Partition tables / Output of parted
Hello
I have created multiple filesystems with btrfs, in all cases directly on the devices themself without creating partitions beforehand. Now, if I open the disks containing the multi-device filesystem in parted it outputs the partion table as loop and shows one partition with btrfs which covers the whole disk. Opening the disk with the single-device fileystem in parted shows a partion table, type unknown and no partition on the disk itself.
I am unsure how to interpret this output. Two possible explanations come to mind: a) Btrfs does create partitions, but only if a filesystem spans multiple devices or b) the output of parted is faulty and no actual partition is created in both cases.
Could someone elaborate on this question or just point out where I can find documentation on this issue?
Yours sincerely
Stefan
Quoted 2 lines · On Wed, 4 Jun 2014 13:19:16 Stefan Malte Schumacher wrote:
I have created multiple filesystems with btrfs, in all cases directly on the devices themself without creating partitions beforehand.
I do that sometimes, it works well. I've done the same thing with Ext2/3 in the past as well, it's no big deal.
Quoted 4 lines
Now,
if I open the disks containing the multi-device filesystem in parted it outputs the partion table as loop and shows one partition with btrfs which covers the whole disk.
http://lists.alioth.debian.org/pipermail/parted-devel/2009-May/002840.html
A Google search on "Partition Table: loop" turned up the above explanation as the third result.
Quoted 4 lines
I am unsure how to interpret this output. Two possible explanations come to mind: a) Btrfs does create partitions, but only if a filesystem spans multiple devices or b) the output of parted is faulty and no actual partition is created in both cases.
BTRFS doesn't create partitions.
Signature · 2 lines
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Quoted 17 lines · Russell Coker
Quoted 2 lines · On Wed, 4 Jun 2014 13:19:16 Stefan Malte Schumacher wrote:
I have created multiple filesystems with btrfs, in all cases directly on the devices themself without creating partitions beforehand.
I do that sometimes, it works well. I've done the same thing with Ext2/3 in the past as well, it's no big deal.
Quoted 4 lines
Now,
if I open the disks containing the multi-device filesystem in parted it outputs the partion table as loop and shows one partition with btrfs which covers the whole disk.http://lists.alioth.debian.org/pipermail/parted-devel/2009-May/002840.html
A Google search on "Partition Table: loop" turned up the above explanation as the third result.
Quoted 6 lines
Quoted 4 lines
I am unsure how to interpret this output. Two possible explanations come to mind: a) Btrfs does create partitions, but only if a filesystem spans multiple devices or b) the output of parted is faulty and no actual partition is created in both cases.
BTRFS doesn't create partitions.
c) Parted (libparted) is merely displaying a pretend loop partition table as a way to represent the situation of a file system covering the whole disk in it's view of the world where all disks have a partition table.
Mike