_require_command "$BTRFS_CONVERT_PROG" btrfs-convert
_require_command "$MKFS_EXT4_PROG" mkfs.ext4
_require_command "$E2FSCK_PROG" e2fsck
+# ext4 does not support zoned block device
+_require_non_zoned_device "${SCRATCH_DEV}"
_require_fs_space $SCRATCH_MNT $(du -s /lib/modules/`uname -r` | ${AWK_PROG} '{print $1}')