Version 1.62: 


 * Revision 1.62  1995/08/02  20:03:46  ephraim
 * Modified spin-up procedure in usable_disk, invoked from swr_set_config.
 *
 * Revision 1.61  1995/07/12  15:08:00  ephraim
 * Corrected bug in swr_op which could lead to hung processes when
 * writing multiple chunks in a single operation.
 *
 * Revision 1.60  1995/07/05  16:13:46  ephraim
 * Improved performance for synchronous lists.
 * Operations using nearby buffers are grouped into a single physio call.
