 
                            TECHNICAL BULLETIN 
                             Bulletin 1-254 
Date:  October 17, 1989 
 
     Operating System Updates Found in NetWare Version 2.15, Revision C 
 
     This bulletin explains some limitations experienced by users of NetWare  
     v2.15,  revision A.  If you have experienced any of the following  
     limitations, call  1 (800) UPDATE1.  Be prepared to provide full details  
     of your system. 
  
     Operating System and External Bridge Routing Limitation 
 
     The NetWare v2.15 operating system and external bridges have a router  
     limitation.  If eight or more file servers exist on an internetwork,  
     every eighth server in the router table could be lost.  If users attempt  
     to log in to a fully functional file server, but some users receive the  
     message "Unknown  fileserver," you may have this limitation. 
 
     Disk Mirroring Limitations 
 
     1)    "ABEND: Invalid Redirection Index Table" 
 
           You may have received the error above after using the REMIRROR  
           command on a disk drive larger than 255MB.  This has been  
           solved--you will only receive this error message when something  
           has actually happened to the Redirection Index table. 
 
     2)    Previously, disk mirroring could not be used for disk drives greater

 
           than 255MB if the first volume had been assigned less than the  
           default 255MB.  In 2.15 revision C the installer is not limited  
           to the default volume size on large disk drives. 
 
     3)    If disk mirroring is occurring on a single disk coprocessor, a  
           mirrored disk drive failure could take down the entire channel.   
           This problem has been fixed--when a mirrored disk drive failure  
           occurs, only the failed device is shut down.  The rest of the  
           channel is not affected. 
 
     Removable Disk Drives 
 
     1)    Directory caching on a removable hard disk drive can now be enabled 

           without causing a GPI. 
 
     2)    The DISMOUNT command will now free the memory allocated by the  
           MOUNT command.  (Previously, too many consecutive MOUNT and  
           DISMOUNT commands would eventually hang the server.)   
 
     3)    Multiple removable drives can now be mounted correctly. 

