This is more of a FYI than a request for support...
SLES 11 SP3
EXT3 used for OS, a few other disks used for large volumes, one of the BTRFS I wanted to get rid of and repartition.
Unmounted the BRTFS volume.
Used YAST to delete the BTRFS partition, carving it up into 4 smaller partitions of which 2 of them used for EXT4.
Everything looked fine, BRTFS gone, 2 new EXT4 mounts.
Later rebooted. System boot process stalls during boot indicating a dependent file system could not be mounted. You have entered "Emergency Mode" or some such comes up indicating that after I login I should look at file system journal tools. Login never appear. Same when using the recovery / safe boot option from GRUB. Even trying to boot in single user mode, I get to the point where I can entre root password, but every few characters screen refreshed and I cannot actually login.
After booting into recovery system from DVD, and mounting the EXT3 partition manually, I found in /etc/fstab remnants of BTRFS in it.
First off, the 0 0 makes progress impossible. So its basically a cyanide capsule. Looking an another similar system, the format of the entry is not the same. On removing the line it boots fine.
/dev/disk/by-id/scsi-3600508b10010395659503155375a0100-part1 swap swap defaults 0 0
/dev/disk/by-id/scsi-3600508b10010395659503155375a0100-part2 / ext3 acl,user_xattr 1 1
UUID=ad9dbd38-415a-456e-93d2-f9028f32fb7f /mnt/data1 btrfs defaults 0 0
/dev/disk/by-id/scsi-3600508b10010395659503155375a0300-part1 /mnt/data2 ext4 acl,user_xattr 1 2
/dev/disk/by-id/scsi-3600508b10010395659503155375a0200-part4 /mnt/data1 ext4 acl,user_xattr 1 2
This was via the curses YAST not YAST2 GUI that changes were made.