> Hi, 
> 
> Thanks for your immediate response.
> In the link provided by you , it is mentioned as :
> 
> For QNX6 FS
> -----------------
> Physical disk sector
>     32-bit (2 TB), using the devb API. 
> 
> Does it mean that the max size of disk / USB is limited to 2TB ? 
> 
> For QNX4 FS
> -----------------
> Disk size
>     2^64 bytes; limited by the disk driver. 
> 
> Does it mean that the max size supported by qnx4 fs is 2^64 bytes.
> If so, what is the meaning of "limited by disk driver" ? How to know about the
>  max size supported by the driver ?
> 
> Thanks
> 
> Jagat
> 
>