Hi Rudy, thanks for the answer, but as mentioned at the end, "--force" assemby does not work. Reason is, 7 disks complains 3 are missing and the 3 missing are assembed, since their superblock does not report errors. Of course, 3 disks are not enough to assembly the array, forced or not. bye, pg On Sat, May 04, 2013 at 04:22:39PM +0000, Rudy Zijlstra wrote: > Hi > > I would start with mdadm assemble --force > > Do not use create unless all else has failed > > Cheers > > Rudy > --- > Verstuurd met mijn BlackBerry van Vodafone > > -----Original Message----- > From: Piergiorgio Sartor <piergiorgio.sartor@xxxxxxxx> > Sender: linux-raid-owner@xxxxxxxxxxxxxxx > Date: Sat, 4 May 2013 18:08:04 > To: <linux-raid@xxxxxxxxxxxxxxx> > Subject: RAID-6 with 3 missing disks > > Hi all, > > I know this was probably already discussed, but > maybe I need some refresh. > > I've a 10 HDDs RAID-6 which, due to mishap (disks > were disconnected accidentaly), has now 3 missing > devices and cannot be assembled. > The data should be OK, since no writes were occurring > during the accident, so putting them together again > should work. > > As far as I know, one option is to create, with > "mdadm -C" the array again, giving the disks in > the proper order. > > Since all HDDs are readable, I guess "mdadm -E" > should return the role of each device. > Is this correct for the creation order? > > Second question is about the "Data Offset", since > this array was created with an older version of > "mdadm" and the data offset is very close to the > superblock. > As far as I know, new mdadm creates the data a > bit far aways. > Is there any way to specifiy the proper offset? > > Finally, is there an alternative to "mdadm -C" > or it is the only option? > Forcing assembly does not work, but maybe there > is another way to tell mdadm to really assemby > the array, taking into account the superblock > information, which are all readable. > > Thanks a lot in advance, > > bye, > > -- > > piergiorgio > -- > To unsubscribe from this list: send the line "unsubscribe linux-raid" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- piergiorgio -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
