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According to the mdadm output, there's no need to resync. You've got a RAID 5 array with 15TB of usable space, made out of 3TB drives. Such an array needs six drives for normal operation: 5 data drives and 1 parity drive. The mdadm output doesn't show any of the drives as failed, so when you add a seventh drive to the array, mdadm configures it as a hot ...


You can use mdadm or cat /proc/mdstat.


I would first of all urge you to clean up the question quite a bit. Some things you need to explicitly state :- a. You haven't shared what kind of raid setup you are having, is this software RAID or a hardware RAID ? b. You have talked about both ubuntu and Debian in the same breath and question. Could you be explicit in what you want to have ? c. From ...


I decided to take the road of btrfs instead of zfs for my "NAS". I tested both before, and I have to admit that I found ZFS much better documented, I was really seduced by its command line interface, so for me ZFS was the "better" choice. But there was a show-stopper: if you have 3x 2TB HDD for ZFS in RAID-5 and you want to grow them to 4x TB HDD, that is ...


yes I could! I have used the following way to access the data. $ mdadm -f -R /dev/md0 mdadm --examine --scan This started the RAID10 (which indeed is somewhat of a oddity to myself, especially how I ended up, and what makes it different to a simple RAID1) Anyway the Linux MD RAID10 was presented like this for 2 disks 2 drives 3 drives ...


Well, I think you can't, the data were striped and mirrored at the same time. See the Diagram. EDIT: With 2 drives, it is a surprise how you came to RAID10. Diagram


RAID controllers present a virtual disk to the system that looks like a single disk to the operating system but is actually the array made up of multiple disks. Unless there is special support for managing the RAID controller in the operating system, the OS cannot see or check the component disks. You will have to verify the RAID array using features ...


You are trying to install grub in the wrong place. Try to install it in the Ubuntu partition.

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