Adaptec SCSI RAID 2120S/2200S Software User’s Guide

5The Select SCSI Channel menu is displayed. Select the appropriate channel from this menu.

You can modify the following SCSI Channel Interface Definitions:

■Controller SCSI Channel ID — Sets the controller’s SCSI ID. We recommend that you leave the controller set to SCSI ID 7, which gives it the highest priority on the SCSI channel.

■SCSI Parity Checking — Determines whether the controller verifies the accuracy of data transfer on the SCSI channel. You should disable SCSI Parity Checking on the controller and all SCSI devices if any SCSI device supported by the controller does not support SCSI parity; otherwise, leave it enabled. Most SCSI devices do support SCSI parity. If you are not sure whether a device supports SCSI parity, consult the documentation for the device.

■Controller SCSI Channel Termination — Sets termination on the controller card. We recommend that you leave the default setting of Auto Mode.

■SCSI Device Configuration — For information about these options, see the section, SCSI Device Configuration Options.

SCSI Device Configuration Options

The SCSI device settings allow you to configure certain parameters for each device on the SCSI channel. To configure settings for a specific device, you must know the SCSI ID assigned to that device. If you are not sure of the SCSI ID, see Using the Disk Utilities on page 2-15.

■Maximum Transfer Rate — Determines the maximum data transfer rate that the SCSI channel supports. The maximum effective data transfer rate is doubled when Initiate Wide Negotiation is set to Yes and 16-bit devices are attached. (Initiate Wide Negotiation has no effect with 8-bit devices.)

■Enable Disconnection — Determines whether the SCSI channel allows the SCSI device to disconnect from the SCSI channel (sometimes called Disconnect/Reconnect or Reselection). This option should be enabled for maximum performance. The default is yes.

2-14