Applications developed with the semAPI version 2.0 and greater are not compatible with older versions of the semAPI. Hence, PI Bailey semAPI interface version 1.2 can only work with semAPI version 1.2 while interface version 1.3 and greater can only work with semAPI version 2.0 and greater.
OSM01 Not Recommended
The interface sometimes loses communication with the OSM01. In most cases, the interface process cannot re-establish communication automatically. The cause of the loss of communication is still unknown. Also, the OSM01 will take ten times as long to establish an equal number of points as compared with direct SCSI connection with ICI03. For these reasons, currently, it is not recommended to use OSM01 with the PI semAPI interface.
If the SCSI connection between the host computer and the ICI03 was disconnected for a short while (one minute for example) while running with semAPI version 1.2 on Windows and then re-connected, subsequent calls to the semAPI would result in an error. The problem would not go away unless the Bailey device driver process was stopped. The same problem was also observed if the ICI module was reset. These problems are fixed with semAPI version 2.0 and greater.
Some systems with many points on a Bailey loop different from where the ICI is located could take more than 90 seconds to connect to these points. However, the ICI watchdog timer is activated as soon as the connect point command is received by the ICI. So it is possible for the ICI to timeout in the middle of processing the connect point command. In this case, the /TO parameter must be increased to work around the problem.
Adaptec 2940 U SCSI, 50-pin Card with the ICI03
According to Bailey, customers should use the Adaptec 2940 U SCSI, 50-pin card with the ICI03. Additionally, they should order the 18-foot SCSI cable from Bailey, part no. AI1758-18.
