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        In the table below, a denotes a synchronous random-access write
        device object, o denotes an offset of type boost::uint64_t,
        cb denotes an object satisfying constant
        buffer sequence requirements, and ec denotes an object
        of type error_code.
      
Table 31. Buffer-oriented synchronous random-access write device requirements
| operation | type | semantics, pre/post-conditions | 
|---|---|---|
| 
                   | 
                   | Equivalent to: error_code ec; size_t s = a.write_some(o, cb, ec); if (ec) throw system_error(ec); return s; 
 | 
| 
                   | 
                   | 
                  Writes one or more bytes of data to the device  |