeilBrown > - > 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 > >