Hello. 

First, the computer. Its an AMD Phenom II X4, Gigabyte motherboard (GA-MA790FXT-UD5P) with SB750 southbridge, 4 GB ram, ATI 5850 vga. I have BIOS RAID 0 in my computer (done with the sb750 southbridge) with 2 Samsung Spinpoint 500 GB each. 3 partitions made in that RAID, 100MB for windows 7 boot, 292 and 638 GB.

Once i loaded gparted, it recognized the partitions correctly, but with an exclamation mark warning, which i think means that i cannot do anything to them and something is wrong. The controller has a name like AMD 2+0 Striped or something like that in windows environment. the name of the raid drive in gparted is /dev/mapper/pdc_hffgdfec. when i right click on any of those partions and select Information, it shows: the device  /dev/mapper/pdc_hffgdfec doesn't exist. ntfsresize error(2). failed to check  /dev/mapper/pdc_hffgdfec1 mount state: no such file or directory. probably /etc/mtab is missing. unable to read contents....ntfsprogs required.I downloaded the ISO straight from sourceforge and have not modified it in any way.A single wd 500 i have on the sb750 works fine, i tried a checkdisk and it works.

I discussed the matter with  *gedakc* in the forums, and he recommended I should submit the bug here.He also suggested I post the results from ls -l /dev/mapper/

They are as follows:
v.0.5.2-11

total 0
crw-rw---- 1 root root   10, 59 2010-06-18 20:56 control
brw-rw---- 1 root root 254,  0 2010-06-18 20:56 pdc_hffgdfec
brw-rw---- 1 root root 254,  1 2010-06-18 20:56 pdc_hffgdfec1
brw-rw---- 1 root root 254,  2 2010-06-18 20:57 pdc_hffgdfec2
brw-rw---- 1 root root 254,  3 2010-06-18 20:57 pdc_hffgdfec3


v.0.6.0-1

total 0
crw------- 1 root root 10, 59 2010-06-19 13:17 control
lrwxrwxrwx 1 root root       7 2010-06-19 13:17 pdc_hffgdfec -> ../dm-0
lrwxrwxrwx 1 root root       7 2010-06-19 13:17 pdc_hffgdfec1 -> ../dm-1
lrwxrwxrwx 1 root root       7 2010-06-19 13:17 pdc_hffgdfec2 -> ../dm-2
lrwxrwxrwx 1 root root       7 2010-06-19 13:17 pdc_hffgdfec3 -> ../dm-3

where the number 254 used to be, now there is a complete blank there.i don't know if this helps.


This is the gparted_details.htm after performing checkdisk on partition pdc_hffgdfec3:




GParted 0.6.0

Libparted 2.2
Check and repair file system (ntfs) on /dev/mapper/pdc_hffgdfecp3  00:00:00    ( ERROR )
     	
calibrate /dev/mapper/pdc_hffgdfecp3  00:00:00    ( SUCCESS )
     	
path: /dev/mapper/pdc_hffgdfecp3
start: 614400000
end: 1953279999
size: 1338880000 (638.43 GiB)
check file system on /dev/mapper/pdc_hffgdfecp3 for errors and (if possible) fix them  00:00:00    ( ERROR )
     	
ntfsresize -P -i -f -v /dev/mapper/pdc_hffgdfecp3
     	
ntfsresize v2.0.0 (libntfs 10:0:0)
ERROR(2): Failed to check '/dev/mapper/pdc_hffgdfecp3' mount state: No such file or directory
Probably /etc/mtab is missing. It's too risky to continue. You might try
an another Linux distro.


And the screenshot showing the problem in gparted in the attachment.