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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

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btrfs appreciation post (lemm.ee)

submitted 1 year ago by geoff@lemm.ee to c/linux@lemmy.ml

21 comments fedilink hide all child comments

cross-posted from: https://lemm.ee/post/4274796

Just wanted to share some love for this filesystem.

I’ve been running a btrfs raid1 continuously for over ten years, on a motley assortment of near-garbage hard drives of all different shapes and sizes. None of the original drives are still in it, and that server is now on its fourth motherboard. The data has survived it all!

It’s grown to 6 drives now, and most recently survived the runtime failure of a SATA controller card that four of them were attached to. After replacing it, I was stunned to discover that the volume was uncorrupted and didn’t even require repair.

So knock on wood — I’m not trying to tempt fate here. I just want to say thank you to all the devs for their hard work, and add some positive feedback to the heap since btrfs gets way more than it’s fair share of flak, which I personally find to be undeserved. Cheers!

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[–] exu@feditown.com 34 points 1 year ago (1 children)

Agreed, RAID 1 (and 10) are pretty stable.

Moderately fun fact, RAID 1 in BTRFS is not really RAID 1 in the traditional sense. Rather it's a guarantee that your data lives on two separate drives. You don't know which ones though. You could have one copy of everything on a 12TB drive, whith various secondary copies distrivlbuted on three 4TB drives.
Traditional RAID 1 works ONLY with two drives, with a capacity of the smaller drive as upper limit. The way to extend a traditional RAID 1 array is by adding two new drives and creating a RAID 10 with all four. (Multiple RAID 1 striped)

[–] geoff@lemm.ee 12 points 1 year ago

This right here is what has made it so flexible for me to reuse salvaged equipment. You can just chuck a bunch of randomly sized drives at it, and it will give you as much storage as it can while guaranteeing you can lose any one drive. Fantastic.