Changing default root filesystem to ext4
tixy at yxit.co.uk
Wed Aug 17 12:02:00 UTC 2011
On Wed, 2011-08-17 at 13:11 +0200, Arnd Bergmann wrote:
> On Wednesday 17 August 2011, James Tunnicliffe wrote:
> > One thing I noticed during Ubuntu boot on my Panda was that the mount
> > process would say that it detected btrfs was running on a flash card
> > and it had enabled flash mode. I don't know what is different in flash
> > mode and I don't know if when I let Ubuntu auto-mount a flash card for
> > testing on my Laptop if it enabled it. The only mount option I can
> > find that sounds right is "ssd", which isn't on when I just tested it
> > now.
> Good point. Tixy, do you know what mode you were testing btrfs with?
No idea. Do you know a way of finding out what default mount options
are? The only documentation I've found is the man page for 'mount', but
this doesn't mention btrfs at all.
> btrfs understands the 'ssd', 'ssd_spread' and 'nossd' mount options that
> should have a significant impact here, although it's not clear which of
> these is best for a flash memory card, since the characteristics of
> SD cards are very different from SSD.
I'll try those combinations too.
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