this post was submitted on 03 Nov 2024
30 points (78.8% liked)

Selfhosted

40246 readers
752 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
 

I know how RAID work and prevent data lost from disks failures. I want to know is possible way/how easy to recover data from unfunctioned remaining RAID disks due to RAID controller failure or whole system failure. Can I even simply attach one of the RAID 1 disk to the desktop system and read as simple as USB disk? I know getting data from the other RAID types won't be that simple but is there a way without building the whole RAID system again. Thanks.

you are viewing a single comment's thread
view the rest of the comments
[–] [email protected] 24 points 2 weeks ago (5 children)

I'd stay away from hardware RAID controllers. If they fail you're gonna have a hard time. Learned that the hard way. With a software RAID you can do what you proposed. Just put the disk in another system and use it there.

[–] [email protected] 2 points 2 weeks ago (2 children)

I'm going to give you the benefit of the doubt and assume what you said was simply confusing, but not wrong.

So just to be clear if your raid array fails, and you're using software raid, you can plug all of the disks into a new machine and use it there. But you can't just take a single disk out of a raid 5 array, for example, and plug it in and use it as a normal USB hard drive that just had some of the files on it, or something. Even if you built the array using soft-raid.

[–] [email protected] 11 points 2 weeks ago

No, they mean that if the controller fails, you have to get a compatible controller, not just any controller. And that usually means getting another of the exact same controller. Hopefully they're still available to buy somewhere. And hopefully it's got a matching firmware version.

But if you're using mdraid? Yeah just slap those drives on any disk controller and bring it up in the OS, no problem.

load more comments (1 replies)
load more comments (3 replies)