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mkov

Member

Registered: 2015-06-28

Posts: 6

Does btrfs support write-mostly option?

Does btrfs support write-mostly option on raid1? I want to try this file system instead of lvm2+ext4 but I can't find how to setup raid1 of hdd and ssd drive, and set hdd as write-mostly drive.

WorMzy

Administrator

From: Scotland

Registered: 2010-06-16

Posts: 12,514

Website

Re: Does btrfs support write-mostly option?

The write-mostly flag is an mdadm thing, as far as I know the underlying filesystem doesn't matter.

EDIT: I totally misread the question, disregard.

Last edited by WorMzy (2015-06-29 07:02:39)

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Soukyuu

Member

Registered: 2014-04-08

Posts: 854

Re: Does btrfs support write-mostly option?

Looking at btrfs wiki, I read

Btrfs's "RAID" implementation bears only passing resemblance to traditional RAID implementations.

So the answer is probably "no". You could go to #btrfs channel on freenode, devs usually reply fast to any questions.

I sincerely hope you're going to try that with non-crucial data though. First time I tried btrfs, it died on me. Twice. Within the first day.

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