mkfs.ext2 in cygwin not working

I'm attempting to create a fs within a file.

under linux it's very simple:

create a blank file size 8 gb

dd of=fsFile bs=1 count=0 seek=8G

"format" the drive:

mkfs.ext2 fsFile works great.

however under cygwin running from /usr/sbin ./mkfs.ext2 has all kinds of weird errors (i assume because of some abstraction)

But with cygwin i get:

mkfs.ext2: Device size reported to be zero. Invalid partition specified, or partition table wasn't reread after running fdisk, due to a modified partition being busy and in开发者_JAVA技巧 use. You may need to reboot to re-read your partition table.

or even worse (if i try to access a file through /cygdrive/...

mkfs.ext2: Bad file descriptor while trying to determine filesystem size

:( please help, Thanks

Well it seems that the way to solve it is to not use any path on the file you wish to modify. doing that seems to have solved it.

also it seems that my 8 gig file does have a file size that's simply to big, it seems like it resets the size var i.e.

$ /usr/sbin/fsck.ext2 -f testFile8GiG
e2fsck 1.41.12 (17-May-2010)
The filesystem size (according to the superblock) is 2097152 blocks
The physical size of the device is 0 blocks
Either the superblock or the partition table is likely to be corrupt!
Abort? no
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
testFile8GiG: 122/524288 files (61.5% non-contiguous), 253313/2097152 blocks

Thanks anyway