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Re: cannot boot with BTRFS in degraded mode
From: |
Giovanni Biscuolo |
Subject: |
Re: cannot boot with BTRFS in degraded mode |
Date: |
Fri, 06 Sep 2019 11:47:09 +0200 |
Hello Maxim,
Maxim Cournoyer <address@hidden> writes:
[...]
> Fixing the Grub config (manually or not) is one thing, but not enough,
> as it is the init script (contained within the initrd)
Yes I was obviously wrong: the initrd must be updated, also!
> run by the kernel
> that mounts the root partition. This script currently doesn't honor the
> rootflags= argument given to the Linux kernel command line, which means
> that you cannot pass extra options (such as 'degraded') to mount your
> root partition during the early boot process of the system.
Yes, now I understand, thanks!
>> Anyway, with the help of a friend, in a few hours we are going to test
>> this solution :-)
>
> Good luck!
The only viable solution to this problem is to boot a rescue system and
fix the BTRFS array there: I'm doing it now via grml (remotely via ssh
with the help of a friend who "manually" started the network and ssh
daemon)
For the records, this is what I did:
1. btrfs replace start 5 /dev/sde /target (since the missimg one was the
5th)
2. btrfs replace status /target
it took less then 10 mins to replace a 1TB disk with 76.28GiB used:
--8<---------------cut here---------------start------------->8---
Started on 6.Sep 09:21:44, finished on 6.Sep 09:40:45, 0 write errs, 0
uncorr. read errs
--8<---------------cut here---------------end--------------->8---
[...]
Thank you again for your support! Gio'
--
Giovanni Biscuolo
Xelera IT Infrastructures
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