On Sat, 27 Oct 2012 17:26:42 +0200 Sam van Ratt <sam.vanratt@xxxxxxx> wrote: > Hello > a few days I received a NAS with 8 Slots. The original config consistet > of 8* 2TB HDs as a RAID6 mdadm softraid system. After a normal reboot > the array was no longer found, so QNAP was contacted. > The support told the keyuser todo this: > > > mdadm -D /dev/md0 (zeigt das gesamte RAID auf) > to assemble the HDs you have to: > mdadm -A /dev/md0 /dev/sda3.... (take care here, depending on the HDs > they get a value like /dev/sdb3 dev/sdc3 ...) - with 8 HDs: > mdadm -A /dev/md0 /dev/sda3 /sdb3 /dev/sdc3 /dev/sdd3 /dev/sde3 > /dev/sdf3 /dev/sdg3 /dev/sdh3 (be careful with the order!) > If you get an error message about the assemble, you have to stop md0 > mdadm -S /dev/md0 (stopping md0) > umount /dev/md0 (unmount of md0) > > After serveral failed tries it endet in have a RAID 1 Konfig on sda and > sdb but not seeing anything else of the config before (funnily only a > 500MB partition (as /dev/md9 sounds as a lot of tries). > As I'm not using mdadm in my workplace anywhere: > > How can I delete the RAID1 (pretty simple I know) and reconstruct the R6 > Array without damaging the config further (and therefore the datas). The > R6 should be about 11TiB usable size. > Is there a init build with searching for the old conifg? As R6 it should > even be readable without sda or sdb if this should be needed. I manly > use HW RAID Controller where a few (ICP, Infortrend, Areca) which > allows a reassembly by just declaring the disks as member to mdx and > assemble then again; I hope mdadm could offer something similar > The advice you were given doesn't seem very helpful. Please run mdadm --examine /dev/sd* collect the output, and post it. NeilBrown
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