* Raid root filesystem?
@ 2011-07-09 4:45 Evert Vorster
2011-07-09 8:45 ` Hugo Mills
0 siblings, 1 reply; 3+ messages in thread
From: Evert Vorster @ 2011-07-09 4:45 UTC (permalink / raw)
To: linux-btrfs
Hi there...
A year ago a btrfs raid needs to be scanned before it can be mounted.
Is this still the case?
I would like to have a btrfs raid as root, but so far this was not
possible due to the scanning thing, and thus I still need a /boot
filesystem.
It would be awesome to be able to just boot a btrfs raid without the
need for pesky partitions, as this would allow a system to be "grown"
later when space gets scarce...
--
-Evert-
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Raid root filesystem?
2011-07-09 4:45 Evert Vorster
@ 2011-07-09 8:45 ` Hugo Mills
0 siblings, 0 replies; 3+ messages in thread
From: Hugo Mills @ 2011-07-09 8:45 UTC (permalink / raw)
To: Evert Vorster; +Cc: linux-btrfs
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On Fri, Jul 08, 2011 at 09:45:05PM -0700, Evert Vorster wrote:
> A year ago a btrfs raid needs to be scanned before it can be mounted.
> Is this still the case?
>
> I would like to have a btrfs raid as root, but so far this was not
> possible due to the scanning thing, and thus I still need a /boot
> filesystem.
It's perfectly possible, as far as I know. There's two solutions:
use an initrd that does the scan for you, or specify all of the
devices in the filesystem in the mount command (-o device=...). In
either case, you will need a boot manager that understands btrfs --
grub2 does, and (I think) syslinux.
> It would be awesome to be able to just boot a btrfs raid without the
> need for pesky partitions, as this would allow a system to be "grown"
> later when space gets scarce...
You still need a partition for swap, of course.
Hugo.
--
=== Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk ===
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Raid root filesystem?
@ 2011-07-09 11:05 Tomasz Chmielewski
0 siblings, 0 replies; 3+ messages in thread
From: Tomasz Chmielewski @ 2011-07-09 11:05 UTC (permalink / raw)
To: linux-btrfs, hugo
>> It would be awesome to be able to just boot a btrfs raid without the
>> need for pesky partitions, as this would allow a system to be "grown"
>> later when space gets scarce...
>
> You still need a partition for swap, of course.
With btrfs it's still true, unfortunately, as you can't swap to a file
placed on btrfs.
Are there any middle-term plans to let swap to a file on btrfs (without
the workarounds like loop devices etc.)?
--
Tomasz Chmielewski
http://wpkg.org
^ permalink raw reply [flat|nested] 3+ messages in thread
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2011-07-09 4:45 Evert Vorster
2011-07-09 8:45 ` Hugo Mills
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