Gene Heskett wrote: > On Friday 12 November 2021 08:49:21 Dan Ritter wrote: > > Ok, zeroed them, nuked mdadm.conf & rebooted. > gparted each one, setting 2 partitions in GPT format on each of 900000 > MIB (sde1) with label MDV1 and 5000 MIB (sde2) labeled MDV2 and applied > that to each of the 4 drives. Double check as /dev/sdf somehow swapped > positions on the drive, fixed that: Wash rinse and repeat for sdf, sdg, > and sdh with labels of MDX1, MDX2, MDY1, MDY2 and MDZ1 and MDZ2. And of > course gparted makes a file system when Apply is clicked. > > but: > root@coyote:~$ > mdadm -C /dev/md0 --level=10 --raid-devices=4 /dev/sde1 /dev/sdf1 /dev/sdg1 > /dev/sdh1 > mdadm: /dev/sde1 appears to contain an ext2fs file system > size=921600000K mtime=Wed Dec 31 19:00:00 1969 > mdadm: /dev/sdf1 appears to contain an ext2fs file system > size=921600000K mtime=Wed Dec 31 19:00:00 1969 > mdadm: /dev/sdg1 appears to contain an ext2fs file system > size=921600000K mtime=Wed Dec 31 19:00:00 1969 > mdadm: /dev/sdh1 appears to contain an ext2fs file system > size=921600000K mtime=Wed Dec 31 19:00:00 1969 > Continue creating array? yes
You should stop there and run wipefs. I note from later mail in this thread that you didn't; and then you had to reboot. With the array not started, or stopped, run wipefs on each of the partitions. Then these -C commands should work well without warnings, and creating a filesystem on the /dev/mdX devices will proceed without warnings or errors. > There are a few unallocated blocks at the ends of all drives. gparted > chose alignment and prespace in MiB. Do I need to add a 3rd partition to > use them up? All drives seem to be identical sizewise but the pages > recommend identical partition sizes. Theoreticly I could expand the > smaller partition to use it up. I would not bother. -dsr-
