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renkinjutsu
n00b
Joined: 28 Jul 2010
Posts: 28
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 Posted: Wed Feb 08, 2012 8:59 pm Post subject: |
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| kingfame_147 wrote: | Sure you can mount any multi device btrfs if you tell the mount cmd all devices belonging to the filesystem. Something like
| Code: | | mount -o device=/dev/sdb,device=/dev/sdc,device=/dev/sdd,device=/dev/sde /dev/sdb /mnt |
This works at any time when you have the mount command available. E.g. you can put that into your grub rootflags like
| Code: | | rootflags=subvol=@root,device=/dev/sdb,device=/dev/sdc,device=/dev/sdd,device=/dev/sde |
No bug at all, like I said before  Ofc this isn't as handy as just mount /dev/sdb, but then you need the "btrfs device scan". |
It's mentioned that it could be mounted using Labels or UUID as well. Would the -o device=... still be necessary in this case? |
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kingfame_147
Apprentice
Joined: 11 Oct 2008
Posts: 171
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| Posted: Thu Feb 09, 2012 9:16 am Post subject: |
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| The uuid or label just uses the links at /dev/disk/by-uuid or /dev/disk/by-label. Therefore it still only points to a single device, that won't help. I don't know to which device of the multi device btrfs it points, but it's only one. |
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jenkler
Apprentice
Joined: 28 Apr 2003
Posts: 222
Location: Sweden - Stockholm
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| Posted: Fri Mar 16, 2012 9:58 am Post subject: Dont work |
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| kingfame_147 wrote: | Sure you can mount any multi device btrfs if you tell the mount cmd all devices belonging to the filesystem. Something like
| Code: | | mount -o device=/dev/sdb,device=/dev/sdc,device=/dev/sdd,device=/dev/sde /dev/sdb /mnt |
This works at any time when you have the mount command available. E.g. you can put that into your grub rootflags like
| Code: | | rootflags=subvol=@root,device=/dev/sdb,device=/dev/sdc,device=/dev/sdd,device=/dev/sde |
No bug at all, like I said before Ofc this isn't as handy as just mount /dev/sdb, but then you need the "btrfs device scan". |
I can't this to work, do i need the @root and what is that ??
Here is som screenshoots of my issue
https://forums.gentoo.org/viewtopic-t-910686-highlight-btrfs.html
_________________
Hello from me: Jenkler IT AB (swedish) (use google translate). Check out my Linux manpages for web in english. |
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kingfame_147
Apprentice
Joined: 11 Oct 2008
Posts: 171
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| Posted: Fri Mar 16, 2012 10:22 am Post subject: |
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The @root is just the name of a subvolume. What you normally do with btrfs:
Create a filesystem and then add subvolumes like @root, @etc, @var... Then you mount @root to /, @etc to /etc, @var to /var... Then you can snapshot and rollback the single subvolumes independently |
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spartak
n00b
Joined: 29 Jan 2003
Posts: 22
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| Posted: Tue Apr 02, 2013 12:13 am Post subject: |
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| adding rootdelay=10 solved the issue with trying to boot an raid1 btrfs root partition |
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