Adaptec 1520A User Guide - Page 29

Host Adapter Configuration Host Adapter Settings SCSI Disconnection This setting determines whether the host adapter allows a SCSI device to disconnect from the SCSI bus (sometimes called Disconnect/Reconnect). Enabling disconnection allows the host adapter to perform other operations on the SCSI bus while the SCSI device is temporarily disconnected. When disconnection is allowed, which is the default setting, the SCSI device may disconnect from the SCSI bus. The SCSI device may choose not to disconnect, however, even if permitted by the host adapter (this can usually be configured on the SCSI device). Leave Enable Disconnection at its default value if the host adapter connects to two or more SCSI devices. This optimizes SCSI bus performance. If the host adapter connects to only one SCSI device, set Enable Disconnection to no to achieve slightly better performance. SCSI ID Each host adapter on the host adapter has the default SCSI ID of 7, which gives the host adapter the highest priority on the SCSI bus. We recommend that you leave each host adapter ID at 7. For more information on SCSI IDs, see Setting SCSI IDs on page 3-5. SCSI Parity Checking SCSI parity checking is a procedure used by the host adapter to verify the accuracy of data transfer on the SCSI bus. By default, parity checking is enabled on all host adapter host adapters. Disable parity checking for a host adapter if any SCSI device on the host adapter does not support SCSI parity. Most currently available SCSI devices support SCSI parity. If you are not sure whether a device supports SCSI parity, consult the documentation for the device. 2-9 AAAAAAAAAAAAAAAAAASPCAAAAAArtuHoiAAArncAAAArtkAAAe-SAAAn1NAAApt5AAAeuD1AAAcmAAA0aAAANtAbeAAAeu:/AAAr2mAAA1:0AAA15bAAAA/1eAAA1rAAA0S8:AAA4/e4AAA90rAAA94i0eAAA1-AAAs08AAAU04AAA,2AAAsR-AAAe0AAAre0'AAAvsAAA.AAAGCAAAuAAAAAAidAAAeAAAAAAAAAEAAACAAAAAANAAAAAADAAAAAAaAAAtAAAeAAA:PAAA1aAAA1AAAg/AAAe2AAA:9AAA2/AAA9-AAA49AAAAAAAAAAAAAAAAAAAA