Bcachefs, an Introduction/Exploration

Re:Bcachefs, an Introduction/Exploration by cpuguy83 on Friday July 26, 2024 @08:52AM (#41078209)

Anecdotally and absolutely not production experience here, but I've had a Synology device running btrfs for 7 or 8 years now. Only issue I ever had is when I shipped it cross country with the drives in it, but was able to recover just fine.

This includes plenty of random power losses.

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Re:Bcachefs, an Introduction/Exploration by miedpo on Friday July 26, 2024 @09:41AM (#41078572)

They do use btrfs. However, Synology also uses some additional tools on top of btrfs. From what I remember (could be wrong about the precise details), they actually run mdadm on top of btrfs, and use mdadm in order to get the erasure coding and possibly the cache NVME disk too. (By erasure coding, I mean RAID 5/6, or SHR, which are still unstable generally in BTRFS).

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Re:Bcachefs, an Introduction/Exploration by janc_ on Friday July 26, 2024 @03:58PM (#41081738)

I assume you mean running btrfs on top of md (mdadm) or dm (dmraid), not the other way around?

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Re:Bcachefs, an Introduction/Exploration by miedpo on Friday July 26, 2024 @09:43PM (#41083896)

Woops, you are correct! And it looks like it is dmraid, not mdadm.

https://daltondur.st/syno_btrfs_1/

Sorry about that!

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