Can't write into a file... 'no space available'

[real]

Hi all,

I'm new to this group and somewhat new to lynxos also. I'm working on
PowerPC Card. That has 1 GB of RAM and the LynxOS image is flashed
into the EEPROM.

at a particular stage if I try to create a file then its possible. But
if i want to write something into it then its not as it says that
there is no space available on the device.

The result from df is:

/dev/rd0 512 19960 19960 0 100%

With my little knowledge i expect the number of blocks to be a lot
more than 19960. I'm really stuck due to it. Need a quick and expert
suggestion.

Thanks in advance