Hi!
> So I do not understand why it does not work correctly for
> him to mount either device. Maybe this problem is not
> what I see in my testing (using 32) with disk partitions
> instead of loop.
>
> With partitions, I only see the mount problem on raid0,
> not on raid1.
Without having looked at the code:
It seems as if this is a problem in mkfs. The first time, I mount the fresh
image I have to search the correct device. After having mounted it at least
once, I can use both devices interchangeably:
$ dd if=/dev/zero of=raid1_0.img bs=1M count=500
$ dd if=/dev/zero of=raid1_1.img bs=1M count=500
$ mkfs.btrfs -m raid1 -d raid1 raid1_0.img raid1_1.img
$ losetup /dev/loop0 raid1_0.img
$ losetup /dev/loop1 raid1_1.img
$ mount -t btrfs /dev/loop0 /mnt/btrfs
mount: wrong fs type, bad option, bad superblock on /dev/loop0,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so
$ mount -t btrfs /dev/loop1 /mnt/btrfs
#OK
$ umount /mnt/btrfs
$ mount -t btrfs -o ro /dev/loop0 /mnt/btrfs
#OK
$ umount /mnt/btrfs
$ mount -t btrfs -o ro /dev/loop1 /mnt/btrfs
#OK
So my guess is, that there's something wrong with mkfs.
Cheers,
Andi
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