[HD2 Android NAND Development] zap1:
my first init.log after first boot with format_ext4=1 looks like this:

**************************************
*** DesireZ Dandiest v3.3 ***
*** Start the Nand Loading ***
*** freak modifs v4 ***
**************************************
- system mounted
- mmc&mtd scheduler changed
**************************************
*** Format 2nd partition ***
**************************************
Filesystem label=userdata
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
98304 inodes, 393216 blocks
0 blocks (0.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=402653184
12 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912

Writing inode tables: 0/12 1/12 2/12 3/12 4/12 5/12 6/12 7/12 8/12 9/1210/1211/12done
Creating journal (8192 blocks): done
Writing superblocks and filesystem accounting information: done

This filesystem will be automatically checked every 38 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.
tune2fs 1.41.6 (30-May-2009)
-- reformat Partition2 --
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information

11 inodes used (0.01%)
0 non-contiguous files (0.0%)
1 non-contiguous directory (9.1%)
# of inodes with ind/dind/tind blocks: 0/0/0
Extent depth histogram: 1
14948 blocks used (3.80%)
0 bad blocks
1 large file

0 regular files
2 directories
0 character device files
0 block device files
0 fifos
0 links
0 symbolic links (0 fast symbolic links)
0 sockets
--------
2 files
--- EXT4 data loaded --
--- Loaded Nand userdata --
**************************************
*** 3rd partition detected ***
*** 1st boot - create everything ***
**************************************
--- Format 3rd partition --
--- 3rd partition mounted
--- create ext4 file swap
Filesystem label=tmpdata
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
113920 inodes, 113920 blocks
0 blocks (0.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=117440512
4 block groups
32768 blocks per group, 32768 fragments per group
28480 inodes per group
Superblock backups stored on blocks:
32768, 98304

Writing inode tables: 0/41/42/43/4done
Creating journal (4096 blocks): done
Writing superblocks and filesystem accounting information: done

This filesystem will be automatically checked every 23 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.
--- You need to reboot your phone
-- no /cache find, create a default one --
-- Init Nand successfully --
+++ Data-to-SD/EXT4 completed, with the mount status:
rootfs on / type rootfs (rw)
proc on /proc type proc (rw,relatime)
sys on /sys type sysfs (rw,relatime)
/dev/block/mmcblk0p1 on /bootsdcard type vfat (rw,noatime,nodiratime,fmask=0111,dmask=0000,allow_utime=0022,codepage=cp437,iocharset=iso8859-1,shortname=mixed,utf8,errors=remount-ro)
/dev/block/mmcblk0p2 on /data type ext4 (rw,nosuid,nodev,noatime,nodiratime,commit=30,barrier=0,nobh,data=writeback,noauto_da_alloc)
/dev/block/mmcblk0p3 on /mnt/extdata type ext4 (rw,nosuid,nodev,noatime,nodiratime,commit=60,barrier=1,data=ordered,noauto_da_alloc)
+++ All done, let's goooo!!! :D +++

everything's alright?