On Sat, Feb 02, 2013 at 11:38:38PM +0530, Atri Sharma wrote: > Thanks a ton Hugo. > > It worked like a charm. > > One last thing, how do I create a document in that subvolume?
Same way you'd create a file anywhere else in any other filesystem... :) btrfs is magic and different, but it's not *that* different. Hugo. > I am running some tests for seeing the locking trends when mass > creation and deletion of files take place. > > Thanks, > > Atri > > On Sat, Feb 2, 2013 at 11:32 PM, Hugo Mills <h...@carfax.org.uk> wrote: > > On Sat, Feb 02, 2013 at 11:06:23PM +0530, Atri Sharma wrote: > >> Hi Hugo, > >> > >> Thanks for the earlier help. > >> > >> I needed some more help please. > >> > >> I created a BTRFS partition on /dev/sda3. To verify, the output of df > >> -T command: > >> > >> e > >> /dev/sda1 fuseblk 102396 25180 77216 > >> 25% /run/media/atri/System Reserved > >> /dev/sda3 btrfs 331637760 120 317977536 > >> 1% /run/media/atri/02fad498-f636-410e-a4bf-4d91428b9106 > >> > >> > >> After this, I am trying to create a folder on the partition. How do I do > >> that? > > > > Well, a folder (aka a directory) is created with mkdir. But... > > > >> I tried : > >> > >> [atri@AtriServer ~]$ sudo btrfs subvolume create /dev/sda3/ > >> Create subvolume '/dev/sda3' > >> ERROR: cannot create subvolume - Inappropriate ioctl for device > > > > ... you're trying to create a subvolume here, so I'll assume that's > > what you want. > > > > If you take a look at the output of "btrfs --help", you'll see that > > most of the commands take a path, not a device. This is usually the > > location of some file or directory, and in most cases should be a > > mount point of (some subvolume within) the filesystem. > > > > In this case, what you want to do is create the subvolume with, for > > example: > > > > sudo btrfs subvolume create > > /run/media/atri/02fad498-f636-410e-a4bf-4d91428b9106/subvolumename > > > > because the filesystem is mounted at > > /run/media/atri/02fad498-f636-410e-a4bf-4d91428b9106/, so you need to > > specify a path below that to create any subvolumes in it. (I'd > > recommend mounting your filesystem somewhere with a slightly shorter > > name). > > > > Once you've created the subvolume, it'll look like a directory, but > > it can also be mounted independently of the rest of the filesystem. > > > > Hugo. > > > >> Please help. > >> > >> Atri > >> > >> On Sat, Feb 2, 2013 at 9:56 PM, Atri Sharma <atri.j...@gmail.com> wrote: > >> > Hi Hugo, > >> > > >> > Thanks. > >> > I was having some issues with my priviledges, and sorting them out has > >> > worked. > >> > > >> > Thanks a ton, > >> > > >> > Atri > >> > > >> > On Sat, Feb 2, 2013 at 9:50 PM, Hugo Mills <h...@carfax.org.uk> wrote: > >> >> On Sat, Feb 02, 2013 at 08:56:20PM +0530, Atri Sharma wrote: > >> >>> Hi all, > >> >>> > >> >>> I am running a Fedora 17 system. I am trying to set up a new partition > >> >>> of 2 GB size which has BTRFS as file system. > >> >>> > >> >>> When I am trying to do mkfs.btrfs on a partition, I get: > >> >>> > >> >>> [atri@AtriServer ~]$ mkfs.btrfs /dev/sda3 > >> >>> > >> >>> WARNING! - Btrfs Btrfs v0.19 IS EXPERIMENTAL > >> >>> WARNING! - see http://btrfs.wiki.kernel.org before using > >> >>> > >> >>> check_mounted(): Could not open /dev/sda3 > >> >>> error checking /dev/sda3 mount status > >> >> > >> >> You need to be root, or (typically) to be in the "disk" group in > >> >> order to write to a block device. > >> >> > >> >> Hugo. > >> >> > >> >> -- > >> >> === Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk > >> >> === > >> >> PGP key: 515C238D from wwwkeys.eu.pgp.net or http://www.carfax.org.uk > >> >> --- "What's so bad about being drunk?" "You ask a glass of water" --- > >> >> > >> > > >> > > >> > > >> > -- > >> > Regards, > >> > > >> > Atri > >> > l'apprenant > >> > >> > >> > >> -- > >> Regards, > >> > >> Atri > >> l'apprenant > >> -- > >> To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in > >> the body of a message to majord...@vger.kernel.org > >> More majordomo info at http://vger.kernel.org/majordomo-info.html > > > > -- > > === Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk === > > PGP key: 515C238D from wwwkeys.eu.pgp.net or http://www.carfax.org.uk > > --- We don't just borrow words; on occasion, English has pursued --- > > other languages down alleyways to beat them unconscious > > and rifle their pockets for new vocabulary. > > > > -- > Regards, > > Atri > l'apprenant > -- > To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in > the body of a message to majord...@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- === Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk === PGP key: 515C238D from wwwkeys.eu.pgp.net or http://www.carfax.org.uk --- You're never alone with a rubber duck... ---
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