[CentOS] error Centos4 image

Hello all!

Actually I use dual boot PC with CentOS4 (kernel 2.6.9-11) and WinXP
(HDD 20GB, 512MB, PentiumIII 800MHz), but I have the following problem
doing the image with g4u

----BEGIN ERROR MESSAGGE----
wd0: (uncorrectable data error) 
8951MB  1.59MB/s wd0d: error reading fsbn 18333440 of 18333440 -
18333567 (wd0 bn 18333440; cn 18187 tn 14 sn 62) retrying
wd0: (uncorrectable data error) 
8951MB  1.59MB/s wd0d: error reading fsbn 18333440 of 18333440 -
18333567 (wd0 bn 18333440; cn 18187 tn 15 sn 52) retrying
----END ERROR MESSAGGE----

I review the HDD partition with the g4u command "parts"
g4u>parts wd0

Found NTFS partition; size 20482812 (10001MB), offset 63 skipping
existing NTFS partition at slot e
Found Linux EXT2 partition; size 192780 (94MB), offset 20482875
skipping existing Linux EXT2 partition at slot f
Found swap partition; size 2040255 (996MB), offset 20675655 skipping
existing swap partition at slot g
Found Linux EXT2 partition; size 17157357 18377 (94MB), offset
22715973 skipping existing Linux EXT2 partition at slot i
9 partition 

#       size             offset    fstype      [fsize     bsize       cpg/sgs]
d:   39876480          0        unused       0         0         #(cyl
. 0-39559)
e:   20482812          63        NTFS                            
#(cyl . 0*-20320*)
f:   192780          20482875  Linux Ext2       0         0     #(cyl.
20320*-20511*)
g:   2040255        20675655   swap                              
#(cyl . 20511*-22535*)
i:   17157357       22715973  Linux Ext2       0         0     #(cyl .
22535*-39556*)

I'm not sure about the mean of d partition.

Somebody has made successful images of Centos4 with g4u?, I really
apreciate any ideas.  I posted a similar message to g4u but they
didn't response yet. Thanks in advance, regards


Juan P. Espino