Adaptec AHA-2940UW User Guide - Page 30

AHA-2940UW/OF and AHA-2944UW/OF User's Guide Configuring SCSI Channel Interface Definitions The following four options enable you to configure the SCSI channel interface: s Host Adapter SCSI ID- This option allows you to select the single-chip host adapter's SCSI Initiator ID. The default setting for all models is 7, which has the highest priority on the SCSI bus. Each SCSI device on the bus, including the host adapter, must have a unique SCSI ID. The SCSI ID identifies each SCSI device on the SCSI bus and is used to determine the device's priority on the bus during arbitration, as follows: Highest Lowest 7 6 5 4 3 2 1 0 15 14 13 12 11 10 9 8 Consider the following before you select the host adapter SCSI ID: - If more than one SCSI host adapter is installed in the computer, each has its own SCSI bus. Devices can have the same SCSI IDs as long as they are not on the same bus. - If two host adapters are installed in two different computers and are attached to the same SCSI bus so they can share SCSI devices, the Host Adapter SCSI ID settings for each adapter must be different. (IDs 6 and 7 are preferred because they have the highest priority on the SCSI bus.) - When using both Wide and Narrow SCSI devices, it is necessary that you limit the Host Adapter SCSI ID setting to 0 through 7 because using SCSI Initiator IDs of greater than 7 will preclude host adapter reselection by Narrow devices. s SCSI Parity Checking- This option enables or disables SCSI parity checking. The single-chip host adapter always checks parity when reading from the SCSI bus to verify the correct transmission of data from the attached SCSI devices. Set SCSI Parity Checking to Disabled only if any attached devices do not support SCSI parity. The default setting is Enabled. 3-6 Downloaded from www.Manualslib.com manuals search engine