I realized raid1 will not serve my purpose (back up data), how to remove raid?

Hey,

Home someone can shed some light on this:

hardware: Dell poweredge T100
omv 3.079 on a 8GB external flash drive (install openmediavault-flashmemory3.4.4)
RAID 1 (two 8TB WD red)
I recently purchase two more 8TB WD easystore USB 3.0 External Hard Drive. I connect one to usb port
I install usb backup plugin, and have backed up 1.5TB data to external hard drive
in advance power management, I set 127-Intermediate power usage with standby, and spindown time 60 min

Q1: I have some spare flash drive, how can I create a backup of external flash drive, in case current one die?

Q2: I understand RAID1 improve redundancy, but doesn't back up data (in case of power surge or fire...), and I am the only person use the NAS, and if I need to take a week to restore data from the backup to NAS I am fine with that. My primary usage is backup data from two windows pc, plex for music, no movie or tv stored in NAS. In that senario, I think I may want to remove raid setup, or there is other raid more suitbale to my case?

Q3: if I want to delete the raid1, I go to storage -> raid management -> remove?
Can I assume the data in both hard drive will not wipe out?

Zitat von cabrio_leo

Q1: There are several possibilities. I use Clonezilla, which is included in omv-extras. Within the OMV WebUI you can trigger that Clonezilla is loaded at next boot.

I would not count on that! Nobody will put his hand in the fire for that.

Hi cabrio_leo,

Thank you for recommending Clonezilla. I play with Clonezilla and it seems within my ability. Once I disassemble RAID 1, I am going to use that.

Thank you again!

Zitat von macom

regarding Q3:

have a look here
and here

The last one proposes this:

Code

mdadm /dev/mdx --fail /dev/disky1
mdadm /dev/mdx --remove /dev/disky1
mdadm --grow /dev/mdx --raid-devices=1 --force


#The result would look something like this:


mdx : active raid1 diskx1[3]
      62519296 blocks super 1.2 [1/1] [U]


#Ta-daa a single disk "RAID1".

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Not sure if this will work fine with OMV and what the drawbacks are.
If you try, it is on your own risk. Feedback is highley appreciated, though

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Hi macom,

Thank you for your advice!
I also come across this article
https://www.suse.com/documenta…ta/raidmdadmdegraded.html
which suggest mdadm --create /dev/md0 -l 1 -n 2 /dev/sda1 missing

I am going to study both option further before pull the trigger.

One more question though, for my use case (primary backup data from two windows pc, and stream mp3 via plex back to windows pc), will raid 5 or raid 10 a better choice? Regardless which raid I use (or no raid at all), I will have a external usb drive.

Thank you again for your suggestion!

HI macom,

Thank you for the link comparing between 5 and 10. I am going to go with 5.

Thanks again