SAP ASE (sybase) - Create a Device

-- Create a device - disk init
disk init 
  name="DeviceName", 
  physname="/sybvol01/sap16/data/DeviceName1.dat", 
  size="250M"
GO

For more parameters of disk init:

http://infocenter.sybase.com/help/index.jsp?topic=/com.sybase.infocenter.dc36272.1550/html/commands/X64061.htm