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I hope you also realised that the old contents will be wiped in the process, so you might want to create a new array with one device missing (use mdadm --level=10 --raid-devices=8 --missing …

sudo mdadm --detail /dev/md0 State : clean, degraded Number Major Minor RaidDevice State 0 0 0 0 removed 1 8 32 1 active sync /dev/sdc 3 8 48 2 active sync /dev/sdd 0 8 16 - faulty spare …

Well, mdadm --stop /dev/md0 might take care of your busy messages, I think that's why its complaining. Then you can try your assemble line again. If it doesn't work, --stop again …

2017年4月13日 · It was suggested to me that the old superblocks of the raid arrays might be left behind causing MD to think it is a real array and thus binding the disks. The suggested …

$ mdadm --detail /dev/md1 mdadm: metadata format 00.90 unknown, ignored. mdadm: metadata format 00.90 unknown, ignored. /dev/md1: Version : 00.90 Creation Time : Thu May 20 …

2019年4月29日 · LVM and mdadm / dmraid are both offering software RAID functionality on Linux. This is pretty much a follow-up post to this question from 2014. Back then, @derobert …

Synology has a customized version the md driver and mdadm toolsets that adds a 'DriveError' flag to the rdev->flags structure in the kernel. Net effect - if you are unfortunate enough to get a array

2014年10月26日 · Tested expanding a raid-10 on a ubuntu 16.04 VM. Setting up 4-disk raid-10. cladmin@ubuntu:~$ lsblk -o NAME,SIZE,FSTYPE,TYPE,MOUNTPOINT NAME SIZE …

Personally I always go MD+LVM. It is faster (MD can do parallel reads in RAID1) and it requires only 2 disks (if you do not want to rebuild the mirror after every reboot) and MD is designed …