raw devices larger that 2g on redhat AS 3.0

Hello Gurus! 
I have a predicament over here.

We are running red hat AS 3.0 with kernel 2.4.21-20.ELsmp in a HP Proliant G3, we install sybase-12.5.3 and we have some raw devices 
assigned as:  

/dev/raw/raw1   /dev/cciss/c0d0p8
/dev/raw/raw2   /dev/cciss/c0d0p10
/dev/raw/raw3   /dev/cciss/c0d0p7
/dev/raw/raw4   /dev/cciss/c0d0p9
/dev/raw/raw5   /dev/cciss/c0d0p15
/dev/raw/raw6   /dev/cciss/c0d0p14
/dev/raw/raw7   /dev/cciss/c0d0p12
/dev/raw/raw8   /dev/cciss/c0d0p11
/dev/raw/raw9   /dev/cciss/c0d0p13
/dev/raw/raw10  /dev/cciss/c0d0p3

the devices are already owned by sybase:sybase and the devctl device also.

some of them are larger that 2gb (4g) and when whe try to use assign it to a sybase device,  it sends error to tried to asigned it.

I suspect it has to be a limitation of a 32 bit operating system, is there a work around of this (The filesystem approach is the last solution), thanks! 
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