2015-12-14 0:56 GMT+01:00 Phil Turmel <philip@xxxxxxxxxx>: > On 12/13/2015 06:50 PM, Phil Turmel wrote: >> On 12/13/2015 01:18 AM, TheGerwazy . wrote: >>> Hello >>> I have to recreate mdadm raid 6 made with different data offsets. Some >>> drives have 2048 and others 262144. >>> I am looking for mdadm version with data offsets option for each drive. >>> Could somebody help me. Please ? >> >> version 3.3 and above, I believe. If in doubt, just compile the latest >> version yourself -- no root privileges are required to compile it. Then >> run it from the current directory. >> >> git clone git://neil.brown.name/mdadm >> >> make >> [sudo] ./mdadm ...... > > I should add that using --create to reconstruct an array is incredibly > dangerous (to your data) and should only be used as a last resort and > when you are 100% confident you know how to do it. Your question > suggests that might not be true.... in which case sharing your problem > here might be wise. > > Phil Hi Phil Thanks for the message .... but, In the last version of mdadm I get: ./mdadm --create --raid-devices=8 --level=6 --assume-clean /dev/md7 /dev/mapper/ovsdb1:1024 /dev/mapper/ovsdc1:4096 /dev/mapper/ovsdd1:1024 /dev/mapper/ovsde1:1024 /dev/mapper/ovsdf1:1024 /dev/mapper/ovsdg1:1024 /dev/mapper/ovsdh1:1024 /dev/mapper/ovsdi1:4096 mdadm: cannot open /dev/mapper/ovsdb1:1024: No such file or directory but, There is branch data_offset of mdadm 3.2.5: sudo ./mdadm --create --raid-devices=8 --level=6 --assume-clean /dev/md7 /dev/mapper/ovsdb1 /dev/mapper/ovsdc1:4096 /dev/mapper/ovsdd1:1024 /dev/mapper/ovsde1:1024 /dev/mapper/ovsdf1:1024 /dev/mapper/ovsdg1:1024 /dev/mapper/ovsdh1:1024 /dev/mapper/ovsdi1:4096 dadm: Defaulting to version 1.2 metadata mdadm: array /dev/md7 started. so it is exactly what I need :) BTW is it possible to find right data offset without superblock on drive ? Regards, Gerard -- 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
