this post was submitted on 18 Jun 2024
23 points (89.7% liked)

Selfhosted

40183 readers
475 users here now

A place to share alternatives to popular online services that can be self-hosted without giving up privacy or locking you into a service you don't control.

Rules:

  1. Be civil: we're here to support and learn from one another. Insults won't be tolerated. Flame wars are frowned upon.

  2. No spam posting.

  3. Posts have to be centered around self-hosting. There are other communities for discussing hardware or home computing. If it's not obvious why your post topic revolves around selfhosting, please include details to make it clear.

  4. Don't duplicate the full text of your blog or github here. Just post the link for folks to click.

  5. Submission headline should match the article title (don’t cherry-pick information from the title to fit your agenda).

  6. No trolling.

Resources:

Any issues on the community? Report it using the report flag.

Questions? DM the mods!

founded 1 year ago
MODERATORS
[email protected]
[email protected]
[email protected]
[email protected]
[email protected]
[email protected]
23
Make a raid 5 with two almost full disk and another one empty (lemm.ee)
submitted 5 months ago* (last edited 5 months ago) by [email protected] to c/[email protected]
47 comments fedilink hide all child comments
 

Hello,

I am going to upgrade my server, taking advantage of the fact that I am going to be able to put more hard disks, I wanted to take advantage of this to give a little more security (against loss) to my data.

Currently I have 2 hard drives in ext4 with information, and wanted to buy a third (same capacity all three) and place them in raid5, so that in the future, I can put more hard drives and increase the capacity.

Due to economic issues, right now I can only buy what would be the third disk, so it is impossible for me to back up the data I currently have.

The data itself is not valuable, in case any file gets corrupted, I could download it again, however there are enough teras (20) to make downloading everything a madness.

In principle I thought to put on this server (PC) a dietpi, a trimmed debian and maybe with mdadm make the raid. I have seen tutorials on how to do it (this for example https://ruan.dev/blog/2022/06/29/create-a-raid5-array-with-mdadm-on-linux ).

The question is, is there any way without having to format the hard drives with data?

Thank you and sorry for any mistakes I may make, English is not my mother language.

EDIT:

Thanks for yours answers!! I have several paths to investigate.

you are viewing a single comment's thread
view the rest of the comments
[–] [email protected] 0 points 5 months ago (1 children)

Wut...

I think you're missing the point of RAID here, possibly. Where's the reliability in this?

[–] [email protected] 3 points 5 months ago (1 children)

Not to speak for the person above you. But I believe they are saying they have 1 computer with a raid5 array, that backs up to two different local servers, and then at least 1 of those 3 servers backs up to a cloud provider.

If that is true then they are doing it correctly. It is highly recommended to follow a 3-2-1 storage solution, where you back up to a local backup and a cloud backup for redundancy.

[–] [email protected] 2 points 5 months ago (1 children)

Ahhh, makes sense. That kind of wrecked my brain for a moment.

[–] [email protected] 2 points 5 months ago

Lol, sorry, I really tried to make it clear what I was doing, honest, I did! 😄

Yes, I have 3 local devices that replicate to each other, one is RAID5, (well, 2 are, but...not for long). And one of them also does backup to a cloud storage.

Not ideal, because 3 devices are colocated, but it's what I can do right now. I'm working on a backup solution to include friends and family locations (looking to replicate what Crashplan used to provide in their "backup to friends" solution).