Hi,
I wanted to test btrfs on the eMMC of beaglebone black based custom board.
Precondition: eMMC is formatted with ext4 filesystem
Use case:
Format eMMC with mkfs.btrfs -L <label> <dev>
Result:
Mkfs.btrfs denies formatting eMMC because its existing filesystem
# mkfs.btrfs -L "1storage" /dev/mmcblk0p2
/dev/mmcblk0p2 appears to contain an existing filesystem (ext4).
Error: Use the -f option to force overwrite.
If I add "-f" its possible to format the eMMC.
# mkfs.btrfs -f -L "1storage" /dev/mmcblk0p2
Detected a SSD, turning off metadata duplication. Mkfs with -m dup if you want
to force metadata duplication.
Btrfs v3.17
See http://btrfs.wiki.kernel.org for more information.
Performing full device TRIM (1.72GiB) ...
Turning ON incompat feature 'extref': increased hardlink limit per file to 65536
[273917.692896] btrfs: device label 1storage devid 1 transid 3 /dev/mmcblk0p2
fs created label 1storage on /dev/mmcblk0p2
nodesize 16384 leafsize 16384 sectorsize 4096 size 1.72GiB
I had downloaded debian package from following link
https://packages.debian.org/sid/armhf/btrfs-tools/download
Is it a bug ? or I am missing something ?
Thank you,
Regards,
Ankur
L&T Technology Services Ltd
www.LntTechservices.com<http://www.lnttechservices.com/>
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